Слова на букву eleu-frin (732) Dictionary of invertebrate zoology
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Слова на букву eleu-frin (732)

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n.; pl. -labra [Gr. epi, upon; L. labrum, lip] (ARTHROPODA) In Myriapoda, a sclerite on each side of the labrum.
n. [Gr. epi, upon; limne, lake] The upper layer of water found in deep lakes; see thermocline and hypolimnion.
n. [Gr. epi, upon; L. lobus, a rounded projection] (ARTHROPODA: Insecta) A lateral appendage of the mentum of ground beetles.
adj. [Gr. epi, upon; L. lobus, a rounded projection] (ANNELIDA: Oligochaeta) A prostomium that is continued by a tongue into the peristomium but without reaching the ...
adj. [Gr. epi, upon; megas, large] (ARTHROPODA: Insecta) Being the largest in a series of polymorphic forms.
pl. epimeron.
epimeral fold
(ARTHROPODA: Crustacea) In Decapoda, the folded endopleurites connected to the branchiostegite that forms the branchial chamber.
epimeral parapterum
(ARTHROPODA: Insecta) The posterior basalar sclerite between the pleural wing process and the epimeron of the wing bearing segment.
epimeral suture
(ARTHROPODA: Insecta) The caudal portion of the sternopleural suture.
n. [Gr. epi, upon; meros, part] 1. (ARTHROPODA: Crustacea) A dorsolateral, flat overhanging keel on the somites which may form a carapace, flattened shield or clam-shell ...
n.; pl. -ra [Gr. epi, upon; meros, part] 1. (ARTHROPODA) In Arachnida and Diplopoda, a ventral plate to which the basal segment of the leg is attached; a coxal plate. 2. ...
n. [Gr. epi, upon; morphosis, form] 1. With the same form in successive stages of growth; see anamorphosis, metamorphosis. 2. Larval forms which are suppressed or passed ...
epineural canal
(ECHINODERMATA) A canal or sinus between each radial nerve and the epidermis.
epineural sinus
(ARTHROPODA: Insecta) In embryology, the development of primary body cavity between the upper surface of the embryo and the yolk.
n. [Gr. epi, upon; neuron, nerve] 1. Outermost connective tissue sheath on the nerve. 2. (ARTHROPODA: Insecta) The fibrous connecting tissue that invests a nerve ...
epinotal spines
(ARTHROPODA: Insecta) In Formicoidea, the spines on the first abdominal segment that protect the pedicel.
n. [Gr. epi, upon; notos, back] (ARTHROPODA: Insecta) In Formicoidea, the thoracic dorsum posterior to the mesonotum, consisting of the metanotum and propodeum; see ...
see medulla.
n. [Gr. epi, upon; ostrakon, shell] (ARTHROPODA: Chelicerata) 1. A thin elastic, colorless layer of the cuticle of arachnids which overlies the ectostracum layer; further ...
adj. [Gr. epi, upon; pelagos, sea] Pertaining to suspended organisms inhabiting an aquatic environment between the surface and a depth of 200 m; see mesopelagic, ...
n. [Gr. epi, upon; phallos, penis] 1. (ARTHROPODA: Insecta) a. In male Orthoptera, a plate on top of the genital complex. b. In male Dictyoptera, a pair of valves dorsad of ...
epipharyngeal wall
(ARTHROPODA: Insecta) The inner surfaces of the labrum and clypeal regions of the head.
n. [Gr. epi, upon; pharynx, throat] (ARTHROPODA: Insecta) A small medium lobe on the interior surface of the labrum or clypeus; epipharyngeal adj..
n. [Gr. epi, upon; phragma, partition] (MOLLUSCA: Gastropoda) In land snails, a sheet of dried mucus across the aperture preventing loss of moisture during aestivation or ...
n.; pl. -ses [Gr. epi, upon; phyein, cause to grow] 1. (ARTHROPODA: Insecta) In Lepidoptera, a lamellate spur or process on the inner surface of the fore tibia bearing a ...
n.; pl. -rae [Gr. epi, upon; pleura, side] (ARTHROPODA: Insecta) In Coleoptera, the infolded lateral edge of the elytra.
epipleural sclerites
(ARTHROPODA: Insecta) One or two small sclerites in the membranous area between the thoracic pleura and the wing bases that are important to wing movement due to muscle ...
n. [Gr. epi, upon; pleuron, side] (ARTHROPODA: Insecta) 1. Among coleopterous larvae the lateral area above the ventrolateral suture and below the dorsolateral suture. 2. ...
see caul.
(ite) n. [Gr. epi, upon; pous, foot] (ARTHROPODA: Crustacea) A laterally directed exite of the protopod, usually branchial in function; a laterally directed ramus of the ...
epipodial plate
(ARTHROPODA: Crustacea) In Ostracoda, a setaceous respiratory plate on the maxilla or the fifth limb.
n.; pl. -dia [Gr. epi, upon; pous, foot] (MOLLUSCA: Gastropoda) Lateral grooves between foot and mantle, with tentacles and integumentary sensory organs, usually flat.
n. [Gr. epi, upon; proktos, anus] (ARTHROPODA: Insecta) A process or appendage situated above the anus; the dorsal part of the eleventh abdominal segment; see suranal plate. ...
n. [Gr. epi, upon; pro, before; soma, body] (ARTHROPODA: Chelicerata) In Acari, a body division consisting of gnathosoma and aspidosoma.
n.; pl. -mata [Gr. epiptygma, overflap] (NEMATA) Anterior and posterior cuticular flaps associated with the vulval opening of some female nematodes; see hypoptygma.
n. [Gr. epi, upon; pyge, rump] (ARTHROPODA: Insecta) A dorsal arch in the last abdominal segment.
n. pl., sing. -sum [Gr. epirrheein, to flow into] (PORIFERA) The inhalent canals; see prosochete, aporrhysa.
adj. [Gr. epi, upon; sema, sign] A term used to designate distinctive markings which serve as a recognition signal; see pseudepisematic color; sematic.
n. [Gr. epi, upon; sitos, food] A predator able to complete its life cycle by devouring a succession of victims.
n. [Gr. epi, upon; stasis, a standing] When one gene interferes with the phenotypic expression of another nonallelic gene (or genes), producing a phenotype determined by the ...
episternal lateral
see pre-episternum.
episternal paraptera
(ARTHROPODA: Insecta) One or two anterior basalar sclerites in front of the pleural process in the membrane at the base of the wings; indistinctly separated from the ...
episternal suture
(ARTHROPODA: Insecta) The anterior part of the sternopleural suture.
n.; pl. episterna [Gr. epi, upon; sternon, chest] 1. (ARTHROPODA: Crustacea) In Decapoda, the posterolateral projection of various sterna. 2. (ARTHROPODA: Insecta) The ...
see epistome.
epistomal ridge
(ARTHROPODA: Insecta) The cranial inflection of the epistomal sulcus.
epistomal sulcus or suture
(ARTHROPODA: Insecta) The groove situated between the frons and clypeus that unites with the anterior ends of the subgenal sulcus extending to the anterior tentorial pits. ...
См. epistomum.
См. epistomum.
n. [Gr. epi, upon; stoma, mouth] 1. (ARTHROPODA: Chelicerata) See tectum, cervix. 2. (ARTHROPODA: Crustacea) In brachyuran Decapoda, a plate of varying shape between the ...
n. [Gr. epi, upon; theke, case] (CNIDARIA) The external layer surrounding the theca in many corals.
epithelial layer
1. Any layer of cells, one surface of which is lining a tube or cavity. 2. (BRYOZOA) A single layer of cells of two types: secretory cells and fat storage cells.
epithelial syncytium
Multinucleated epithelial cells.
epithelial tissues
Surface tissues in which the cells form regular layers, containing very little intercellular material.
adj. [Gr. epi, upon; thele, nipple; L. musculosus, fleshy] (CNIDARIA) Pertaining to epithelium with a longitudinal contractile fiber at the base; myoepithelial.
n., pl. -lums, -lia [Gr. epi, upon; thele, nipple] An epithelial tissue, covering an external or internal surface.
n. [Gr. epi, upon; tokos, birth] (ANNELIDA: Polychaeta) The posterior sexual portion of certain marine worms; see atoke.
n. [Gr. epi, upon; tokos, birth] (ANNELIDA: Polychaeta) Reproduction of certain dimorphic swarming worms in which structural modifications such as enlarged eyes, ...
n.; pl. -mae [Gr. epi, upon; tormos, socket] (ARTHROPODA: Insecta) In scarabaeoid larvae, a rod extending from the inner end of the laeotorma. a. Epitorma anterior, when ...
adj. [Gr. epi, upon; zoon, animal] Pertaining to an organism living on, or attached to the body of another animal; see endozoic.
n. [Gr. epi, upon; zoon, animal; L. caedere, to kill] An agent that destroys epizoa.
n.; pl. epizoa [Gr. epi, upon; zoon, animal] An animal parasite living upon the exterior of the body of the host; an external parasite.
adj. [Gr. epi, upon; zoon, animal] An outbreak of disease in animals in which there is an unusually large number of cases; identical to an epidemic in humans.
n. [Gr. epi, upon; zoon, animal; logos, discourse] The field concerned with the study of diseases of animals involved in an epizootic outbreak.
n. [Gr. epi, upon; zygon, yolk] (ECHINODERMATA: Crinoidea) The distal member of a syzygial pair of brachials; see hypozygal.
n.; pl. epizyga [Gr. epi, upon; zygon, yolk] (ARTHROPODA: Insecta) In certain beetle larvae, an elongate plate or bar extending from the zygum toward the clithrum on the ...
n. [Gr. epoche, stop] Subdivision of a period or division in geologic time.
n.; pl. -ae [Gr. epomidios, on the shoulder] (ARTHROPODA: Insecta) 1. The margin of the propleural furrow in which the front femur is inserted. 2. In ichneumonid ...
adj. [L. ex, out of; pupilla, pupil of eye] Without a pupil or color spot; pertaining to ocellate spots.
equal weighting
Treating all taxonomic characters as equally important.
equatorial plate
Plane where chromosomes gather during metaphase of mitosis or meiosis.
adj. [L. aequus, uniform; distantia, remoteness] Equally spaced from any two or more points.
equilateral shell
(MOLLUSCA: Bivalvia) With the shell parts equal or almost equal anterior and posterior to the beak.
adj. [L. aequus, uniform; libra, balance] Balancing equally.
adj. [L. aequus, uniform; Gr. meros, part] (ANNELIDA: Oligochaeta) Pertaining to regenerates having the same number of segments as had been amputated. equimery n.
adj. [L. aequus, uniform; pes, foot] Possessing pairs of equal feet.
adj. [L. aequus, uniform; potens, powerful] Differing cell parts or organs capable of performing like functions.
adj. [L. aequus, uniform; valva, leaf of a folding door] (MOLLUSCA: Bivalvia) When two valves (shells) are the same shape and of equal size.
n. [L. aera, epoch] A division of geologic time, such as Palaeozoic, etc.; divided into periods.
v. [L. ex, out of; radiatus, rayed] To shoot forth as rays of light; to radiate.
adj. [L. erectus, upright; patens, open] (ARTHROPODA: Insecta) Pertaining to having the fore wings erect and the hind wings partially spread during resting.
n. [Gr. ereisma, prop] (ARTHROPODA: Insecta) The furcula in Sminthurus which has a fanlike structure.
adj. [Gr. eremos, solitary; bios, life] Living a solitary existence.
adj. [Gr. eremos, solitary; chaite, mane] Lacking the normal arrangement of bristles.
n. [Gr. eremia, desert; logos, discourse] A science concerned with the desert and its phenomena.
adj. [Gr. eremia, desert; philos, loving] Desert loving; pertaining to animals that live in deserts or arid regions.
n. [Gr. eremos, solitary; syn, together; bios, life] A species living in an ant nest for protection, not taking or contributing anything.
adj. [Gr. ergastikos, fit for working] Pertaining to the integration or union of parts during evolution; see metaplasm.
n. [Gr. ergaesthai, working; plasma, form or mold] 1. Granular endoplasmic reticulum. 2. A former conception of cytoplasm, the fibrillar or flocculent masses found in many ...
n. [Gr. ergates, worker; aner, man; morphe, form] (ARTHROPODA: Insecta) An abnormal ant possessing the worker characteristics, combined with qualities of the male; see ...
see ergatomorphic male.
n. [Gr. ergates, worker] (ARTHROPODA: Insecta) A type of worker ant.
n. [Gr. ergates, worker; gyne, female; andros, male; morphe, form] (ARTHROPODA: Insecta) A mosaic form of ant possessing qualities of male and worker; see ergatandromorph.
n. [Gr. ergates, worker; gyne, female] (ARTHROPODA: Insecta) A form intermediate between the worker and queen.
ergatoid male
see ergatomorphic male.
ergatoid reproductive or ergatoid
(ARTHROPODA: Insecta) Supplementary reproductive termite, usually larval in appearance with a distinctive rounded head; tertiary reproductive; apterous neote(i)nic.
ergatomorphic male
(ARTHROPODA: Insecta) A social insect with normal male genitalia and a worker-like body; an ergatoid male; an ergataner.
ergatotelic type
(ARTHROPODA: Insecta) A group of social insects, including the honey-bees in which the queen manifests only secondary instincts, while the workers retain the primary ...
n. [Gr. ergon, work; nomos, law] (ARTHROPODA: Insecta) The quantitative study of the distribution of work performance and efficiency of social insects.
adj. [Gr. erike, heath; L. colere, to inhabit] Inhabiting a heath or similar environment.
erichthus larva
(ARTHROPODA: Crustacea) In Hoplocardia, a megalopa type larva of mantis shrimp in the families Lysiosquillidae and Gonodactylidae.
n. [L. erosus; eaten away] 1. Wearing away of soil because of wind, water, or gravitational action. 2. (MOLLUSCA: Gastropoda) The disintergration of the apex of the shell.
n. [L. errere, to wander] 1. Mobile organisms. 2. (ANNELIDA: Polychaeta) Sometimes used as a taxonomic group.
n.; pl. erucae [L. eruca, caterpillar] (ARTHROPODA: Insecta) A caterpillar or other insect larva similar in appearance.
adj. [L. eruca, caterpillar; forma, shape] (ARTHROPODA: Insecta) Having a body shaped like a caterpillar: cylindrical body, well developed head, thoracic legs, and ...
eruciform larva
(ARTHROPODA: Insecta) The larval instar of certain Hymenoptera and Lepidoptera, caterpillar-like larva with a well-developed head capsule, true legs and often abdominal ...
n. [L. eruca, caterpillar; -ismus, denoting condition] (ARTHROPODA: Insecta) Poisoning or rash caused by caterpillars or pupae; see lepidopterism, paraerucism, ...
adj. [L. eruca, caterpillar; vorare, to devour] (ARTHROPODA: Insecta) The eating of or on caterpillars.
n. [L. ex, out of; ructare, to belch] The emitting of contents from the intestine via the mouth.
eruptive cell
see spherule cell.
eryoneicus larva
(ARTHROPODA: Crustacea) . Having a well-developed head — used of the larvae of certain flies — see hemicephalous.
n. [Gr. aisthetes, perceiver; kytos, container] A sensory cell of certain primitive organisms.
n. [Gr. aisthetes, perceiver] Sensibility; sense-perception.
n. [Gr. aisthetes, perceiver; askos, bag] (ARTHROPODA: Crustacea) Sensory seta covered by a delicate cuticular membrane, often projecting from an antenna or antennule; ...
n. [Gr. aisthetes, perceiver] 1. Any invertebrate sense organ. 2. (ARTHROPODA) Usually applied as sensory nerve endings, but also used for sensory hairs and bristles. ...
v. [L. aestas, summer] To pass the summer in a quiet, torpid condition.
n. [L. aestas, summer] A form of dormancy during the summer months in high temperatures, or dry seasons; see hibernestivation.
having a well-developed head —used of the larvae of certain flies; see hemicephalous.
exploratory trail
(ARTHROPODA: Insecta) An odor trail laid by advance workers of a foraging group of social insects.
explosive cell
see spherule cell.
explosive evolution and speciation
Rapid formation of numerous types from a single or a few types.
adj. [L. ex, out of; sculpere, to carve] Having more or less irregular longitudinal lines with grooves between.
see escutellate.
adj. [L. exsertus, projecting] Protruding or projecting from the body.
adj. [L. exsertus, projecting] Capable of being exerted or extruded.
v. [L. ex, out of; A.S. sceath, case] To escape from the residual membrane (egg shell) of a previous developmental stage.
n. [L. exule, exile] (ARTHROPODA: Insecta) In apterous Adelges on the secondary host, give rise parthenogenetically to the neosistens form.
v. [L. ex, out of; tendere, to stretch] To spread or stretch out.
adj. [L. ex, out of; tendere, to stretch] Capable of being extended, stretched or spread.
extension plate
see unguitractor plate.
extension sole
(ARTHROPODA: Insecta) The pad-like pulvillus.
see unguitractor tendon.
extensor muscle
see unguitractor.
v. [L. ex, out of; tenuis, thin] To make or become thin or slender; to diminish.
adj. [L. exterus, out] Situated away from the central axis; outward; outside.
exterior skeletal wall
(BRYOZOA: Gymnolaemata) In Cheilostomata, a skeletal wall which calcifies against the cuticle; the membrane forming this wall expands the coelomic volume of the colony.
exterior wall
(BRYOZOA) Body wall that increases the size of the zooid body and colony.
adj. [L. exterus, outside] Outward; that part away from the center of the body.
external buttress
see buttress.
external cortical layer
(NEMATA) The outermost stratum of the cuticle, comprised of a dense outer area, an inner less dense area, and a thinner area.
external exocuticle
(NEMATA) In derived forms, a subdivison of the exocuticle.
external genitalia
The organs involved with sexual mating and the deposition of eggs.
external muscle
(BRYOZOA) A muscle extending from a body wall across the body cavity, to the lophophore or to the gut.
external parameres
(ARTHROPODA: Insecta) All male external genital appendages.
external parasite
An ectoparasite.
external respiration
The process of gaseous exchange between an organism and its environment.
external secretion
Any secretion to the outside of the body or into the cavity of the enteron.
external statocysts
(ARTHROPODA: Insecta) Special hair structures for the retention of the air supply that are adapted to underwater life.
external thickening
see buttress.
externomedial vein
(ARTHROPODA: Insecta) 1. In Hymenoptera, the radius. 2. In Orthoptera, the media.
externomedian nerve
(ARTHROPODA: Insecta) The humeral and discoidal veins collectively.
n. pl. [L. exterus, outside; capere, to take] Sense organs situated externally which respond to conditions in the external environment, as opposed to interoceptors.
see exogenous.
extra chromosomes
Any chromosome of a heterogeneous category of chromosomes that differ in their behavior from normal or A-chromosomes.
extra-axial skeleton
(PORIFERA) Skeletal elements that surround or arise from an axial region.
adj. [L. extra, outside; cellula, little cell] Pertains to being outside of the cell but within the organism.
extracellular digestion
Digestion of food within a cavity of the digestive system.
adj. [L. extra, outside; Gr. konos, cone] Almost conical, but with concave sides; see coeloconoid.
adj. [L. extra, outside; corpus, body] Occurring outside of the body.
extracorporeal digestion
A mode of feeding whereby some parasites and predators release esophageal or salivary secretions into the host or prey that predigests the internal contents of the host or ...
n. [L. extra, outside; F. dos, the back] The exterior curve of an arch; see intrados.
adj. [L. extra, outside; Gr. embryon, fetus] Outside the body of the embryo.
adj. [L. extra, outside; Gr. enteron, intestine] Outside the enteron.
adj. [L. extra, outside; nidus, nest] (ARTHROPODA: Insecta) In social insects, outside the nest or hive.
adj. [L. extra, outside; nucleus, kernel] Structures or processes found outside the nucleus.
adj. [L. extra, outside; oculus, eye] Away from or beyond the eyes.
adj. [L. extra, outside; os, mouth] Away from or beyond the mouth.
extrapallial space
(MOLLUSCA: Bivalvia) A narrow muscus-filled space between the mantle lobe and the valve of the shell.
extratentacular budding
(CNIDARIA: Anthozoa) Development of new polyps of a zoantharian colony from the tissue between existing ones.
adj. [L. extra, outside; tropicus, solstice] Outside of the tropics; not in the tropics.
adj. [L. extra, outside; Gr. zoon, animal] (BRYOZOA) A colony structure, protective or supportive in function, that remains outside zooidal boundries.
n.; pl. -ties [L. extremus, outermost] The remotest part or point from the base.
adj. [L. extrorsus, in an outward direction] 1. Not in or a part of a body or congregation; external. 2. Environmental influences on a population; see intrinsic.
extrinsic articulation
One in which the articulating surface of contact is outside of the skeletal parts; see intrinsic articulation.
extrinsic muscles
Muscles which move an organ (leg, etc.), but that originate outside of it; see intrinsic muscles.
adj. [Gr. extrorsus, in an outward direction] Turning or facing outwards; toward the outside; see introrse.
v. [L. ex, out of; trusus, thrust] To turn; to force out.
n. [L. exsudo, discharge by sweating] Any flow from the body or organ through pores or openings by natural discharge.
n. [L. exsudo, discharge by sweating] (ARTHROPODA: Insecta) Finger-like appendages of certain larvae of ants and termites that produce secretions attractive to the workers.
v. [L. exsudo, discharge by sweating] To ooze moisture or other liquids through minute openings.
adj. [L. ex, out of; umbilicus, navel] Lacking an umbilicus.
n. [L. ex, out of; dim. umbra, shade] (CNIDARIA: Scyphozoa) The convex aboral surface of a medusa or jellyfish; see subumbrella.
n.; n. pl. exuviae [L. exuvia, cast] The cast parts of the cuticle; cuticle shed at a molt; usually used only in the plural.
exuvial glands
Certain epidermal glands associated with the molting fluid during ecdysis at molting.
exuvial space
(ARTHROPODA: Insecta) An area between the epidermis and the cuticle into which the molting enzymes are secreted after apolysis.
v. [L. exuvia, cast] To cast skin or shell; to molt.
n. [A.S. eage, eye] An organ of sight; a photoreceptor; a compound eye; an ocellus.
eye brush
see prosartema.
eye cap
(ARTHROPODA: Insecta) In Lepidoptera, a structure overhanging or capping the compound eye.
(ARTHROPODA: Insecta) In Diptera, eyes dorsally joined above the antennae by a narrow line of facets.
n. pl. [A.S. eage, eye; ME. spotte, spotted] Pigmented areas in many invertebrates to which are attributed various functions: a simple eye or visual organ (ocellus); ...
see ocular peduncle.
F 1
First filial generation, arising from a cross, subsequent generations abbreviated F 2 , F 3 , etc; see P 1.
n. [L. facies, countenance] 1. The surface of anything. 2. (ARTHROPODA: Insecta) The front of a verticle head between the compound eye above the mouth to vertex. a. In ...
n. [F. facette, small face] 1. A small surface. 2. (ARTHROPODA: Insecta) The external surface or part of a compound eye unit or ommatidium.
n. [F. facette, small face] (ARTHROPODA: Pentastomida) A funnel-shaped opening through the inner membrane complex of the egg into which the product of the dorsal organ is ...
facetted eye
see compound eye.
facial angle
(ARTHROPODA: Insecta) The angle formed by the point of union of the face and vertex.
facial bristles
see oral vibrissae.
facial carina
(ARTHROPODA: Insecta) One of the carinae of the frontal costa and of the accessory carinae of the face. a. In Orthoptera, one of the accessory carinae. b. In Diptera, the ...
facial depression
(ARTHROPODA: Insecta) 1. The antennal groove. 2. For Diptera, the middle of the face; the facial plate.
facial orbit
(ARTHROPODA: Insecta) On the head, the region next to the mesal margin of a compound eye.
facial plate
(ARTHROPODA: Insecta) In Diptera, the central part of the face.
facial quadrangle
(ARTHROPODA: Insecta) In bees, the quadrangle formed by the eyes laterally, and between their apex and below by a line between their lower points.
facial ridge
see vibrissal ridge.
see vibrissal ridge.
see face.
facio-orbital bristles
(ARTHROPODA: Insecta) In Diptera, bristles on each side near the orbit, may extend to the gena or cheek; orbital bristles; see genal bristles.
n. [L. facere, to do, to make] 1. An agent or causative agent in genetics determining development of a hereditary character in offspring. 2. (PORIFERA) A cell ...
n. [L. facultas, capability] The ability to live under different conditions; see obligate.
facultative meiotic parthenogenesis
The diploid chromosomal complement in the reduced oocytes is restored by fusion of the second polar nucleus with the egg pronucleus; see automictic meiotic ...
facultative parasite
1. A parasitic organism that can develop inside a host, but still retains the ability to complete a freeliving life cycle in the outside environment. 2. Organisms normally ...
facultative symbiont
A symbiont that establishes a relationship with a host only if the opportunity presents itself; see obligate symbiont.
see feces.
Fahrenholz's rule
Common ancestors of present day parasites were themselves parasites of the common ancestors of present day hosts; parasite phylogeny mirrors host phylogeny.
adj. [L. falx, sickle] Sickle-shaped, hooked or new moonshaped.
n. pl.; sing. falx, falcis [L. falx, sickle] 1. (ARTHROPODA: Chelicerata) Falces used to denote chelicerae of ticks; chelicerae of certain arachnids. 2. (ARTHROPODA: ...
adj. [L. falx, sickle; forma, shape] Having the shape of a sickle; curved like a sickle.
n. [L. falx, sickle; gerere, to carry] (ANNELIDA) A compound, distally blunt, curved seta.
adj. [L. dim. falx, sickle] Curved with a sharp point.
see cibarial teeth.
false head
(ARTHROPODA: Insecta) In some syrphid fly larvae, a broad globulose or hood-like cephalic segment(s) with a visible constriction beHind.
false legs
see prolegs or spurious legs.
false umbilicus
(MOLLUSCA: Gastropoda) A cavity or depression in the base of the last whorl of the shell; a pseudumbilicus.
n.; pl. -li [L. famulus, servant] (ARTHROPODA: Chelicerata) In Acari, microsensory seta found on the genu, tibia and tarsi.
n. [A.S. fann, fr. L. vannus, fan] 1. A segment or process flattened and spread triangularly or in a semicircle, appearing fan-like. 2. (ANNELIDA: Polychaeta) The parapodia ...
n. [A.S. fang, seizure] (ARTHROPODA: Chelicerata) The clawlike distal segment of the chelicera of spiders.
adj. [L. farctus, filled] Fully filled; distended; to swell out.
adj. [L. farina, flour] 1. Mealy. 2. (ARTHROPODA: Insecta) Has been used to describe powdery looking insect surfaces and wings; pulverulent; pollinose.
n., pl. -ciae [L. fascia, bundle] 1. A broad and well-defined band of color; striped. 2. Marked with transverse bands of color; see vitta. 3. A layer of connective ...
См. fasciculus.
n.; pl. -li, -les [L. dim. fascia, bundle] 1. A small bundle or tuft. 2. A bundle of nerve or muscle fibers. 3. (ANNELIDA) A bundle of setae originating from a common ...
Having spots arranged in bands.
Ornamented with colored points arranged in bands.
n. [L. dim. fascia, bundle] 1. (CNIDARIA: Echinoidea) In Spatangidae, a small band of minute spine-bearing tubercles used to produce water currents in the burrow for ...
fastening muscle
См. fixing muscle.
adj. [L. fastigium, gable end] Arranged into a conical bundle.
n. [L. fastigium, gable end] (ARTHROPODA: Insecta) In Orthoptera, the anterior dorsal surface of the vertex of grasshoppers.
fat body
Aggregated cells that store food reserves, storage for excretory materials, or light producing organ; a center in which many metabolic processes occur.
fate map
Diagrammatic method of indicating the fate of embryonic cells.
n. pl. [L. fauces, gullet] That portion of the interior of a spiral shell that can be viewed by looking into the aperture.
n. [L. Faunus, diety of herds and fields] The animal life of a region; see flora, biota.
faunal region
An area where certain groups of animals are found.
adj. [L. favus, honeycomb] Pitted; having depressions or cells resembling a honeycomb; favose.
n. pl. [L. faex, dregs] Pertaining to sediment, refuse or excrement.
n. [L. dim. faex, dregs] (ARTHROPODA: Insecta) Excrement.
v.t. [L. fecundus, fruitful] To fertilize; to impregnate.
n. [L. fecundus, fruitful] The potential reproductive capacity as measured by the quantity of gametes, particularly eggs, produced.
feedback mechanism
Regulation mechanism in cells by which the final product of a metabolic reaction inhibits further production of that product.
feeding zooid
(BRYOZOA) A zooid that at some developmental stage feeds and provides nourishment to the entire colony.
n. [A.S. felan, to feel] A tactile organ of many invertebrates.
felt chamber
(ARTHROPODA: Insecta) A spongy structure within the spiracular chamber of larval trypetid flies, thought to act as an air filter.
felt setae
(ANNELIDA: Polychaeta) In scale worms, threadlike setae that arise from the notopodia and trail back over the dorsal surface of the animal.
female ducts
see gonoduct, oviduct.
female encystment
see matricidal hatching.
female funnel
(ANNELIDA: Oligochaeta) Enlargement of the ental end of an oviduct of earthworms that facilitates entry of the ova on their way to the exterior.
female pores
(ANNELIDA: Oligochaeta) The external apertures of the female ducts of earthworms.
femoro-alary organs
(ARTHROPODA: Insecta) A stridulatory apparatus.
n. [L. femur, thigh; genu, knee] (ARTHROPODA: Chelicerata) In mites, a leg segment resulting from the fusion of the femur and genu.
femorotibial joint
(ARTHROPODA) One of the two primary bendings of a typical leg, pertains to the femur and the tibia; see coxotrochanteral joint.

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