n.; pl. -ties [L. intentus, intent]
The total number of parasites in an individual; see burden.
The radially arranged arms (typically 5) that do not bear tube feet or podia; see ambulacral areas.
Additional calyx plates between the arm bases in stalked crinoids.
In coccids, a group or transverse row of setae on the ventral aspect of the head between the articulation of the antennae.
In Siphonaptera, a suture extending between the bases of the antennae.
In some Malacostraca, a plate separating antennular cavities; proepistome.
A strong, narrow muscular band of tissue connecting the sheaths of the two ventral setae.
adj. [L. inter, between; brachium, arm]
Between adjoining arm tips, rays or brachial plates.
n. [L. inter, between; A.S. brod, broad]
Individuals capable of actual or potential gene exchange by hybridization.
adj. [L. intercalaris, that which is inserted]
Inserted or introduced between others; interpolated.
A non-reproductive stage between two reproductive stages in which the male gonopods and other secondary sexual structures regress.
1. An extra longitudinal wing vein of Ephemeroptera.
2. Convex wing vein which follows the crest of a ridge.
3. Concave wing vein on the bottom of ...
The outer walls of zooids attached to each other in a linear series.
adj. [L. inter, between; dim. cellula, little cell]
Lying between cells.
In Nephropidae, an oblique groove on the carapace that connects the postcervical and cervical grooves.
n. [L. inter, between; combiare, to exchange]
Reciprocal translocations between nonhomologous chromosomes.
In Acari, unpaired prosomatic gland emptying between the chelicerae; function unknown.
n. [L. inter, between; Gr. chroma, color; meros, part]
1. Regions connecting adjacent chromomeres.
2. (ARTHROPODA: Insecta)
Lighter staining areas of the giant chromosomes ...
adj. [L. inter, between; Gr. chroma, color; soma, body]
Reactions between chromosomes.
adj. [L. inter, between; costa, a rib]
Placed between the ribs of a shell.
n. [L. inter, between; costa, rib or side]
Between ribs or ridges.
In Coleoptera, a prosternal process, occasionally enlarged, partly concealing the coxae.
n. [L. inter, between; dens, tooth]
A shelly plate between the pseudocardinal and lateral teeth.
n. [L. inter, between; facies, countenance]
The common surfaces of two bodies.
adj. [L. inter, between; Gr. ganglion, swelling]
Between and uniting nerve ganglia.
adj. [L. inter, between; Gr. genos, race]
Changes involving more than one gene.
interior skeletal wall
In Cheilostomata, walls growing off the skeletal wall interiorly which partition the original coelomic volume of the colony.
Any body wall that partitions the body cavity into zooids, parts of zooids or extrazooidal parts.
n. [L. inter, between; Gr. kinesis, movement]
The abbreviated interphase between the first and second meiotic divisions with no chromosomal reproduction.
adj. [L. inter, between; labium, lip]
Situated between the lips.
adj. [L. inter, between; lamella, thin plate]
In some Balanomorpha, a line or lines extending between epicuticle of outer lamina through longitudinal septa into the inner lamina in sections ...
n. [L. inter, between; maxilla, jaw]
The maxillary lobe.
n. [L. inter, between; medius, middle]
Spicules between elements of principalia or dictyonalia.
In Stomatopoda, a row of small projections between the intermediate and submedian teeth on the lateroterminal margin of the telson.
One which alternates with the definitive host in which the parasite passes through partial development, but not to sexual maturity; see definitive host.
In Diptera, hypostomal sclerites shaped like an "H", joined together by a transverse bar, receiving the opening of the salivary duct.
A strong spinelike or blunt projection at the margin of the telson, between submedian and lateral teeth of mantis shrimp.
Any valve between head and tail valves; median valve; body valve.
adj. [L. inter, between; Gr. mitos, thread]
Interphase of mitotic cell cycle.
adj. [L. internus, within]
1. Located within the limits of the surface of something; situated on the side toward the median plane of the body.
Pertaining to ...
The ligament placed within the hinge and not visible when the valves are closed.
In male genitalia, the paired sclerotized appendages inside the external parameres.
The biochemical processes of metabolism that occur in all living cells that result in energy release.
Fleshy structures of the pharynx; pharynx folds or pods.
n. [L. inter, between; Gr. neuron, nerve]
Internuncial neuron or association neuron.
n. [L. inter, between; nodus, swelling]
1. The interval or part between two nodes or joints.
That segment of a jointed colony between surfaces of ...
n. [L. internus, inside]
Medulla of a mitochondrion.
The cell processes (trabecula) connecting the perikarya of cestode and trematode tegumental cells with the distal cytoplasm.
n. [L. inter, between; (re)capere, to take]
Sense organs situated internally that respond to internal conditions, as opposed to exteroceptors.
adj. [L. inter, between; osculari, to kiss]
Having characters common to 2 or more species or groups.
adj. [L. inter, between; Gr. petalon, leaf]
Area between ambulacral areas.
n. [L. inter, between; Gr. phasis, state]
The period between succeeding mitoses; see interkinesis.
n. [L. inter, between; Gr. pleuron, side]
An intersegmentalia between the pleurites.
adj. [L. inter, between; plicare, to fold]
Lying between folds.
Additional calyx plates between the radial plates in stalked crinoids.
n.; pl. -radii [L. inter, between; radius, ray, spoke]
1. Area between radii or perradii in radially symmetrical animals.
The second radius.
adj. [L. inter, between; ramus, branch]
Between two rami.
Cirrus on the ventral side of the notopodium.
adj. [L. inter, between; ruga, wrinkle]
adj. [L. inter, between; rumpere, to break]
Irregular; asymmetrical; broken in continuity.
adj. [L. inter, between; scutum, shield]
adj. [L. inter, between; segmentum, part]
In pigmented species of earthworms, the boundary between two consecutive segments where epidermis is thinnest and color is lacking.
In earthworms, a circumferential depression of strongly contracted specimens that contains the intersegmental furrow.
The flexible conjunctiva between two secondary segments where contraction of the longitudinal muscles produce telescoping of the segments.
n. pl.; sing. -lium [L. inter, between; segmentum, part]
1. Dorsal and ventral plates associated with narrow intersegmental sclerites which develop in ...
adj. [L. inter, between; septum, wall]
Spaces between septa.
n. [L. inter, between; sexus, sex]
An individual possessing both male and female characteristics; sex mosaic; see hermaphrodite.
adj. [L. inter, between; Gr. soma, body]
Between body segments or somites.
n. [L. inter, between; spatium, space]
1. Intervening time or space.
Spaces between costa of a shell.
adj. [L. inter, between; spiculum, small point]
n. [L. inter, between; sterilis, unfruitful]
Crosssterility between groups.
n. [L. inter, between; Gr. sternon, chest]
An intersegmental sclerite, located on the ventral side of the thorax; the spinasternum.
n. pl. [L. interstitium, space between]
A narrow space between the parts of a body or things close together; a crack, crevice or chink; interstitial adj..
Small undifferentiated epidermal cells which may give rise to cnidoblasts or nematocysts.
adj. [L. inter, between; stria, groove]
1. Between two striae.
2. (ARTHROPODA: Insecta)
see elytral intervals.
A small ciliated tube beneath the tentacle bases of the lophophore through which fertilized eggs pass to the outside.
n. [L. inter, between; tergum, back]
An intersegment between tergites.
The area bounded by the high and low tide lines; also known as the littoral.
adj. [L. inter, between; Gr. trochanter, runner]
n. [L. inter, between; vallum, a wall]
1. The space between elevations or depressions; see interspace.
2. Distance between points.
3. The time between periods of ...
adj. [L. inter, between; zona, belt]
Connection between chromatids during separation at anaphase in mitosis.
Budding that occurs outside of the living chambers of zooids producing a bud nonrelated to an individual parent zooid.
Growth of a wall between new polypides and parental polypides.
Polymorph between zooids communicating with two or more zooids in a space smaller than that occupied by an autozooid.
In Decapoda, marine lobsters with a short, transverse groove of the posterior carapace.
In a decapod carapace, a short transverse area behind the cardiac region; posterior cardiac lobe.
A narrow tube associated with the midgut; an accessory intestine.
n. [L. intestina, entrails]
The chief digestive portion of the enteron; gut.
n. [L. intimus, innermost]
The internal membranous lining of an organ; intimal adj..
n. [L. in, in; torquere, to twist]
A turning or twisting in any direction from the vertical.
Applied to certain stains having the property of tinting cells of living organisms without killing them.
In Diptera, a row of two or three bristles between the supra-alar and dorsocentral bristle groups.
adj. [L. intra, within; cellula, small cell]
Occurring within a cell or cells.
n. [L. intra, within; cambiare, to barter]
Exchange of segments within a chromosome resulting in chromosomal structural changes.
In Cheilostomata, skeletal layers between noncellular organic sheets or within organic networks of cuticles of the exterior walls.
n. [L. intra, within; F. dos, the back]
The interior curve of an arch; see extrados.
adj. [L. intra, within; Gr. haima, blood; koilos, hollow]
Within the hemocoel or perivisceral cavity of an invertebrate.
cleavage Cleavage where the nuclei undergo several divisions within the yolk without concurrent cytokinesis; common in arthropods.
n.; pl. intraparietes [L. intra, within; paries, wall]
In Lepadomorpha, the secondary lateral margin of the carina.
adj. [L. intra, within; Gr. petalon, leaf]
Within the area of the tube feet.
Type of respiration that does not involve movements of the outer body wall and is confined to the respiratory organs.
adj. [L. intra, within; segmen, piece]
Within a segment.
adj. [L. intra, within; spicula, little point]
Pertains to spicules completely embedded in spongin.
A zoantharian colony growing by asexual reproduction, through the formation of new mouths on the oral disk, resulting in branching, or in linear ...
adj. [L. intra, within; uterus, womb]
1. Within the uterus.
2. Applied to developing offspring hatching within the uterus of the mother; see matricidal hatching.
adj. [L. intrinsecus, inward]
1. Inherent or within.
2. Cycles of species in a population.
3. Rate of natural increase in a stabilized population; see extrinsic.
A type of articulation where sclerotic prolongations within the articular membrane make contact; see extrinsic articulation.
Muscles which move an organ (leg, etc.) that originate within the segment; see extrinsic muscles.
adj. [L. intro, within; ducere, to lead]
Not native but brought into an area by man.
n. [L. introitus, entered]
Opening or orifice.
adj. [L. intro, within; mettere, to send]
Designed for entering or inserting.
adj. [L. intro, within; versus, turn]
Facing or directed inward toward the axis; see extrorse.
n. [L. intro, within; versus, turn]
(BRYOZOA/SIPUNCULA) A cavity which accepts retractable appendages, e.g., the anterior cavity that accepts the anterior tentacles.
n. [L. in, in; tumescere, to swell up]
A swelling; being swollen or expanded.
n. [L. intus, within; suscipere, to take up]
Deposition of new particles of formative material among those already present in a tissue or structure; see apposition, ...
n. [L. in, into; vagina, sheath]
An infolding, or ingrowth of a sheet or layer of cells forming a pouch or sac, especially in embryos; see emboly.
adj. [L. invalidus, not strong]
Dismissing; without standing in zoological nomenclature.
Eyes in which the distal ends of the retinal cells face the interior of the cup or vesicle; see converse eyes.
n. [L. invertere, to turn around; -asis, ending signifying an enzyme]
An enzyme found in many plants and animal intestines that causes the hydrolysis of sucrose and converts ...
n. [L. in, not; vertebrata, with backbones]
Any animal without a backbone or vertebral column.
n. [L. investire, to clothe]
An outer covering of a cell, part, or organism.
adj. [L. ipse, same; latus, side]
Pertaining to or situated on the same side; see contralateral.
n. [L. iris, rainbow]
A rainbow-like display of interference colors that change with variations of the angle of view, due to diffraction of light reflected from ribbed or ...
n. [L. iris, rainbow; Gr. phoreus, bearer]
An iridescent chromatophore; an iridocyte.
n.; pl. irises, irides [L. iris, rainbow]
Dark pigment surrounding the compound eyes of arthropods and the camera- type eyes of cephalopods.
n. [L. in, not; regularis, according to rule]
Unequal, curved, bent; not regular.
n. [L. irritare, to provoke]
Ability to receive external impressions and the power to react to them.
n. [L. irritare, to provoke]
Any external stimulus that can provoke a response.
adj. [L. in, not; roris, dew]
Covered with minute marks, colors, or minute grains or specks of color.
n. [Gr. isos, equal; auxesis, growth]
Equality in growth; isometry; see bradyauxesis, heterauxesis, tachyauxesis.
n. [Gr. ischion, hip; keras, horn]
Third segment of an antennal peduncle.
adj. [Gr. ischion, hip; meros, part]
Refers to the third (ischium) and fourth (merus) segments of subchelate anterior appendages.
n. [Gr. ischion, hip; pous, foot]
The third segment of a generalized limb; the second trochanter, or second segment of the telopodite; prefemur; see ...
n.; pl. ischia [Gr. ischion, hip]
The third segment of a pereopod, or first segment of an endopod articulating with the basis; an ischiopodite.
n. [L. dim. insula, an island]
A spot in a plaga differing in color.
n. [Gr. isos, equal; allelon, one another]
An allele whose effect can only be distinguished from that of a normal allele by special techniques.
adj. [Gr. isos, equal; L. bis, twice; latus, side]
Having bilateral symmetry where a structure can be divisible in two planes at right angles.
adj. [Gr. isos, equal; brachion, arm]
A chromosome in which the centromere occupies the median position.
n. [Gr. isos, equal; chele, claw]
1. A chela with two like parts.
A diactinal microsclere with like recurved hooks, plates, flukes or anchor shaped at ...
adj. [Gr. isos, equal; chromos, color; soma, body]
Monocentric or dicentric chromosome with equal and genetically identical arms which are mirror images.
n. pl. [Gr. isos, equal; L. socius, companion]
A group of associated organisms with differing taxonomic affinities, at times used merely in the sense of habitat groups; see ...
adj. [Gr. isos, equal; kytos, container]
Having cells of equal size or height.
adj. [Gr. isos, equal; daktylos, finger]
Bearing digits of equal size.
adj. [Gr. isos, equal; dia, through; metron, measure]
Having equal diameters or axes.
adj. [Gr. isos, equal; dictyon, net]
Pertaining to a type of skeletal construction with spicules and/or fibers interlocking in a regular triangular pattern.
adj. [Gr. isos, equal; odous, tooth]
With hinge teeth arranged symmetrically; homodont.
n. [Gr. isos, equal; en, in; zyme, yeast]
An enzyme differing in polymorphic states and isoelectric point, but having the same function; an isozyme.
n. [Gr. isos, equal; gamete, spouse]
Outwardly similar male and female gametes.
n. [Gr. isos, equal; gamos, union]
The mutual fertilization process of isogametes.
n. [Gr. isos, equal; genos, race]
Lines on a gene map that connect points of identical gene frequency.
adj. [Gr. isos, equal; genos, race]
A group of individuals that have the same genotype.
adj. [Gr. isos, equal; glottis, mouth of the windpipe]
Having metarhabdions situated at the same level; see anisoglottid.
n. [Gr. isos, equal; graphion, stylus]
Tissue graft between animals of the same genotype.
n. [L. insula, island]
A breeding population or group of populations isolated from other populations by physiological, behavioral, or geographic barriers.
n. [L. insula, island]
Separation from similar forms.
An ova with yolk granules randomly distributed through the cell; a small amount of yolk; an oligolecithal egg; see centrolecithal egg.
n. [Gr. isos, equal; meros, part]
Compounds of the same chemical composition but with different structures.
n. pl. [Gr. isos, equal; meros, part; -asis, enzyme]
Enzymes which convert one chemical compound to another; said to be isomeric compounds.
adj. [Gr. isos, equal; meros, part]
Equivalent genes which can each produce the same phenotype.
adj. [Gr. isos, equal; meros, part]
Having equal number of parts, ridges or markings; homoeomerous; see heteromerous.
n. [Gr. isos, equal; metron, measure]
Growth of two body parts remaining constant relative to each other as body size increases.
adj. [Gr. isos, equal; morphe, form]
Alike or identical in appearance; isomorphous; see anisomorphic.
n. [Gr. isos, equal; morphe, form]
Similarity of organisms of different ancestry; see heteromorphic.
Having adductor muscles equal or subequal in size; homomyarian.
n. [Gr. isos, equal; onyma, name]
The new name of a species, or higher classification being based upon the older name or basinym.
n. pl.; sing. -us [Gr. isos, equal; L. palpus, feeler]
Palpi with the same number of joints.
n. [Gr. isos, equal; phainein, to show]
1. A line connecting points of equal expression of a clinally varying character.
2. A line connecting areas in a region at which a ...
n.; pl. isophena [Gr. isos, equal; phainein, to show]
Maintaining the same form, except sometimes in size, after a growing- or repetition-molt.
adj. [Gr. isos, equal; phainein, to show]
Showing characteristics of a phenotype.
adj. [Gr. isos, equal; pous, foot]
Having the legs alike and equal.
n. [Gr. isos, equal; pyknos, thick]
Chromosome or chromosome regions which do not differ greatly from each other.
adj. [Gr. isos, equal; pyge, rump]
Having pygidium and cephalon equal in size.
n. [Gr. isos, equal; rhiza, root]
A form of nematocyst in which the tube is open and the same diameter along the tube, responding to mechanical stimuli, and is ...
adj. [Gr. isos, equal; strophe, turn]
Having two faces of the shell symmetrical with respect to a median plane perpendicular to axis.
adj. [Gr. isos, equal; temnein, to cut]
The process of regularly repeated bifurcation as in crinoid branchia.
adj. [Gr. isos, equal; tropein, to turn]
Singly refracting, as the light stripes of voluntary muscle fibers; see anisotropic.
n. [Gr. isos, equal; typus, image]
1. An animal, plant or group frequently found in two or more countries or life regions.
2. A specimen collected from the type locale or ...
adj. [Gr. isthmos, neck]
Connected by an isthmus-like part.
n. [L. fr. Gr. isthmos, neck, narrow place]
Part of the mantle that secretes the horny uncalcified material (conchiolin) of the ligament.
adj. [L. iterare, to repeat; parere, to bear]
Having the capability to reproduce two or more times during a lifetime.
The ciliated somatoderm; the number of body rings and their arrangement is of taxonomic importance.
A region of the vas deferens through which sperm is emitted; see ejaculatory duct.
A chordotonal organ located in the second segment of the antenna and functioning in sound perception, flight speed indicator or water wave perception.
n. [L. jungere, to join]
An articulation of two successive segments or parts.
adj. [L. jubatus, crested]
Fringed with long, mane-like hairs.
The upper surface of a valve immediately adjacent to the jugum, sometimes sculptured differently from the rest of the surface; dorsal area.
The angle formed by the two halves of an intermediate valve.
Bristles located on the edge of the jugal lobe.
A lobe at the base of the fore wing that makes contact with the hind wing to prevent the wings from moving out of phase.
Thick longitudinal muscles at the base of the radular mass.
1. (ARTHROPODA: Crustacea)
In Decapoda, the anterolateral part on the ventral surface, located on opposite sides of the buccal cavity; pterygostomial region.
2. (ARTHROPODA: ...
A depression between the sutural laminae of chitins.
The tegmentum surface, adjacent to the jugum.
jugo-frenate wing coupling
Lepidoptera, wing coupling where the jugum is folded under the fore wings and holds the frenular bristles.
adj. [L. jugulum, collar bone, throat]
Of or pertaining to the throat.
n. [L. jugulum, collar bone, throat]
1. The median ventral plate of the head; see gula.
2. The jugum of the wing.
n.; pl. -ga [L. jugum, yoke]
The medial connection of the secondary shell between 2 primary lamellae of the spiralia.
2. (ARTHROPODA: Insecta)
a. In ...
adj. [ Julus, generic name; L. forma, shape]
Having a cylindrical trunk and fused tergites, pleurites, and sternites as in the order Julida.
The more currently published of two or more identical names for the same or different taxa; see homonym, senior homonym.
The more currently published of two or more available names for the same taxon; see synonyms, senior synonym.
adj. [L. juvenilis, young]
1. A nonscientific colloquial term used to denote any stage of development prior to adulthood.
2. Often restricted to that stage immediately ...
A hormone of larvae produced by the corpora allata that controls the way the larval cells differentiate at each molt.
n. [L. juxta, near]
1. In Diptera, an eversible membranous distal section of the male intromittent organ.
2. In male Lepidoptera, a sclerotized ...
n. [L. juxta, near; cardo, hinge]
An extension of the cardo from cardo proper toward the submentum.
In Ichneumonidae, an arched carina cutting off a lenticular area of the lower part of the metapleura; when complete, the carina arches between the ...
n. [L. juxta, near; positus, place]
A placing or being placed side by side.
n. [L. juxta, near; stipes, stalk]
An extension of the stipes toward the mentum.
Any species of organism using a survival and reproductive strategy characterized by low fecundity, low mortality, longer life, and having populations approaching the carrying ...
n. [Gr. kairos, fit; hormaein, to exite]
A chemical substance, produced or acquired by an organism, that upon contact with an individual of another species evokes a ...
n. [Gr. kalymma, hood]
Matrix material which is thought by some authors to surround the components of chromosomes.
adj. [Gr. karyon, nucleus; klastos, broken in pieces]
Agents that inhibit mitosis without killing the cell.
n. [Gr. karyon, nucleus; gamos, marriage]
The union of male and female nuclei during the process of syngamy.
n. [Gr. karyon, nucleus; kinesis, movement]
Nuclear division as opposed to cytokinesis.
n. [Gr. karyon, nucleus; lysis, a loosing]
Disappearance of the interphase nucleus at the beginning of karyokinesis; dissolution of the nucleus.
n. [Gr. karyon, nucleus; meros, part]
Any of a series of micronuclei formed in cells in which the chromosomes diverge at anaphase.
n. [Gr. karyon, nucleus]
The cell nucleus.
n. [Gr. karyon, nucleus; plasma, formed or molded]
The protoplasm of the nucleus; nucleoplasm.