The posterior conical region of the stomach, lined with cilia, but devoid of chitin.
n. [Gr. stylos, pillar]
1. Any small rigid bristle or needlelike appendage or organ.
2. (ARTHROPODA: Crustacea)
see caudal ramus.
3. (ARTHROPODA: Insecta)
One of the ...
Various thickenings (apodemes) at the base of the stylet, usually 3 in number, that serve as attachment points for the protractor muscles; see basal knobs.
In aculeate Hymenoptera, the dorsal part of the terebra.
n. pl. [Gr. stylos, piller; kytos, container]
Large epithelial cells in which the stylets are formed.
pl. of style and stylus.
adj. [Gr. stylos, pillar; L. fero, bear]
Having one or more styli.
adj. [Gr. stylos, pillar; L. forma, shape]
Shaped like a style or stylet; formed of parallel-sides and a pointed apex.
In Ephemeroptera, a sclerite on the posterior portion of sternum 9, variable in shape, which on the posterior margin gives rise to a pair of slender and ...
n. [Gr. stylos, pillar; keras, horn]
A rounded or spiniform process on the outer part of the proximal segment of the antennular peduncle; ...
n. [Gr. stylos, pillar; eidos, like]
A small, longer than wide, projection on the parapodium.
adj. [Gr. stylos, pillar; eidos, like]
Long and slender; belonoid; aciform.
n. [Gr. stylos, pillar; ops, eye]
The endoparasitism by the coleopterous female Strepsiptera (Stylops), of other insects; stylopized.
adj. [Gr. stylos, pillar]
Bearing a style or several styli.
n. [Gr. stylos, pillar; stoma, mouth]
In acarid Trombiculidae, a hard, tube-like structure formed by the host\'s tissues under the influence of ...
n.; pl. styli [Gr. stylos, pillar]
see style, stylet; a short slender, fingerlike process.
A sclerite behind the pleural process into which wing movement muscles are inserted.
adj. [L. sub, under; alternus, alternate]
Not quite opposite, yet not regularly alternate.
In Diptera, a facial groove that facilitates the scape.
In Diptera, the inner supporting ridge of the subantennal suture of Culicidae.
1. Sutures ventral to the antennal socket.
2. In Culicidae larvae, a short line laterally below the antennal prominence, associated with the ...
In the genitalia of male Culicidae, a mesal lobe found at or distal to the middle of the gonocoxite.
n. [L. sub, under; Gr. apo, from; tormos, socket]
In Scarabaeoidea larva, a heavily sclerotized process extending forward from the subtorma on each side ...
n. [L. sub, under; ad, to; socius, companion]
This term has been used by various authors as a substitute for the term association when not in agreement with the definition: ...
adj. [L. sub, under; Gr. basis, base]
Just distad of the base.
adj. [L. sub, under; bis, two; ramus, branch]
Parapodia in which the notopods are reduced and neuropods are well developed.
adj. [L. sub, under; Gr. branchia, gills]
Beneath the gills.
In Brachyura, the ventral part of the carapace beneath the gill area.
adj. [L. sub, under; capitalis, relating to the head]
In Acari, pertaining to the ventral surface of the infracapitulum.
In Acari, a sclerotized continuation of the mentum internally, to which several tendons are attached.
In anactinotrichid Acari, the median taenidium on the ventral surface of the infracapitulum; the deutosternum.
n. [L. sub, under; carina, keel]
In Lepadomorpha, a small, unpaired plate below the carina.
adj. [L. sub, under; carina, keel]
Shaped like a shallow keel.
n. pl. [L. sub, under; castus, pure]
In Hymenoptera, the various forms of mature Formicidae of a caste; see major worker, media worker, minor worker. ...
adj. [L. sub, under; cellula, small cell]
Applies to organelles in a cell.
adj. [L. sub, under; Gr. kephale, head]
Located posterior to the cephalic region.
n. [L. sub, under; Gr. chele, claw]
The distal end of a limb developed as a prehensile structure by the folding back of a dactyl against the ...
adj. [L. sub, under; Gr. chele, claw]
Having an appendage in which the terminal podomere that can fold back like a pincer against the subterminal ...
n. [L. sub, under; classis, division]
In classification, a major subdivision of a class, comprised of related orders.
n. [L. sub, under; Gr. klimax, ladder]
1. The stage preceding the climax in a complete sere.
2. A geographically smaller area than that of a \'climax\'.
n. [L. sub, under; colonia, farm]
A functional grouping within a colony, in which the skeletons may or may not be of the same structure.
n. [L. sub, under; costa, rib]
A longitudinal vein between the costa and the radius.
n. [L. sub, under; coxa, hip]
A secondary proximal subdivision of the coxopodite.
2. (ARTHROPODA: Crustacea)
1. (ARTHROPODA: Insecta)
Sclerites that are separated primitively or fused, that form the pleural support for the coxa.
2. (ARTHROPODA: Chilopoda)
Small, variously shaped ...
n. [L. sub, under; cutis, skin]
Newly secreted basal cuticle whose granular ultrastructure shows microfibrils that have not undergone orientation.
adj. [L. sub, under; dens, tooth]
Small teeth or notches.
The wing vein forming the posterior margin of the third discoidal cell.
adj. [L. sub, under; dorsum, back]
Pertaining to the sector between the dorsal and lateral surface; subdorsal n.
In caterpillars, a subdorsal longitudinal line between dorsal and lateral; if addorsal line present, between it and the lateral line.
In some Hymenoptera caterpillars, an elevated longitudinal line along the subdorsal row of abdominal tubercles.
A number of large binucleate cells in the body cavity closely associated with the inner end of the stomodeum in Orthoptera, Plecoptera, Isoptera, ...
n. [L. sub, under; familia, family]
A category of the family group containing related tribes or genera, and ending in -inae.
adj. [L. sub, under; fossor, digger]
Adapted for digging.
n. [L. sub, under; galea, helmet]
An inner sclerite of the maxillary stipes; parastipes; sometimes fused with the lacinia or merged into the ...
The narrow lateral marginal areas of the head setoff by the subgenal sulcus above the mandibles and maxillae.
A submarginal structure on the inner surface of the head arising from the subgenal sulcus.
The lateral suture below the gena, and above the base of the mandibles and maxillae.
A platelike sternite that underlies the genitalia, usually in the 9th abdominal sternum in males, and 7th or 8th in females; in some ichneumonid ...
A cordotonal organ situated in the proximal part of the tibia; when a two-part organ, the one more proximal is known as the "true subgenual organ.".
n.; pl. subgenera [L. sub, under; genus, tribe]
The name of an optional category between the genus and species; capitalized and placed in parentheses following the genus ...
In Decapoda, a narrow ridge extending posteriorly from the branchiostegal spine.
In Decapoda, that part on the ventral surface of the carapace below the hepatic region, bounded by the pterygostomial and suborbital regions.
n. [L. sub, under; imago, image]
In Ephemeroptera, the first of two winged instars after it emerges from the water surface, or underwater; subimaginal ...
Two or more synonyms based on different types, but recognized as referring to the same taxon by taxonomists who hold them to be synonyms.
adj. [L. sub, under; limen, threshold]
A stimulus insufficient or inadequate to illicit a perceptible response; see liminal.
1. A lake bottom too deep for rooted plants to grow.
2. In oceans, a zone from the intertidal zone to the end of the continental shelf.
adj. [L. sub, under; malleus, hammer]
A modified malleate mastax.
n. [L. sub, under; margo, margin]
One of the dorsal edges of the shell body which adjoins the lower border of the auricle in Pectinacea.
adj. [L. sub, under; margo, edge]
Placed within the margin.
In the hind wings, a section between the anterior (costal) margin and the first strong vein.
In Hymenoptera, one or more cells just behind the marginal cell.
In Coccidae, round tuberacles, when present, variable in number, surrounding a central invaginated tube, occurring in the dorsal submarginal area of the ...
In Chalcidoidea, a vein just behind and paralleling the costal margin of the wing.
In Hymenoptera, a cell behind the median cell, in the basal posterior of the wing.
In Stomatopoda, the small projection(s) just laterad of the midline on the terminal margin of the telson (medial to submedian teeth).
In Decapoda, a longitudinal groove in the submedian dorsal part of the carapace, contiguous with the postrostal carina.
In the superfamily Criconematoidea in Tylenchina, the paired, reduced, strongly modified subdorsal and subventral lips.
In Stomatopoda, the strong spinelike or blunt projection just laterad of the midline on the terminal margin of the telson.
In certain Hymenoptera, the lower margin of the lower division of the mesopleurum, between the bases of the middle and hind coxae.
n. [L. sub, under; mentum, chin]
1. The basal sclerite of a labium.
2. In some Coleoptera, a distinct sclerite defined by a suture intervening ...
adj. [L. sub, under; Gr. neuron, nerve]
Under the central nervous system or ventral nerve cord.
In smaller Ichneumonidae, a sharp groove extending from the base of the eye to the mandibular socket.
In Brachyura, a narrow region bordering the lower margin or orbit.
In a decapod carapace, a spine slightly below and posterior to the middle of the orbit.
n. [L. sub, under; Gr. phyle, tribe, race]
A major subdivision in classification between phylum and class.
n. [L. sub, under; quadri-, four; angulus, angle]
In odonatan Zygoptera, a cell just behind the quadrangle.
Two eversible pads, probably of chemoreceptive function, at the base of the subradular sac.
A blind sac of the posterior wall of the buccal cavity containing cushionshaped sensory structures (subradular organs) hanging from the roof.
n. [L. sub, under; rostrum, beak]
In Lepadomorpha Cirripedia, a single plate below the rostrum.
n. [L. sub, under; scaphium, hollow vessel]
In male Lepidoptera, a ventral sclerotization of the genitalia, below the anus; gnathos.
n. [L. sub, under; dim. scutum, shield]
In some Diptera, especially Tachinidae, the anterior region of the mediotergite differentiated as a convex, ...
n. [L. sub, under; socius, companion]
Applied to adults caring for their young for some period of time; see presocial.
n. pl. [L. sub, under; socius, companion]
A term used by various authors when there is disagreement as to the definition of the word associes.
n. [L. sub, under; species, kind]
A subdivision of a species inhabiting a geographic subdivision of the range of the species and differing taxonomically from other populations ...
A name proposed to replace a preoccupied name that assumes the same type and type-locality.
n. [L. sub, under; stratum, bed]
1. A substance on which an enzyme acts. 2; see substratum.
A local race selected by nature to have a similarity of coloration with that of the substratum.
n.; pl. substrata [L. sub, under; stratum, bed]
The ground or other surface in or upon which organisms live, walk, crawl or are attached.
n. [L. sub, under; sumere, to take]
To include under; to put under another as belonging to it, i.e., in zoological classification.
A transverse ridge near the upper edge of the mesopleurum, below the tegula and base of the front wing.
n. [L. sub, under; tegulum, covering]
In Arachnida, one of the sclerotized plates that protect the hematodocha of the male papal organ of some ...
n. [L. sub, under; Gr. tormos, socket]
In Coleoptera, the heavily sclerotized, transverse, curved process of certain Scarabaeoidea larvae, located near ...
n. [L. sub, under; tri, three; angulus, angle]
In Odonata Anisoptera, A cell or group of cells in the wing behind the triangle.
n. [L. sub, under; tribus, tribe]
In classification, a rank below the tribe and above the genus.
n. [L. sub, under; Gr. tylos, knot; style, pillar]
1. A monactinal megasclere with a sub-apical expansion.
2. A tylostyle with an indistinct knob at one end and ...
adj. [L. subula, awl]
Shaped like an awl; slender and tapering to a point, with sides convex.
n. [L. sub, under; dim. umbra, shade]
The concave oral surface of a medusa or jellyfish; see exumbrella.
In Diptera, the setae/setulae along the anteroventral margin of the gena.
adj. [L. sub, under; cingere, to gird]
Compact; contracted; reduced.
In social insects, a resting or hiding place constructed by workers, but not qualifying as a true nest due to the absence of brood rearing.
n. [A.S. sucan, to suck]
An organ creating a vacuum, utilized by various invertebrates for locomotion, ingesting or holding food, or adhering to the substrate.
adj. [L. sugere, to suck]
Having vacuum organs; adapted for sucking.
adj. [L. suffusus, to pour beneath]
To overspread, as with fluid or color; to cover the surface; suffusion n.
adj. [L. sugere, to suck]
adj. [L. sulcus, furrow]
Having a groove or furrow.
n. [L. sulcus, furrow]
1. Scored by furrows or grooves.
2. Encircled by channels.
n. pl. [L. sulcus, furrow]
Grooves of a purely functional origin, such as strengthening ridges of the head.
adj. [L. sulcus, furrow; forma, shape]
Being groovelike or groove-shaped.
n. [L. dim. sulcus, furrow]
In diglyphic Actiniaria, having the second, sometimes small, siphonoglyphs situated at the dorsal end of the pharynx; see ...
n.; pl. sulci [L. sulcus, furrow]
1. A furrow, groove or fissure.
2. (ARTHROPODA: Insecta)
A suture formed by an infolding of the body wall; see sulci.
A thin-shelled, rapidly developing egg; tachyblastic; see winter egg.
n. [L. summum, the highest point]
1. The apex; the top.
2. (MOLLUSCA: Bivalvia)
The highest dorsal point of the shell profile when the cardinal plane is horizontal.
n. [L. super, over; classis, a division]
In classification, above the class and below the phylum.
n. [L. super, over; familia, family]
In classification, above the family and below the order.
n. [L. super, over; genus, race]
In classification, above the genus and below the family.
In Odonata, lateral movable, paired appendages on the 9th or 10th abdominal segment; well developed in the males, reduced or vestigial in females.
n. pl. [L. super, over; lingua, tongue]
The two lateral lobes of the hypopharynx of adults; paragnath.
n. [L. super, over; dim. mas, male]
Abnormal male with one x-chromosome for 3 sets of autosomes in Drosophila.
In Cecidomyidae Diptera, a segment intercalated between the head and the prothorax.
Upper marginal plates that form the outline of the arm of sea-stars; see infero-marginal plates.
Sensory stimuli reponse stronger than the natural stimuli for which the response had been selected.
n. [L. super, over; ordo, order]
In classification, a group below class and above order.
n. [L. super, over; Gr. organon, organ]
A colony of social organisms, or organisms and their environment, of interdependent relationships which may be studied as though they ...
adj. [L. super, over; ponere, to place]
Placed one upon another; superimposed; placed directly over some other part.
In nocturnal or crepuscular arthropods, an eye that permits the passage of light through the non-pigmented wall of one ommatidium to the iris of a neighboring ...
A less distinct but brighter image due to the lens system focusing the light to the retina; see mosaic image.
n. [L. super, over; sedere, to sit]
In Hymenoptera, the replacement of an old or sick queen by a new queen in a honeybee colony.
n. [L. super, over; species, kind]
A monophyletic group of mainly or entirely allopatric species that are morphologically too different to be included in a single species or ...
n. [L. super, over; tribus, tribe]
In classification, below the subfamily and above the tribe.
n. [L. supplere, to fill up]
1. (ARTHROPODA: Insecta)
In Odonata, an adventitious vein formed by a number of crossveins lining up to form a continuous vein behind and more or ...
Secondary sexual characteristics along the body of male nematodes either sensory or glandular; see supplement.
In Isoptera, a queen or male, in the form of adultoid, nymphoid or ergatoid, that take over as a functional reproductive after the removal of the ...
adv. [L. supra, above]
In scientific terms, a prefix, denoting above or higher; on the dorsal side; opposite to infra.
In Diptera, a longitudinal row of bristles on the lateral portion of the mesonotum, above the root of the wing.
The reduced epiproct, below the posterior of the tenth tergum.
In Notostraca, usually tongue-shaped, but may be spatulate to rounded, plate situated posteriorly on the dorsal side of the telson.
A pedicle foramen in the ventral umbo away from the apex of the delthyrium.
adj. [L. supra, above; Gr. branchia, gills]
Above the gills.
In Acari, an extension of part of the tegulum above the chelicera of Gamasida.
n. [L. supra, above; Gr. neustos, able to swim]
Small animals living on the surface film of water.
adj. [L. supra, above; species, kind]
Applied to a category or evolutionary phenomenon above the species level.
In Diptera, a ridge between the base of the lower calypter to the anterolateral angle of the scutellum.
adj. [L. supra, above; A.S. tid, time]
Pertaining to the ocean; above the high tide mark; a subdivision of the neritic zone.
adj. [L. supra, above; anus]
Above the anus; supraanal.
A heavily sclerotized area on the dorsum of the last abdominal segment; a plate or lobe dorsad of the anus; epiproct; anal plate; see ectoproct. ...
A pheromone active only on or very close to the body; contact or near contact must be made.
Surface film on liquids caused by cohesion of the molecules of the liquid at the free surface.
surpedal area or lobe
In Hymenoptera, a lobe or area just above the prolegs and below and behind the spiracle on the abdomen of Symphyta larvae; suprapedal area; ...
n. pl.; sing. -lus [L. supra, over; Gr. stylos, pillar]
In Diptera, paired appendages of the ninth abdominal tergite (epandrium); suprastyli.
n. [L. sub, under; pendere, hang]
1. (ARTHROPODA: Insecta)
In Hymenoptera, a structure composed of carton or wax attaching the comb nests of bees and wasps.
2. (NEMATODA: ...
n.; pl. -ria [L. sub, under; pendere, to hang]
1. Anything that suspends a part.
2. (ARTHROPODA: Insecta)
a. In Blattoidea, a pair of linear sclerites extending toward the ...
Supporting cells of organs as differentiated from the cells that provide the function of the organ.
n. [L. sustinere, to sustain]
One of two hooks on the posterior part of a butterfly pupa; cremaster.
In Cirripedia, the margin of the compartmental plate along the suture.
Apophyses plates; anterior plate-like projections of the articulamentum extending from either side of an intermediate or tail valve; may be ...
Lamina of the articulamentum across the jugal sinus of the intermediate and tail valve, extending between the sutural laminae.
A horizontally flattened band that may contact the adapical suture of the whorls.
An angle between the suture and plane perpendicular to the axis; sometimes equated to the sutural angle.
n. [L. sutura, seam]
1. Line of junction of 2 parts generally immovably connected.
2. (ARTHROPODA: Crustacea)
In Cirripedia, a line or seam at the juncture of two ...
n. [A.S. swearm, swarm]
In social insects: a. The departure of a queen and workers from the parental nest to establish a new colony of highly ...
n. [A.S. swimman, to swim]
An abdominal appendage functioning as a swimming organ; pleopod.
Any bell or umbrella-shaped cnidarian that moves through the water by contractions, especially Siphonophora; nectocalyx; nectophore.
A short ridge bearing large fused cilia, arranged in eight meridional rows that function in locomotion.
The gene influencing the epigenotype to switch to a different developmental pathway.
n. [Gr. sykon, fig]
A sponge in which the choanocyte layer shows folding accompanied by superficial thickening of the mesohyl.
n. [Gr. syllektos, gathered together]
An aquiferous system transitional between syconoid and leuconoid conditions, with elongate choanocyte chambers grouped ...
n. [Gr. symbiosis, life together; logos, discourse]
The study of symbioses.
n. [Gr. symbiosis, life together; on, being]
Any organism that exists in a relationship of mutual benefit with another organism; a symbiote.
n. [Gr. symbiosis, life together]
1. The mutually beneficial living together of individuals of two different species.
2. Interrelationship of different species of organisms, ...
n. [Gr. symbiosis, life together]
An organism living in symbiosis; symbiont.
n. [Gr. symmetria, due proportion]
The mode of body organization; symmetical a; see bilateral symmetry, radial symmetry.
1. That portion of the autonomic nervous system directly connected with the brain and innervating the fore and middle intestine, heart and certain other parts.
Speciation with geographic isolation; the reproductive isolation occurring between segments of a single population.
n. [Gr. syn, together; patria, native country]
The occurrence of two or more populations in the same area; usually referring to areas of overlap in species distributions.
n. [Gr. syn, together; philein, to love]
A symbiont that is accepted by a host colony as a member of their group and is licked, fed, protected, ...
n. [Gr. syn, together; philein, to love]
In Hymenoptera, the relationship of ants and their nest guests, that abide with them, with mutual benefit or ...
adj. [Gr. symphysis, junction, seam; notos, back]
Having the valves firmly fixed or soldered at the hinge.
n. [Gr. symphysis, junction, seam]
A union between two parts.
n. [Gr. syn, together; plesios, near; morphe, form]
Shared primitive homologous character states; normally used in cladistic taxonomy; see plesiomorphy.
n. [Gr. symptoma, anything that has befallen one; logos, discourse]
A branch of medical science concerned with symptoms of diseases.
n. [Gr. syn, together; anthropos, man]
The propensity of an organism to live in or around human dwellings.
n. [Gr. syn, together; apo, separate; morphe, form]
The sharing of derived characters by several species; see plesiomorphy.
The central mechanism of intercommunication of nerve impulses passing from neuron to neuron; synaptic adj..
n.; pl. -ses [Gr. synapsis, union]
The intimate conjunction of homologous chromosomes that occurs during the prophase of the meiotic division.
n. [Gr. synapsis, union]
The zygotene of meiosis.
Swellings on the axon ends where contact is made with dendrites of another nerve cell.
n.; pl. -la [Gr. synapsis, union]
One of numerous conical or cylindrical calcareous processes connecting the septa; synapticular adj..
Organelle present during pachytene stage of eukaryote meiosis visable in electron micrographs.
adj. [Gr. synapsis, union; rhabdos, rod]
Pertaining to ctenidia where filaments are connected at their interlamellar edges by strands of cellular ...
n. [Gr. syn, together; apo-, away from; ptychos, fold]
Double calcareous plates fused with other paired plates; see anaptychus.
n. [Gr. syn, together; L. cerebrum, brain]
The supraesophageal glanglia or brain of many invertebrates.
n. [Gr. syn, together; chronos, time]
An environmental factor that influences the phenomena of circadian rhythm to conform to a daily cycle instead of wandering.
n. [Gr. syn, together; keros, chance; bios, life]
In Hymenoptera, a temporary association of two species of ants of independent colonies.
A grade of construction intermediate between the asconoid and the leuconoid, in which each radial canal is subdivided into elongate-flagellate chambers grouped ...
n. [Gr. syn, together; kytos, container]
A polyploid or multinucleate cell.
n.; pl. syncytia [Gr. syn, together; kytos, container]
A continuous mass of protoplasm with several or many nuclei; a multinucleate cell; syncytial adj..
n. [L. syndesis, a binding together]
1. Binding together.
3. A membrane connecting two separate parts permitting movement between them.
n. [Gr. syn, together; diakonos, servant]
A form of commensalism between ants and plants with both obtaining benefit.