Слова на букву root-spir (732) Dictionary of invertebrate zoology
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Слова на букву root-spir (732)

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rooting tuft
(PORIFERA) An aggregate of spicules protruding from the lower surface with root functions.
ropalocercous cercaria
see rhopalocercous cercaria.
rosaceous
adj. [L. rosa, rose] Having a quality of a rose, such as color or scent.
rosette plate
(BRYOZOA: Gymnolaemata) In Cheilostomata, multiporous, subcuticular area in the verticle walls for passage of fibers between zooids; multiporous septulum.
rosettes
n. pl. [L. dim. rosa, rose] 1. A process resembling a rose in shape, applied to organs or markings of many invertebrates. 2. (BRYOZOA) The clubbed-shaped cells of the ...
rostel
see rostellum.
rostellar
См. rostellate.
rostelliform
adj. [L. rostellum, small beak; forma, shape] Shaped like a rostellum.
rostellum
n. [L. rostellum, small beak] 1. A small beak or rostrum. 2. (ARTHROPODA: Insecta) The tubular piercing and sucking mouth parts. 3. (BRACHIOPODA) Low projection between ...
rostrad
adv. [L. rostrum, beak] Toward the anterior end; cephalad; toward the rostrum when anterior.
rostral filaments
see rostralis.
rostral incisure
(ARTHROPODA: Crustacea) In Ostracods, a gap between the rostrum in the anterior margin of the valve allowing for protrusion of the antenna (second antenna); rostral ...
rostral latus
(ARTHROPODA: Crustacea) In Lepadomorph branacles, a plate on each side of the rostrum or below the scutum; see rostrolateral.
rostral notch
see rostral incisure.
rostral plate
(ARTHROPODA: Crustacea) In malacostracan Phyllocarida, the anteriorly projecting, movably articulated, median extension of the carapace.
rostral tooth
(ARTHROPODA: Crustacea) On a Decapoda carapace, a tooth on the rostrum, may be single or multiple, with the upper, lower and lateral teeth distinguished.
rostralis
n. [L. rostrum, beak] (ARTHROPODA: Insecta) In Coccoidea, the modified mandibles and maxillae that pass through the rostrum into the host plant.
rostrate
adj. [L. rostrum, beak] Having a rostrum or beak-like process.
rostriform
adj. [L. rostrum, beak, forma, shape] Having the form of a beak.
rostrolateral
(ARTHROPODA: Crustacea) In balanomorph barnacles, one of a pair of compartmental plates overlapping on each side of the rostrum, sometimes overlap is fused with the rostrum ...
rostrulum
n. [L. dim. rostrum, beak] A small beak or rostrum.
rostrum
n.; pl. -tra [L. rostrum, beak] 1. A beak or snout; see rostellum. 2. (ARTHROPODA: Chelicerata) The labrum of spiders. 3. (ARTHROPODA: Crustacea) The median pointed ...
rotate
v.i. [L. rota, wheel] To turn; to revolve; to turn around on its own center or axis.
rotation
n. [L. rota, wheel] Turning around an axis.
rotelliform
adj. [L. dim. rota, wheel; forma, shape] (MOLLUSCA: Gastropoda) Almost lenticular, but with a low obtuse spire; see umboniform.
Rotifera
См. rotifers.
rotifers
n.; n. pl. [L. rota, wheel; fero, bear] A phylum of aquatic pseudocoelomate animals, many with an anterior ciliated corona that looks like a rotating wheel; wheel ...
rotundate
adj. [L. rotundus, round] Rounded; nearly circular; rounded at the angles, sides, or ends.
round dance
(ARTHROPODA: Insecta) In Hymenoptera, a dance of bees indicating a source of food close to the hive.
royal cell
(ARTHROPODA: Insecta) 1. In Isoptera, a small pearshaped chamber in which the termite queen lays her eggs. 2. In Hymenoptera, the large, oblong, waxen cell constructed by ...
royal jelly
(ARTHROPODA: Insecta) In Hymenoptera, a complex material secreted by the pharyngeal salivary glands of the worker honey bee with proteolytic activity, rich in fatty acids, ...
royal pairs
(ARTHROPODA: Insecta) In social insects, the sexually active males and females.
rubescent
adj. [L. rubescere, to grow red] Being reddish, or becoming red.
rubiginose
См. rubiginous.
rubiginous
adj. [LL. rubiginosus, rusty] Being rusty or brownish red; rust-colored.
rubineous
adj. [L. ruber, red] Ruby-like in appearance.
rudiment
n. [L. rudis, rough] The beginning of a structure or part; see anlage, precursor.
rudimentary
n. [L. rudimentum, a beginning] An incomplete stage of development; initial; early; undeveloped; see vestigial.
ruffles
n. pl. [ME. ruffeln] (MESOZOA: Rhombozoa) In Dicyemida, slender projections of the exterior surface.
rufous
adj. [L. rufus, red] Being reddish, red-yellowish; rufescent.
ruga
n. [L. ruga, wrinkle] A wrinkle, fold or crease; rugose adj..
rugosissimus
adj. [L. rugosus, full of wrinkles; -issimus, very] Being extremely rugose or wrinkled.
rugosity
n. [L. rugosus, full of wrinkles] The condition of being rugose or corrugated.
rugula
n.; pl. -lae [L. dim. ruga, wrinkle] A small wrinkle.
rugulose
adj. [L. dim. rugosus, full of wrinkles] Having fine wrinkles.
runcinate
adj. [L. runcinare, to plane off] Notched; in several transverse acute segments inclined backward.
rutella
n. pl.; sing. rutellum [L. dim. rutrum, shovel] (ARTHROPODA: Chelicerata) In Acari, paired hypertrophied setae on the subcapitulum, thick, hard and dentate, associated with ...
rutilous
adj. [L. rutilus, red, golden red] Of a shining bronze red color.
rypophagous
see rhypophagous.
sabulose
adj. [L. sabulum, sand] Sandy, gritty.
sabulous
См. sabulose.
sac
n. [L. saccus, bag] A bladder, pouch or bag-like structure.
saccate
adj. [L. saccus, bag] Sac-shaped; gibbous or inflated at one end.
saccharobiose
n. [Gr. sakchar, sugar; bios, life] Sucrose.
sacciform
adj. [L. saccus, bag] Having the shape of a sac or pouch; saccular.
saccule
n. [L. dim. saccus, bag] 1. A small sac or pouch. 2. Sometimes applied to a small invagination of the cuticle.
sacculus
n. [L. dim. saccus, bag] (ARTHROPODA: Insecta) In Lepidoptera, the inner basal process of the coxite of male external genitalia.
saccus
n. [L. saccus, bag] (ARTHROPODA: Insecta) In Lepidoptera, an internal, midventral, cephalad invagination of the vinculum.
sacoglossa
n. [Gr. sakos, shield; glossa, tongue] (MOLLUSCA: Gastropoda) In Opisthobranchia, having a single toothed radula.
saddle
n. [A.S. sadol] 1. (ANNELIDA: Oligochaeta) In Lumbricidae, the clitellum incomplete ventrally, extending from the back to below the lateral setae. 2. (ARTHROPODA: Insecta) ...
Saefftigen's pouch
(ACANTHOCEPHALA) An elongate genital pouch of males inside the genital sheath, continuous with the spaces of the bursal cap, that functions to inject fluid for eversion of ...
sagittae
see penis valves.
sagittal
adj. [L. sagitta, arrow] Of or pertaining to the vertical median anteroposterior plane in a bilaterally symmetrical animal; see parasagittal.
sagittal triact
(PORIFERA) A three-rayed megasclere spicule having one ray very unlike others, generally T-shaped.
sagittal triradiates
(PORIFERA) Tetraxon spicules with two equal angles and one dissimilar angle; see triradiate(s) .
sagittate
adj. [L. sagitta, arrow] Having the shape of an arrowhead; sagittiform.
sagittocysts
n. [L. sagitta, arrow; Gr. kystis, bladder] (PLATYHELMINTHES: Turbellaria) Pointed vesicles with a protrusible rod or needle.
salient
adj. [L. saliens, leaping] Projecting outward; prominent.
saliva
n. [L. saliva, spit] The secretion of the salivary glands that moisten the mouth parts, the food, and begins digestion; in many invertebrates it also contains active ...
salivarium
n. [L. saliva, spit] 1. (ARTHROPODA: Chelicerata) In Acarina, the chamber in the buccal cone into which the salivary ducts open. 2. (ARTHROPODA: Insecta) The small ...
salivary canal
(ARTHROPODA: Insecta) 1. In Hemiptera, the mouth apparatus having separate food and salivary canals; the posterior of the two situated between the opposed styliform ...
salivary chromosomes
(ARTHROPODA: Insecta) In Diptera, polytene chromosomes found in the interphase nuclei of the salivary glands of the larvae.
salivary ducts
(ARTHROPODA: Insecta) In Diptera, tubes through which saliva passes from the salivary glands; anteriorly fused forming the common salivary duct opening into the salivary ...
salivary gland
1. (ARTHROPODA: Insecta) Glands that open into the mouth, esophagus or at the beginning of the alimentary canal, that secrete a digestive substance; see labial gland, ...
salivary pump
(ARTHROPODA: Insecta) A modified salivarium into which the common salivary duct opens at the base of the hypopharynx.
salivary syringe
see salivary pump.
saltation
n. [L. saltare, to leap] An evolutionary process that proceeds by leaps and bounds through the production of mutants that differ greatly from the progenitor(s); see ...
Saltatoria
n. [L. saltare, to leap] A name commonly misapplied to grasshoppers, crickets and their allies.
saltatory
adj. [L. saltare, to leap] Adapted for leaping; see furcula.
saltigrade
adj. [L. saltare, to leap; gradus, step] Leaping movement as in insects and spiders.
salvary gland
(MOLLUSCA: Gastropoda) In predacious Prosobranchia, a gland producing a sulfuric acidcontaining secretion that is injected into its victim.
sanguine
adj. [L. sanguis, blood] Having the color of blood.
sanguinivorous
adj. [L. sanguis, blood; vorare, to devour] Feeding on blood.
sanidasters
n. pl. [Gr. sanidion, small board; aster, star] (PORIFERA) Rod shaped streptasters; a small rod-like spicule with spines at intervals.
sapphirine
adj. [Gr. sappheiros, sapphire] Sapphire blue.
saprobe
see saprobiont.
saprobic
adj. [Gr. sapros, rotten] Living on decaying organic matter.
saprobiont
n. [Gr. sapros, rotten; bios, life] Living in an environment rich in decaying organic matter and low in oxygen.
saprophagous
adj. [Gr. sapros, rotten; phagein, to eat] Feeding on dead or decaying animal or plant materials.
saprophyte
n. [Gr. sapros, rotten; phyton, plant] A plant that lives on dead and decaying organic matter; sometimes incorrectly extended to include animals as well as plants.
saprophytic
a; see saprozite.
saprozoic nutrition
1. Feeding on decaying organic matter. 2. Deriving sustenance by absorption of dissolved salts and simple organic nutrients from surrounding medium.
saprozoite
n. [Gr. sapros, rotten; zoon, animal] An animal that lives on dead or decaying organic matter; see saprophyte.
sarcobelum
n. [Gr. sarx, flesh; belos, sting] (MOLLUSCA: Gastropoda) In Pulmonata, a glandular node projecting into the prepuce from the junction of the penis sheath and propuce.
sarcode
n. [Gr. sarx, flesh] Protoplasm.
sarcolemma
n. [Gr. sarx, flesh; lemma, covering] An outer membrane enclosing the nucleated sarcoplasm in which the muscle fibers are embedded.
sarcolysis
n. [Gr. sarx, flesh; lyein, to loosen] Phagocytosis of muscles.
sarcolyte
n. [Gr. sarx, flesh; lytos, broken] (ARTHROPODA: Insecta) In Diptera, spherical bodies filled with muscle fragments in the blood of the pupae during metamorphosis.
sarcomere
n. [Gr. sarx, flesh; meros, part] Any one of a series of units occurring at regular intervals along a muscle fiber, each unit encompasses the actin and myosin filaments; in ...
sarcomeric
a; see I-bands, T-tubule.
sarcophagous
adj. [Gr. sarx, flesh; phagein, to eat] Feeding on flesh.
sarcoplasm
n. [Gr. sarx, flesh; plasma, formed or molded] The undifferentiated protoplasm of a muscle cell; between the myofibrils.
sarcoplasmic reticulum
Endoplasmic reticulum in striated muscle fibers; surrounding the myofibrils.
sarcosomes
n. [Gr. sarx, flesh; soma, body] Former name for mitochondria in muscle cells.
sarcostyle
n. [Gr. sarx, flesh; stylos, pillar] (CNIDARIA: Hydrozoa) The dactylozooid on a column; nematophore.
sarcotheca
n. [Gr. sarx, flesh; theke, case] (CNIDARIA: Hydrozoa) The sheath of a sarcostyle; nematotheca.
sarothrum
see scopa.
saw
n. [A.S. sagu, saw] (ARTHROPODA: Insecta) a. In Symphyta, transverse ridges provided on the fused 2nd valvulae. b. In Diptera, the anterior serrated plate of the spiracular ...
saw bristles
(ARTHROPODA: Crustacea) A heavy row of setae between the molar and incisor process on the gnathal lobe of the mandible.
saxicavous
adj. [L. saxum, rock; cavus, hollow] Said of rockboring mollusks.
saxicolous
adj. [L. saxum, rock; colere, to inhabit] Living among rocky or stony areas.
scabellum
n. [L. scabellum, footstool] (ARTHROPODA: Insecta) In Diptera, the distal basal portion of the halteres.
scabrous
adj. [L. scaber, rough] Rough; rugged; with little rigid points or minute irregularities.
scalariform
См. scalaroid.
scalaroid
adj. [L. scalaris, ladder; forma, shape] Ladder-like; having transverse bars and spaces like a ladder.
scales
n. pl. [OF. escale, husk] 1. A small, more or less flattened, plate-like exterior covering. 2. (ARTHROPODA) a. In Chelicerata, flattened, modified setae of Arachnida. b. In ...
scalids
n. pl. [Gr. skalidon, hoe] 1. (KINORHYNCHA) Circlets and longitudinal rows of spines on the protrusible cone-shaped head and neck. 2. (LORICIFERA) In Nanaloricus ...
scalloped
adj. [OF. escalope, shell] Indented, cut at the edges into rounded hollows or segments of circles; crenate.
scalp
n. [Dan. skalp, shell] (MOLLUSCA) A bed of shellfish, especially of mussels or oysters.
scalpellum
see lancet.
scalpriform
adj. [L. scalprum, chisel; forma, shape] Chiselshaped.
scanning electron microscope
(SEM) A microscope with an electron beam that scans the specimen producing an image of the surface on a florescent screen.
scansorial
adj. [L. scandere, to climb] Adapted for climbing or clinging.
scape
n. [L. scapus, shaft] 1. A stem or shaft. 2. (ARTHROPODA: Chelicerata) A structure associated with the epigynum of some female Arachnida, partially covering the vulva. ...
scaphe
n. [Gr. skaphe, boat] (ANNELIDA: Polychaeta) In Amphictenidae, a flattened caudal appendage bearing the anus.
scaphiform
См. scaphoid.
scaphium
n. [Gr. skaphe, boat] 1. A boat-shaped structure. 2. (ARTHROPODA: Insecta) In male Lepidoptera, a dorsal sclerotization of the genitalia, below the uncus, and above the ...
scaphocerite
n. [Gr. skaphe, boat; keras, horn] (ARTHROPODA: Crustacea) The flattened exopod of the antenna; a scale; a squama.
scaphognathite
n. [Gr. skaphe, boat; ganthos, jaw] (ARTHROPODA: Crustacea) In Decapoda, the exopod of the maxilla, often used to produce the respiratory current in the gill chamber; ...
scaphoid
adj. [Gr. skaphe, boat] Boat-shaped.
Scaphopoda
n. [Gr. skaphe, boat; pous, foot] A class of Mollusca containing the tusk or tooth shell that are bilaterally symmetrical with an elongate, gently curved, tubular shell open ...
scapula
see parapsis.
scapulus
n.; pl. -li [L. dim. scapus, stem] 1. (CNIDARIA: Anthozoa) In Actinaria, the short upper part of the scape/scapus. 2. (NEMATA) The enlarged sensory portion of a ...
scapus
see scape.
scarabaeiform larva
(ARTHROPODA: Insecta) A grublike larva with a well sclerotized head, and poorly sclerotized body, but well developed thoracic legs and abdomen, without prolegs, and is ...
scarabaeoid
adj. [L. scarabaeus, beetle; Gr. eidos, like] 1. Scarab-like. 2. (ARTHROPODA: Insecta) In Coleoptera, a member of the Scarabaeoidea; third and fourth instar larva of the ...
scarified
adj. [L. scarifico, to scratch] To scratch or cut.
scariose
adj. [F. scarieux, membranous] Thin, dry and scaly.
scatophagous
adj. [Gr. skatos, dung; phagein, to eat] Eating dung or excrement; merdivorous; coprophagous.
scavenger
n. [ME. skavawer, collector of a toll] Any organism that feeds on dead plants or animals and decaying matter or animal wastes.
scent brush
См. scent tuft.
scent glands
(ARTHROPODA: Insecta) Glands that manufacture and store for subsequent release, volatile, usually highly odoriferous substances; see brush organs, pheromone.
scent pore
see ostiole.
scent scales
(ARTHROPODA: Insecta) Scales distinguished from clothing scales by their extreme length, sometimes called hairs; see androconia.
scent tuft
Hairs or scales that function in diffusion of odorous secretions.
sceptrules
n. [Gr. dim. skeptron, royal staff] (PORIFERA: Sclerospongiae) Microscleric monactinal triaxonic spicules that include clavules with terminal umbels or smooth heads.
schemochrome
n. [Gr. schema, shape; chroma, color] (ARTHROPODA: Insecta) Colors produced by physical or structural surfaces, devoid of pigment, as the iridescent colors of a butterfly ...
schistosomula
n.; pl. -lae [Gr. schizein, split; dim. soma, body] (PLATYHELMINTHES: Trematoda) In Schistostomatidae, the postpenetration stage in the vertebrate definitive host; the ...
schizeckenosy
n. [Gr. schizien, to split; eckenos, empty out] (ARTHROPODA: Chelicerata) In Acari, a system of waste elimination with blindly ending midgut by a lobe from the ...
schizocele
n. [Gr. schizein, to split; koilos, hollow] A coelomic cavity formed from the splitting of the mesodermal band or plate.
schizochroal
n. [Gr. schizien, to split; chroa, superficial appearance] (ARTHROPODA: Trilobita) Bound isolated lenses that form around semicircular facets; see holochroal.
schizocoel
См. schizocele.
schizodont
adj. [Gr. schizein, to split; odous, tooth] (MOLLUSCA: Bivalvia) With a two cusped-tooth.
schizogamy
n. [Gr. schizein, to split; gamos, marriage] (ANNELIDA: Polychaeta) Fission into a sexual and an asexual individual.
schizogenesis
see fission.
schizolophe
n. [Gr. schizein, to split; lophos, crest] (BRACHIOPODA) A lophophore indented to form a pair of branchia bearing a row of paired filamentous appendages; schizolophous ...
schizopeltid
n. [Gr. schizein, to split; pelte, shield] (ARTHROPODA: Chelicerata) The prodorsal shield (peltidium) subdivided by one or more transverse scissures, composed of ...
schizopod larva
see mysis stage.
schizorhyses
n. pl. [Gr. schizein, to split; rhysos, delivering] (PORIFERA) Canals in the dictyonal framework that runs longitudinally or obliquely from gastroderm to the dermis and are ...
Schmidt's layer
(ARTHROPODA: Insecta) The zone of deposition of new cuticle during molting; the exact nature of this zone is not known.
Schwann cell
(ARTHROPODA: Insecta) An elongate cell into which motor axons sink and become suspended by a suspensory fold; lemnoblast; neurilemma cell.
scientific name
The formal nomenclatural designation of a taxon.
scissorial area
(ARTHROPODA: Insecta) In Coleoptera, the cutting area on the mandible of a Scarabaeoidea larva; between the dentes and molar area.
scissure
n. [L. scindere, to cut] 1. A cleft or split in a body or surface. 2. (ARTHROPODA: Chelicerata) In Acari, a relatively narrow band of soft skin that cuts the sclerotized ...
sclerification
see sclerotization.
sclerite
n. [Gr. skleros, hard] 1. (ARTHROPODA) Any sclerotized area of cuticle limited by suture lines or flexible, membranous portions of cuticle. 2. (BRYOZOA) A thickened line ...
scleritization
n. [Gr. skleros, hard; facere, to make] (ARTHROPODA: Insecta) The formation of sclerites.
scleroblasts
n. pl. [Gr. skleros, hard; blastos, bud] (PORIFERA) Special amoebocytes in sponges responsible for secreting the skeleton; consisting either of spicules, fibers of spongin ...
sclerocyte
n. [Gr. skleros, hard; kytos, container] (PORIFERA) Cells that secrete spicules.
sclerophagous
see duraphagous.
sclerosepta
n. pl.; sing. -um [Gr. skleros, hard; septum, partition] (CNIDARIA: Hydrozoa) Calcareous rods of corals projecting from the basal plate in a fan-like shape between the ...
sclerotin
n. [Gr. skleros, hard] (ARTHROPODA) A colorless or quinone tanned amber or brown material occurring in the cuticle that accounts for much of the stiffening of the surface ...
sclerotization
n. [Gr. skleros, hard] Hardening by deposition of sclerotin or other substances in the cuticle; sclerotic, sclerotized adj.
scoleces
pl. of scolex.
scolecid
См. scolecoid.
scoleciform
См. scolecoid.
scolecoid
adj. [Gr. skolex, worm] Scolex-like.
scolex
n. [Gr. skolex, worm] (PLATYHELMINTHES: Cestoda) The head or holdfast organ.
scolopale
n.; pl. -ia [Gr. skolos, pointed object; L. palus, stake] (ARTHROPODA: Insecta) A variously shaped cup or cone with longitudinal ridges and a central filament connecting ...
scoloparium
see proprioceptor.
scolophore
n. [Gr. skolos, pointed object; phoreus, bearer] (ARTHROPODA: Insecta) 1. Complex sensilla consisting of a bundle of sensory cells whose endings are separated from the ...
scolopidium
n.; pl. -ia [Gr. dim. skolos, pointed object] A mechanoreceptor (part of a chordotonal organ) consisting essentially, of three cells: sensory neuron (scolopale), enveloping ...
scolopoid sheath
see scolopale.
scolopophore
См. scolophore.
scolopophorus organ
see chordotonal organ.
scolops
see scolopale.
scolus
n.; pl. scoli [Gr. skolos, pointed object] 1. Thorny processes of the body-wall. 2. (ARTHROPODA: Insecta) a. In Coleoptera, long branched projection of coccinellid beetles. ...
scolytoid larva
(ARTHROPODA: Insecta) A fleshy larva resembling the larva of scolytid beetles.
scopa
n.; pl. -ae [L. scopa, broom] (ARTHROPODA: Insecta) In Hymenoptera, special hairs (pollen brush) or modified to form a corbicula (pollen basket); scopate adj..
scopiform
adj. [L. scopa, broom; forma, shape] Formed like a brush.
scopula
n.; pl. -ae [L. dim. scopa, broom] A small, dense tuft of hair; scopa.
scopules
n. pl. [L. dim. scopa, broom] (PORIFERA) Sceptrules with few spines arranged in a regular cluster.
scopuliferous
См. scopuliform.
scopuliform
adj. [L. dim. scopa, broom] Brushlike.
scopulipedes
adj. [L. dim. scopa, broom; pes, foot] (ARTHROPODA: Insecta) In Hymenoptera, bees with pollen gathering structures on the feet.
scotopic
see superposition eye.
scraper
n. [A.S. scrapian, scraper] 1. Any structure or specialized part of a structure adapted for rasping or scraping. 2. (ARTHROPODA: Insecta) In Orthoptera, the sharpened anal ...
screening
adj. [OF. escren, barrier] Selective procedures to isolate animals or chemicals from populations, complex mixtures, or background material.
screw dislocation
(BRYOZOA) Spiral growth resulting from lattice defects in calcite crystals making up their skeletal units.
scrobe
n. [LL. scrobis, ditch] A groove or furrow for the reception of an appendage.
scrobicula
n. [LL. dim. scrobis, ditch] (ECHINODERMATA: Echinoidea) A bare area surrounding a boss (base of a spine) on the test; areola.
scrobicular tubercles
(ECHINODERMATA: Echinoidea) Secondary tubercles with spines encircling the base of a spine on the test.
scrobiculate
adj. [LL. dim. scrobis, ditch] Marked with pits or hollows.
scrobicules
n. [LL. dim. scrobis, ditch] (ECHINODERMATA: Echinoidea) Small secondary spines on the scrobicular tubercles of the test.
scrobiculus
n. [LL. dim. scrobis, ditch] A pit or depression.
scrobis
n.; pl. -es [LL. scrobis, ditch] (ARTHROPODA: Insecta) In Scarabaeoidea larvae, a sunken lateral mandibular region defined by two apically converging lateral carinae.
scrotal membrane
(ARTHROPODA: Insecta) The peritoneal envelope covering the testes; sometimes pigmented.
scrotiform
adj. [L. scrotum, pouch; forma, shape] Purse- or pouch-shaped.
scrotum
see scrotal membrane.
sculpture
n. [L. sculptura, carving] The pattern or marking of impressions or elevations on the surface of an animal.
scutal angle
(ARTHROPODA: Insecta) In Diptera, an angular projection of the scutal margin anterior to the prescutal suture, or in front of the prespiracular area.
scutal margin
(ARTHROPODA: Crustacea) In thoracic barnacles, the edge of the tergum, articulating with the scutum or the edge of any other plate adjacent to the scutum.
scutate
adj. [L. scutum, shield] In the shape of a shield; escutcheon; clypeate; peltate.
scute
n. [L. scutum, shield] (ARTHROPODA: Insecta) An external scale.
scutel
see scutellum.
scutellar angle
(ARTHROPODA: Insecta) The expanded wing angle of the elytra adjacent to the scutellum.
scutellar bridge
(ARTHROPODA: Insecta) In Diptera, a ridge on both sides of the scutellum connecting with the scutum.
scutellar bristles
(ARTHROPODA: Insecta) In Diptera, bristles along the posterior margin of the scutellum.
scutellate
adj. [L. dim. scutum, shield] Divided into small platelike areas.
scutellum
n.; pl. scutella [L. dim. scutum, shield] 1. (ARTHROPODA: Insecta) a. A sclerotic subdivision of the thoracic notum. b. In Coleoptera, Hemiptera, and Homoptera, the ...
scutiform
adj. [L. scutum, shield; forma, shape] In the shape of a shield; peltate.
scutigerous
adj. [L. scutum, shield; gerere, to bear] Having a shield-like structure.
scutoscutellar suture
(ARTHROPODA: Insecta) The sulcus dividing the mesonotum into the scutum and scutellum; V of Vshaped sulcus with arms diverging posteriorly.
scutulis
see scutellum.
scutum
n.; pl. scuta [L. scutum, shield] 1. Any long, horny or chitinous plate. 2. (ARTHROPODA: Chelicerata) In Acari, the large, anteriodorsal sclerite. 3. (ARTHROPODA: ...
scyphistoma
n. [Gr. scyphos, cup; stoma, mouth] (CNIDARIA) A jellyfish polypoid larval stage attached to the bottom that gives rise to free-swimming medusae; a strobila; see ...
scyphomedusae
see Scyphozoa.
Scyphozoa
См. scyphozoans.
scyphozoans
n.; n. pl. [Gr. scyphos, cup; zoon, animal] An exclusively marine class in the Phylum Cnidaria, in which the medusoid stage predominates having 8 notches in the margin of ...
sealing bar
(ARTHROPODA: Insecta) In eggs, a structure formed from a thin layer of resistant endochorion and a thick amber layer that joins the cap to the rest of the chorion.
seam
n. [A.S. seam] A visible line of juncture between parts; a suture.
seam cells
(NEMATA) The central cell row in the lateral chords that have no membranous extension beneath the cuticle.
sebaceous
adj. [L. sebaceus, tallow] Pertaining to secretion, or composed of oily or fatty substances.
sebific duct
См. sebific gland.
sebific gland
Tubes of the collaterial glands.
sebific glands
1. (ARTHROPODA: Crustacea) Single or paired glands of certain females or hermaphrodites that produce a sticky substance for binding eggs together. 2. (ARTHROPODA: Insecta) ...
secereneteans
n.; n. pl. [L. secernere, to separate] One of the two major classes of the Phylum Nemata, including most of the plant- and animal-parasitic nematodes; formerly Phasmidia; ...
Secernentea
См. secereneteans.
second antennae
(ARTHROPODA: Crustacea) 1. Antennae of the second cephalic segment. 2. Antennae of some males are uniramous; two-jointed structures used to clasp females during mating.
second axillary
(ARTHROPODA: Insecta) 1. A sclerite articulating partly with the preceding sclerite and partly with the base of the radius; submedia. 2. An articulation sclerite of an ...
second longitudinal vein
see second vein.
second maxillae
1. (ARTHROPODA: Chilopoda) The fourth pair of head appendages. 2. (ARTHROPODA: Crustacea) The fifth and last pair of head appendages. 3. (ARTHROPODA: Insecta) The third ...
second trochanter
(ARTHROPODA) The second segment of the leg; prefemur; ischiopodite.
second valvifers
(ARTHROPODA: Insecta) In the ovipositor, a basal pair of lobes or oblong plates supporting the base of the second valvulae.
second valvulae
(ARTHROPODA: Insecta) In the ovipositor, a dorsal elongate pair of processes, uniting to form the sting sheath enclosing the 1st valvulae.
second vein
(ARTHROPODA: Insecta) In Diptera, when present, lying immediately behind the subcostal vein, always united with the radial sector vein.
second-form reproductive
see nymphoid reproductive.
secondary fiber
(PORIFERA) A fiber that connects primary fibers and is not oriented to the surface.
secondary host
see intermediate host.
secondary intergradation
The intergradation or hybridization of two distinct and previously isolated populations that have reestablished contact; see primary intergradation.
secondary iris cells
see accessory pigment cells.
secondary ocelli
(ARTHROPODA: Insecta) Ocelli of the larvae of holometabolous insects; lateral ocelli.
secondary pigment cells
see accessory pigment cells.
secondary pleometrosis
(ARTHROPODA: Insecta) In Hymenoptera, a process in a colony in which a founding queen is later joined by others to form a pleometrotic association; see pleometrosis.
secondary reproductive
see nymphoid reproductive.
secondary riblet
(MOLLUSCA: Bivalvia) A riblet appearing later in development, however, weaker than primary riblets.
secondary segmentation
Any form of body segmentation not conforming with the embryonic metamerism.
secondary setae
(ARTHROPODA: Insecta) In some caterpillars, setae of indefinite locations and numbers; usually not present on first instar.
secondary sexual characters
Characters that distinguish the sexes, though not functioning directly in reproduction.
secondary shell layer
(BRACHIOPODA) Shell deposited by outer epithelium median of outer mantle lobes. a. In Articulata, secreted intracellularly as fibers. b. In Inarticulata, if present, never ...
secondary sockets
(BRACHIOPODA) A pair of small depressions behind the cardinal process lobes that receive the secondary teeth.

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