laterocranium n. [L. latus, side; LL. cranium, skull] (ARTHRO: Insecta) The region of the head comprised of the genae and postgenae.
laterofrontal a. [L. latus, side; frons, front] Situated on the side but towards the front.
lateromarginal expansion (ARTHRO: Insecta) The median part of the marginal region of the phallobase of scara-baeoid beetles, characterized by an expansion of the margin into the lateral membrane.
lateropleural area (MOLL: Polyplacophora) The upper portion of the side slopes of an intermediate valve; denoting sculpture of a valve, lacking demarcation between the lateral and pleural areas.
lateroproximal marginal region (ARTHRO: Insecta) A lateral marginal region of the phallobase of scarabaeoid beetles, extending from the articulation with the tectum to where the margin and rugula intersect.
laterosternite n. [L. latus, side; Gr. sternon, breast; -ites, part] (ARTHRO: Insecta) Lateral plates at the sides of the eusternum in Isoptera, Dermaptera, and Blattaria.
laterotergite n. [L. latus, side; tergum, back; -ites, part] (AR-
THRO) A lateral or dorsolateral tergal sclerite.
lateroventral a. [L. latus, side; venter, belly] To the side (away from the midline of the body) and below.
lateroverted a. [L. latus, side; vertere, to turn] Displaced toward the side of the body; laterally displaced.
laticorn trumpet (ARTHRO: Insecta) In Diptera, a respiratory structure of mosquito pupae bearing the longest axis transverse to the stem, frequently with a secondary cleft in the pinna opposite the meatal cleft, less wide-mouthed than the angusticorn type, but with an elaborate lobe (tragus) on the rim of the pinna. see angusticorn trumpet.
laticostate a. [L. latus, broad; costatus, ribbed] Broad-ribbed.
latigastric a. [L. latus, broad; Gr. gaster, stomach] (ARTHRO: Chelicerata) Pertaining to those of the subphylum that are broadly joined between prosoma and opisthosoma. see cauligastric.
latirostrate a. [L. latus, broad; rostrum, beak] Having a broad rostrum. see angustirostrate.
latrodectism n. [ Latrodectus sp.; L. latro, brigand; Gr. dek-tes, biter; L. -ism, condition] (ARTHRO: Chelicerata) In Arachnida, envenomation of humans by Latrodectus (black widow) spiders.
latticed a. [Gr. latte, lath] To cross or interlace; cancellated.
latus n.; pl. latera [L. latus, side] (ARTHRO) 1. The side of the body. 2. (ARTHRO: Crustacea) In Cirripedia, any of the capitular plates except paired scuta and terga and unpaired rostrum, carina, subrostrum and subcarina of certain Lepa-domorpha. see carinal, inframedian, lower lateral plates, rostral and upper latus.
Laurer's canal (PLATY: Trematoda) In Digenea, a tubular canal extending from the base of the seminal receptacle; sometimes opening dorsally to the exterior; Laurer-Stieda canal.
leaflets n.pl. [A.S. dim. leaf] (MOLL: Bivalvia) A double row of flat, triangular, ciliated processes on the ctenidia of Proto-branchia that project into the mantle cavity for clearing particulate matter from the gills.
leberidocytes n.pl. [Gr. leberis, shed skin; kytos, container]
(ARTHRO: Chelicerata) In Arachnida, glycogen containing cells that develop from and back to leucocytes during molting.
lecithin n. [Gr. lekithos, egg yolk; -in, ending for fats, etc.] A very common, widely dispersed phospholipid, found in many kinds of cells.
lecithotrophic a. [Gr. lekithos, egg yolk; trophe, food] Obtaining nourishment from a large quantity of stored yolk, as in various invertebrates.
lecithotrophic development (BRYO: Gymnolaemata) Production of brooding larvae lacking a digestive tract.
lectoallotype n. [Gr. lektos, choose; allos, other; typos, type] A subsequent specimen of the opposite sex of the lectotype chosen from the original material.
lectotype n. [Gr. lektos, choose; typos, type] A specimen selected from a syntypic series that, subsequent to the publication of the original description, is selected and designated through publication to serve as the type.
left valve (MOLL: Bivalvia) While holding the bivalve shell with the hinge up and the apex or umbo pointed away from the pallial sinus toward the holder, the left valve is to the left.
lek n. [Sw. lika, to play] (ARTHRO: Insecta) A communal display area where males congregate for the purpose of attracting and courting females, and to which females come for mating; sometimes called an arena.
lemniscate, lemniscata n. [Gr. lemniskos, ribbon] A club-shaped organ.
lemniscus n.; lemnisci pl. [Gr. lemniskos, ribbon] (ACANTHO) One of a pair of elongate structures attached to the neck region and extending into the trunk cavity; may act as a reservoir for the fluid of the neck region when the proboscis is invaginated.
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