basitarsus

basitarsus

[¦bās·ə¦tär·səs]
(invertebrate zoology)
The basal segment of the tarsus in arthropods.
References in periodicals archive ?
Diagnosis: Median occipital sclerites black; hind legs at least partly yellow, hind tibia and base of hind basitarsus black; CuP (postcubitus) developed at most as hyaline, M3 straight as parallel to M2; R2+3 arising close to anterior cross-vein, not confluent with R1; scutum uniformly yellow to yellowish brown; wings not infumated; lower half of frontal callus pale.
Thorax brownish red; pronotum brown, hexagonal, with a median carina strongly marked; pronotum with anterior margin straight, lateral-anterior margins straight, lateral posterior margin slightly sinuous, posterior margin grooved; scutellum brownish with slight central concavity, tegmina castaneous, apical plexus of veins developed; hindwings hyaline with brownish venation, vein Cu1 not thickened at base; legs brownish red; metathoracic tibia with two lateral spines (basal spine equal in size to spines in apical crown; apical spine larger than spines in apical crown); apical crown of spines on tibia consisting of two rows; basitarsus with three rows of spines covered by long setae; subungueal process present and triangular.
Tibia IV with one sub-medial tactile seta (TS=0.43), basitarsus IV with one basal tactile seta (TS=0.14), telotarsus IV with one tactile seta (TS = 0.37).
Leptofoenus is characterized by presenting the eighth gastral tergum reduced, pronotal lateral surfaces with finely striate regions and the length of basitarsus of all legs twice as long as second tarsomere (Engel, 2009).
Femoral anterior ventral edge of leg I type C (Roth, 2003) with a comb of tiny spines and 3 long hairs, 1 apical spine and genicular spine present; legs II and III with apical and genicular spines; basitarsus of leg I shorter than the sum of the tarsites length (Fig.
Leg IV with threemacrosetae on genu 50 (40-55), tibia 43 (38-50) and basitarsus 73 (63-83) long respectively.
The sex comb is a male-specific row of "teeth" on the basitarsus of the male prothoracic leg.
21) Basitarsus 3 of female slender, more than three times longer than wide (1); basitarsus broader, less than or equal to three times longer than wide (0).
Legs.--Tarsal claws not pectinate; hind basitarsus 2.4x length of inner apical spur of hind tibia.