clavus


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Related to clavus: clavus hystericus

clavus

[′klāv·əs]
(invertebrate zoology)
Any of several rounded or fingerlike processes, such as the club of an insect antenna or the pointed anal portion of the hemelytron in hemipteran insects.
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1] forked near basal 1/3, with about 15 apical cells and 9 subapical cells, claval veins unite at middle of clavus.
Non-genitalic attributes are available to characterize this species, including pronotum flattening and short, thick setae on the scutellum, embolium, clavus, corium, and membrane.
Uncus slender and long, sharp apically; tegumen intermediate in size; valva relatively broad; cucullus arched; harpe slender, sharp apically and bifurcate basally, shorter than uncus; sacculus processus short and pointed apically; clavus triangular; saccus intermediate in size (Fig.
Forewing with apex of clavus sanguineous with a large bluish-black spot; base of first apical cell sanguineous (Kirkaldy, 1906) D.
2A, D); scutellum flattened; pronotum and scutellum impunctate; posterior part of metepimeron roundish, not angulate; metasternum without medial outgrowth; R + M vein almost reaching apex of corium; inner margin of clavus longer than scutellum (Fig.
Hemelytra: Mostly testaceous, with endocorium weakly enbrowned and bases of setae of exocorium dark brown, and with patterned red highlighting: on inner margins of clavus and anterior half of claval commissure, half length of exocorium, red star-shaped marking distally on corium.
Forewings pale brown, hyaline; veins brown, tubercles dark brown; stigma black; clavus with a short transversal brown band, just distad of fork PCu+A1.
Veins on clavus (Pcu and 1An) of forewing of about same thickness as Cu on the corium (Figs.
Head dark brownish orange, with 2 black maculae on posterior third of interocular space; tylus pale orange; most of juga and margin near eyes cover with a whitish cerumen; antennal segment I pale orange, segments II and III bright yellow with base and apex slightly darker, segment IV dark brown or reddish brown with base yellow; anterior lobe of pronotum dark brownish orange, posterior lobe yellowish orange with punctures slightly darker; scutellum with basal third yellowish orange and the rest reddish brown; clavus ochraceus with brownish orange punctures; corium hyaline, with punctures, a macula situated near middle third of endocorium, and a rectangular macula situated in the apical angle pale orange in color; membrane ambar.
Forewings color lighter than body, veins same to body, with a small brown mark along cross vein near apex of clavus.
Populations at Cabbage Tree Creek, further south of Yadboro, exhibit some differences from the former populations in color, being generally a little lighter, particularly on the frontal plate of the head, pronotal disk and clavus, all of which are more orangish brown.
DIAGNOSIS: Distinguished from other known congeners by the comparatively small size, light castaneous general coloration, somewhat obscured spots on the pronotum and clavus, short and not hooked hypophysis of the left paramere, elongated phallotheca, and not much modified sclerotized rings (Figs.