Longiclavula Yao, Cai & Ren

Yao, Yunzhi, Cai, Wanzhi & Ren, Dong, 2006, The first discovery of fossil rhopalids (Heteroptera: Coreoidea) from Middle Jurassic of Inner Mongolia, China, Zootaxa 1269, pp. 57-68 : 63-64

Genus Longiclavula Yao, Cai & Ren , gen. nov.

Type species: Longiclavula calvata Yao, Cai & Ren , sp. nov.

Diagnosis: Body moderately sized, elongate, general body plan resembling alydids’, dorsal surface smooth, impunctate. Head width and length subequal, slightly shorter than pronotum, apex surpassing first segment of antenna; antennae 4­segmented, longer than half of body, first segment short and thick, second, third, and fourth segments slender, second segment longest, fourth shorter than third segment; eyes moderately large, round and prominent, distance between two eyes wider than diamete of an eye. Pronotum trapezoidal, slightly transverse, with collar; femur lacking spine; hemelytron macropterous, long and narrow, apical margin rounded, nearly reaching to tip of abdomen, with distinct embolium, corium elongated on costal margin, with only one wavy longitudinal vein; clavus tapering, without carina and vein; membrane with numerous veins. Abdomen oval, all sutures of abdominal straight, third to fifth sterna subequal in width, distinctly wider than other sterna.

Distribution: China.

Etymology: The name is a combination of the Latin longus (‘long’) and clavula (“clavus”), alludes to its very long clavus and lack of a claval commissure. The gender is feminine.

Remarks: This new genus can be placed next to Miracorizus as they are similar in the following characters: antenna long and slender, the first segment shortest, not extending beyond head apex, the second segment longest, fourth segment shorter than third segment; legs without spine; hemelytron macropterous, costal margin of corium elongated, clavus tapering, longer than lateral side of scutellum, without claval commissure. But Longiclavula can be easily distinguished from Mircorizus by dorsal surface smooth (vs. densely punctate), length of body about 4 times of the width (vs. about 3 times), corium with only M and without medial fracture (vs. without M and medial fracture), clavus without veinlike carina and vein (vs. with a veinlike carina and a vein arising at its basal point).

Longiclavula is also similar to Monstrocoreus Popov, 1968 in body relatively elongated, clavus tapering, only one vein on corium; but the new genus can be distinguished from the latter by head over 0.5 times as wide as base of pronotum (vs. less than 0.5 times as wide as base of pronotum); antenna relatively shorter, slightly longer than half of body (vs. subequal to body); M crooked (vs. M nearly straightly); third to fifth abdominal sterna subequal in width (vs. third to sixth subequal in width).