Neocrassocoris longzhouensis, Bai & Heiss & Cai, 2019

Bai, Xiaoshuan, Heiss, Ernst & Cai, Wanzhi, 2019, Neocrassocoris, a new apterous genus of Carventinae from China (Heteroptera: Aradidae), Zootaxa 4612 (1), pp. 95-102 : 99-102

Neocrassocoris longzhouensis sp. nov.

( Figs. 18–28 )

Type material. Holotype (♂): China, Guangxi, Longzhou, Nonggang , 14.viii.2013, leg. X.S. Bai ( IMNU); pro- vided with type label.

Diagnosis. General aspect similar to Neocrassocoris pingbianensis sp. nov., but distinguished from the latter by its narrow pronotum 2.74 times as wide as long (3.02), anterolateral lobes widely rounded (anterolateral angles produced and forming blunt lobes in pingbianensis ); shorter antennae 2.38 times as long as width of head (2.47); male posterolateral angles of deltg VII rounded (posterolateral angles of deltg VII angular in pingbianensis ).

Description of male. Head. Longer than wide across eyes (1.06: 0.86); genae slightly notched anteriorly, reaching basal one-third of first antennal segment; clypeus strongly raised anteriorly, with tubercle near apex; antenniferous tubercles short, dilated, apices acute; antennae 2.38 times as long as width of head across eyes, length of antennal segments I to IV= 0.66: 0.33: 0.73: 0.33; eyes small, convex; postocular tubercles small and not reaching outer margin of eyes, postocular lobes strongly constricted posteriorly; vertex with irregular carinae flanked by a pair of large, ovate infraocular callosities.

Pronotum. 2.74 times as wide as long (1.45: 0.53), attenuated anteriorly; collar thick, as wide as diameter of first antennal segment (0.15: 0.15); anterolateral angles slightly produced and widely rounded; disc with a longitudinal median furrow, flanked by a pair of subtriangular plates which meet at anterior margin; laterally of plates disc with four (2+2) tuberculate callosities; laterad of callosities with a pair of subrectangular plates with strongly elevated granulate carinae; posterior margin of pronotum slightly convex separated from mesonotum by a deep furrow.

Mesonotum. Wider than pronotum (1.91: 1.45); separated from metanotum by a pair of very deep furrows; elongate, subpentagonal median ridge across meso- and metanota flanked by deep furrows and a pair of longitudinal smooth carinae; laterally of carinae with a pair of subrectangular plates with longitudinal, irregular callosities and granulate carinae along lateral margin.

Metanotum and mtg I+II. Wider than mesonotum (2.1: 1.91); median ridge flanked by a pair of deep oval excavations, laterally of with a pair of oval plates with large oval and longitudinal callosities, lateral margins granulate, like those of mesonotum; disc of mtg I with a pair of deep oval depressions sloping anterolaterally; disc of mtg II with a pair of deep furrows, sloping posteriorly and sideways, posterior margin carinate.

Abdomen Tergal plate consisting of mtg III–VI, subquadrangular, posterior margin truncate, lateral margins slightly rounded; with a slightly raised median ridge on mtg III, a pentagonal elevation on mtg IV then tapering posteriorly; laterad of median ridge with the usual pattern of large and small callous spots; deltg II+III completely fused, IV–VII separated by fine sulci; posterolateral angles formed by the dorsally reflexed vltg II–VII progressively protruding, posterolateral angles of deltg VII rounded; ptg VIII clavate, reaching to posterior margin of deltg VII; pygophore cordate ( Figs.24–25 ); parameres slender ( Figs.26–28 ).

Venter. Sterna III to VI raised along posterior margin, depressed along anterior border and with triangular, smooth spots medially, flanked by a pair of large, transversely ovate shallow depressions, these bearing a pair of round callous spots of usual pattern; spiracles II to VII lateral and visible from above, VIII terminal; lateral rim of male vltg VII with a shiny sublateral callus anterior to spiracle VII.

Legs. Slender, preapical comb on fore tibia present, claws with fine pulvilli.

Measurements [in mm, ♂ (n=1)]. Body length 5.35; maximal width of abdomen 2.55. Head length 1.06, width 0.86. Pronotum length 0.53, width 1.45. Mesonotum width 1.91. Metanotum width 2.1. Length of antennal segments I–IV =0.66, 0.33, 0.73, 0.33.

Etymology. The specific name refers to the type locality.

Distribution. China (Guangxi).

Figures

FIGURES 18–19. Neocrassocoris longzhouensis sp. nov. 18–19, holotype male; 18, dorsal view; 19, ventral view. Scale bar = 1 mm.

FIGURES 20–28. Neocrassocoris longzhouensis sp. nov. 20–23, different body parts; 24–25, pygophore in dorsal and lateral view; 26–28, right paramere; 20, 22, dorsal view; 21, 23, ventral view.Arrows indicate the position of the callus. Scale bar = 0.5 mm for 20–23; 0.1 mm for 24–28.