Perittopus anthracinus Ye & Bu, 2020

Ye, Zhen, Qiao, Mu, Jin, Zezhong & Bu, Wenjun, 2020, Notes on the genus Perittopus Fieber, 1860 (Hemiptera: Heteroptera: Veliidae with descriptions of three new species from Indochina, Zootaxa 4858 (3), pp. 417-426 : 418

Perittopus anthracinus Ye & Bu , sp. n.

( Figs. 1 , 4, 9 , 14, 17 , 20, 23, 26 , 32 )

Type material. Holotype: apterous female, CHINA: Yunnan Province, Honghe, Jinping county, Adebo village (22°54'N, 103°13'E), 30 July 2016, Yahui Zhen leg. ( NKUM) . Paratypes: 1 female and 1 male, apterous, same data as holotype ( NKUM) .

Diagnosis. P. anthracinus sp. n. seems to be closely related to P. yunnanensis Ye, Chen & Bu. However , P. anthracinus sp. n. can be distinguished by these combined characteristics: antennae shining black ( Fig. 1 ); medial part of pronotum in female with a slightly blackish mark, which is absent in male ( Figs. 4, 9 ); mediotergites II–VI almost blackish ( Figs. 4, 9 ); mediotergites VII–VIII in female with cluster of dense long, blackish, posterodorsad-directed hairs ( Fig. 14, 17 ); further difference is found in the shape of paramere, which shows a relatively broad basal part and pear-shaped distally twisted part, apex slightly blunt ( Fig. 26 ).

Description of apterous female ( Figs. 1 , 4 ). Color: ground color reddish, head reddish, labrum brownish, with buccula orange, rostrum yellowish with black apex; antennal segments I–IV shining black ( Fig. 1 ); pronotum reddish, medial part with a slightly blackish mark ( Fig. 4 ), area behind head along anterior margin of pronotum with a row of dark punctures, posterior part of pronotum with scattered slightly dark punctures; legs mainly blackish, basal part of femora dull orange, tibiae and tarsi black ( Fig. 1 ); abdominal dorsum mainly blackish except middle parts of mediotergites V–VII with dull reddish marks ( Fig. 4 ); abdominal venter orange. Structural characteristics: body length 3.74–3.76 (holotype: 3.76), medium-sized, stout, bearing short, blackish, appressed pubescence and dorsum anteriorly and laterally covered by suberect and thick hairs; head deflected, head length: 0.37–0.38, head width: 0.81–0.82, about 2.16 times head length, hind margin of head laterally and ventrally with some black peg-like spiculae; antennae relatively short and stout, about 0.41 times as long as body, lengths of antennal segments I–IV: 0.40, 0.35, 0.35, 0.45; pronotum length: 1.23–1.25, pronotum width: 1.48–1.49, hind margin of pronotum broadly rounded, medially reaching basal third of mediotergite II, lateral part of pronotum medially with distinct constriction ( Fig. 4 ), posterior part distinctly wider than anterior part, mesonotum and metanotum completely hidden beneath pronotal lobe except laterally, prosternum anteromedially with one row of black peg-like spiculae; legs mainly with decumbent, suberect and blackish hairs, tarsi of fore leg short and incrassate, tarsi of middle and hind legs long and slender, lengths of leg segments (femora, tibiae, and tarsi): fore leg: 0.80, 0.71, and 0.35 (0.05 + 0.30), middle leg: 1.05, 1.14, and 0.94 (0.30 + 0.30 + 0.34), hind leg: 1.10, 1.41, and 0.67 (0.10 + 0.24 + 0.33); mediotergites not flat, areas after mediotergite IV slightly depressed, connexiva strongly raised and moderately convergent ( Figs. 14, 17 ); mediotergites I–III with short pubescence, mediotergites IV–VI with several long hairs, mediotergites VII–VIII with cluster of dense long, blackish, posterodorsad-directed hairs ( Figs. 14, 17 ), connexiva VIII with dense, blackish hairs in caudal aspect. Genital segments: gonocoxa I platelike and exposed; proctiger small, directed posteriad, with dense, short hairs.

Description of apterous male ( Fig. 9 ). Similar to female in general structure and coloration with following exceptions: body length 3.40; head length: 0.28, head width: 0.72, about 2.57 times head length, antennae about 0.44 times as long as body, lengths of antennal segments I–IV: 0.35, 0.35, 0.36, 0.45; pronotum medially with a slight constriction, pronotum length: 1.06, pronotum width: 1.26, medial part without a blackish mark ( Fig. 9 ); lengths of leg segments (femora, tibiae, and tarsi): fore leg: 0.84, 0.80, and 0.35 (0.05 + 0.30), middle leg: 1.05, 1.14, and 1.00 (0.30 + 0.35 + 0.35), hind leg: 1.19, 1.47, and 0.74 (0.11 + 0.28 + 0.35), grasping comb relatively long, about 0.35 times fore tibiae length; mediotergites II–VI blackish ( Fig. 9 ), mediotergites almost flat, connexiva slightly raised and weakly convergent ( Fig. 9 ), all mediotergites and laterotergites with sparse and long blackish hairs, mediotergites VII–VIII without cluster of dense hairs ( Fig. 9 ); abdominal segment VIII ( Fig. 20 ) about 1.35 times as long as wide, with dorsal hind margin concave, pygophore and proctiger simple, proctiger about 2.11 times as long as wide ( Fig. 23 ), paramere with relatively broad basal part and pear-shaped distally twisted part, apex blunt ( Fig. 26 ).

Etymology. The specific epithet “ anthracinus ” (from Latin, meaning black) refers to the nearly black color of the male and female dorsa.

Distribution. China (Yunnan) ( Fig. 32 ).

Figures

FIGURE 32. Distribution records of species of Perittopus in Indochina.

FIGURES 1–3. Habitus of Perittopus spp. (females). (1) P. anthracinus sp. n. (holotype); (2) P. laosensis sp. n. (holotype); (3) P. trizonus sp. n. (holotype). Scale = 1.0 mm.

FIGURES 4–13. Bodies of females (4–8) and males (9–13) of Perittopus spp. in dorsal view. (4, 9) P. anthracinus sp. n. (apterous); (5, 10) P. laosensis sp. n. (apterous); (6, 11) P. trizonus sp. n. (apterous); (7, 12) P. laosensis sp. n. (macropterous); (8, 13) P. trizonus sp. n. (macropterous). Scale = 1.0 mm.

FIGURES 14–19. Abdomen of Perittopus spp. in dorsal and lateral view (female). (14, 17) P. anthracinus sp. n.; (15, 18) P. laosensis sp. n.; (16, 19) P. trizonus sp. n.. Scale = 1.0 mm.

FIGURES 20–29. Male genitalic structures of Perittopus spp.. Abdominal segment VIII in ventral views (20–22). (20) P. anthracinus sp. n.; (21) P. laosensis sp. n.; (22) P. trizonus sp. n.. Scale = 0.1 mm. Proctigers in dorsal views (23–25). (23) P. anthracinus sp. n.; (24) P. laosensis sp. n.; (25) P. trizonus sp. n.. Scale = 0.1 mm. Right parameres (26, 27, 29. in lateral views; 28. in perpendicular view). (26) P. anthracinus sp. n.; (27, 28) P. laosensis sp. n.; (29) P. trizonus sp. n.. Scale = 0.1 mm.