Ribesaptera seraphinei, Baňař, Petr, Heiss, Ernst & Hubáčková, Lenka, 2016

Baňař, Petr, Heiss, Ernst & Hubáčková, Lenka, 2016, New species of Ribesaptera Heiss from eastern Madagascar (Hemiptera: Heteroptera: Aradidae), Zootaxa 4088 (1), pp. 146-150 : 147

Ribesaptera seraphinei sp. nov. Baňař & Heiss ( Figs. 1–12 )

Diagnosis. Ribesaptera seraphinei sp. nov. can be easily distinguished from Ribesaptera elongata Heiss, 2011 by its slender and more elongate habitus, the smaller body size—3.82 mm (4.65 mm in holotype male of R. elongata , wider habitus); longer antennae—3.0 times as long as width of head across eyes (2.60 in R. elongata ); third antennal segment 2.11 times as long as fourth (2.0 times in R. elongata ); by the presence of middle tubercle in the collar (absent in R. elongata ); by narrower pronotum—ratio width to length 1.96 (2.09 in R. elongata ) and by the very long tubercle on sternite VII bearing the spiracle (tubercle subequal in length as other tubercles on sternites in R. elongata ).

Description. Apterous, flat, body sub-parallel, narrowing anteriorly; surface shiny, smooth and glabrous with rugose and setose elevations; colouration of body black, antennae and legs partly paler, reddish brown. Head: Inconspicuously longer than width across eyes (ratio 1.05); clypeus short, reaching to smooth basal constriction of antennal segment I. Antenniferous lobes short, as long as clypeus ( Fig. 8 ). Eyes subglobular, ocular index 4.4. Antennae very long, three times as long as width of head across eyes. Segment I widest, slightly shorter than length of head (ratio 0.82); beset with setigerous granules. Segment II shortest, inconspicuously widening apically. Segment III thinnest and longest 2.11 times as long as segment IV. Segment IV fusiform, with long and dense apical pilosity. Thorax: Pronotum 1.96 as wide as long, narrowing anteriorly. Collar ring-like, smooth, depressed posteriorly, with two (1+1) lateral, two (1+1) dorsolateral and single median tubercles ( Fig. 10 ). Dorso-lateral parts of pronotum elevated, elevations sparsely beset with setigerous granules. Posterior margin of pronotum slightly bisinuate, mesally with two short tubercles directed caudally. Mesonotum separated from pronotum by deep furrow, narrow, ratio of its width to length 3.3; its anterior part mesally with deep depression, medial part of mesonotum raised with a longitudinal double ridge ( Fig. 10 ). Lateral parts of mesonotum slightly elevated, each with few setigerous tubercles. Metanotum fused to mtg I+II, separated from mesonotum by deep furrow, with paired pits laterally of mesonotal ridge ( Fig. 10 ). Anterior part of metanotum deeply depressed. Antero-lateral and lateral parts of metanotum with few setigerous granules on minute elevations. Legs long and slender, femora slightly incrassate medially, coarsely granulate, tibiae cylindrical, slightly curved apically.

Abdomen. Mtg I+II marked by depressions lateral of median keel, lateral margins converging posteriorly, posterior margin straight. Pregenital abdomen. Glabrous, tergal plate consisting of fused mtg III–VI; its medial elevated ridge highest at mtg IV, sloping anteriorly. Lateral apodemal impressions deep, distinctly visible. Ratio length to maximum width of tergal plate 1.10. Deltg I–III fused ( Fig. 12 ), triangular, reaching mesonotum anteriorly ( Fig. 10 ), deltg IV–VII separated, surface of deltg II–VII with setigerous elevations (deltg III–V along inner margin; deltg II, VI–VII on majority of surface). Tergite VII separated from tergal plate by a conspicuous, straight furrow, in middle of its anterior margin deeply depressed, overlapped by a median anteriorly directed process ( Fig. 12 ). Posterior third of tergite VII markedly raised, posterior margin concave. Spiracles II–VII lateral on protruding tubercles (tubercle VII very long), visible from above. Male genitalia. Pygophore subglobular ( Fig. 4 ), its posterior face coarsely rugulose. Sternite VIII as ( Fig. 6 ), its posterior margin bisinuate, paratergites VIII thick with well visible spiracles. Parameres and aedeagus not dissected and studied in detail.

Measurements. Total body length —3.82. Head. Total length—0.67; maximum width across eyes—0.64; minimum interocular distance—0.44. Antenna (lengths of segmnets): Segment I—0.53; segment II—0.27; segment III—0.76; segment IV—0.36. Pronotum. Total length—0.49; maximum width—0.96. Abdomen. Tergal plate, length—1.00; tergal plate, maximum width—0.91.

Etymology. Dedicated to first author’s friend, Seraphine Rakotomalala (Andasibe, Madagascar).

Distribution. Andasibe–Mantadia NP (Mantadia part), eastern Madagascar.

Material examined. Holotype male, labelled: ‘ASB/Jan.2015/31 C MADAGASCAR /

Andasibe-Mantadia N.P.; 29.1.2015 / Mantadia, circuit „ Rianasoa “ / S18°50′01′′E48°26′18 ′′ / sifting bamboo litter, Winkler app. extr. / P. Baňař & E.M. Rabotoson lgt. [printed white label] // Holotype / Ribesaptera / seraphinei sp. nov. / Baňař P. & Heiss E. 2015 des. [printed red label]’ (MMBC) [holotype is card-mounted, missing right fore leg and left middle tarsus, pygophore and segment VII are mounted separately on the same card].

Figures

FIGURES 1 – 6. 1, 3, 5 — Ribesaptera elongata Heiss, 2011, male (Andasibe – Mantadia NP); 2, 4, 6 — Ribesaptera seraphinei sp. nov., male holotype; 1 – 2 dorsal habitus; 3 – 4 pygophore, posterior view; 5 – 6 segment VII, ventral view. Scale bar in mm.

FIGURES 7 – 12. 7, 9, 11 — Ribesaptera elongata Heiss, 2011, male (Andasibe – Mantadia NP); 8, 10, 12 — Ribesaptera seraphinei sp. nov., male holotype; 7 – 8 head, dorsal view; 9 – 10 pronotum and mesonotum, dorsal view; 11 – 12 abdomen, dorsal view. Scale bar in mm.