Gressitocoris henryi, Cerot, Frederic, 2018

Cerot, Frederic, 2018, Miscellanea Miridologica V. Taxonomy and chorology of new or little known taxa of Continental New Guinea and neighboring islands (Insecta, Heteroptera, Miridae), ZooKeys 796, pp. 83-95 : 85-87

Gressitocoris henryi sp. n.

Material examined.

Indonesia: Holotype ♀, Papua Barat, Doberai Peninsula, Arfak Mounts, Syoubri vill(age) (coordinates provided on the label: 1°06'40"S, 133°54'36"E), 1510 m, edge of secondary lower mountain rainforest, at white light, 12-13.ix.2015, Telnov D. leg. (FC n° 7565). Holotype deposited in DTPC, NME.

Description.

Female: Measurements (mm): Total length (dorsal view): 7.00, maximal width of hemelytra: 2.95, width of head across eyes ( “diatone”): 1.25, width of vertex: 0.45, length of antennal segments: I: 0.70, II: 1.68, III: 1.10, IV: 0.75, medial pronotal length (pronotal collar included): 1.45, posterior pronotal width (between humeral angles): 2.40, lateral length of pronotum (between anterior and humeral angles): 1.25, length of scutellum: 1.20, width of scutellum: 1.30, length of cuneus: 1.08, width of cuneus: 0.60 (0.75 with paracuneus).

External morphology and coloration.

Dorsally glabrous on pronotum, scutellum and hemelytra. Head (Figs 1-3): Elongate, smooth, slightly declivous in dorsal view. Clypeus medially black, laterally yellowish (Figure 2). Mandibulary and maxillary plates dark brown to black (Figure 3). Frons smooth, shining black. Vertex slightly carinate, carina brown, surface of vertex narrowly and shallowly punctate posteriorly, smooth anteriorly, dark brown to shining black medially, with two small yellowish areas near inner margins of eyes, prolonged on frons. Eyes reddish with several black patches medially (Figure 2), occupying head height in lateral view (Figure 3). First antennal segment thickened sub-basally, after small concavity, slightly longer than vertex width, yellowish brown, with apical black ring (Figure 9), apparently devoid of erect setae. Second segment narrower, significantly longer, yellowish brown, darker apically, with several erect setae obviously longer than width of segment. Third and fourth segments dark brown to black, with same erect pilosity. Labium reaching metacoxae, yellowish brown. Pronotum (Figs 1, 4-5): Pronotal collar (Figure 4) very short, brown, almost smooth, with very narrow and shallow punctation. Pronotal callosities (Figure 4) rounded, medially separated and separated from pronotal lateral margins, shining black, smooth. Pronotal lateral margins slightly concave to sigmoid medially, carinate, carina yellowish, easily visible in lateral view. Pronotal posterior margin (Figure 1) convex but medially almost straight and laterally, near humeral angles, slightly concave. Humeral angles rounded. Pronotal disk widely and deeply punctate (Figure 5), punctation dense, black, surface of disk dark brown. Mesoscutum covered (Figure 6). Scutellum (Figure 6) slightly swollen, reddish brown to dark brown, more narrowly punctate. Clavus and corium (Figure 7), including embolium, widely and deeply punctate, punctation black, surface of hemelytra evenly dark brown. Cuneus (Figure 8) dark brown bearing inner reddish sub-basal spot with wide whitish inner margin. Membrane (Figure 8) slightly declivous, greyish, veins thick, blackish to greenish, larger cell curved inward submedially. Coxae yellow. Pro- and mesofemora yellowish, darker apically. Metafemora dark brown to black. Metatibiae yellowish brown, as tarsi. Claws reddish. Pilosity of legs elongate, stiff, about as long as tibial spine. Propleura almost black, narrowly and shallowly punctate. Meso- and metapleura dull, blackish with yellowish areas. Abdomen dark brown, with elongate white setae.

Genital structures.

Not dissected to preserve the holotype.

Male unknown.

Etymology.

I am pleased to dedicate this new species to Dr T. J. Henry (United States National Museum of Natural History, Washington D.C, United States of America) in recognition of his major contributions to Heteroptera taxonomy, particularly to the classification and phylogeny of Berytidae and Lygaeoidea, but also to the study of several difficult plant bug genera such Ceratocapsus Reuter, 1876, Hyalochloria Reuter, 1907, Neurocolpus Reuter, 1876 and Ranzovius Distant, 1893.

Discussion.

Through the courtesy of Dr T. J. Henry, I was able to compare the new species to the dorsal and lateral views of a paratype of G. sedlaceki Carvalho, 1985, the type species of Gressitocoris and, until now the only species of the genus. The female holotype of the new species concords with Carvalho’s (1985) original description of Gressitocoris in a majority of character states. The antennal segments are covered by dense pilosity with some sparse, erect setae longer than width of the segment, the second antennal segment is slightly thickened apically, the posterior margin of pronotal disk is rounded but slightly concave laterally near humeral angles, the lateral margins are carinate, the pronotal disk and hemelytra (including wide embolium) are widely and deeply punctate, the scutellum is more narrowly punctate, the vein of larger areolar cell of the membrane is thick, expanded posteriorly, curved inward submedially and a reddish sub-basal spot with wide whitish inner margin is present on inner part of cuneus.

A very narrow and shallow punctation is apparently present on the pronotal collar of both species (contra Carvalho 1985).

Gressitocoris henryi sp. n. differs from G. sedlaceki Carvalho, 1985 by the length of the third antennal segment shorter than the length of the second antennal segment (versus slightly longer in G. sedlaceki ), the eyes less wide, the covered mesoscutum and the darker dorsal coloration, particularly the medial black stripe of clypeus, the medial black patch of frons and vertex (both absent in G. sedlaceki ), the almost even dark brown to black pronotum (yellowish brown lateral areas and posterior margin absent), the reddish brown scutellum (yellowish lateral stripes absent), the almost even dark brown hemelytra, and absence of an elongate yellowish stripe lining the clavo-corial suture.

As pointed out by T. Yasunaga (in litt. 2017-08-22), the validity of the genus Gressitocoris Carvalho, 1985 should be analyzed and compared with the large genus Deraeocoris Kirschbaum, 1856, whose monophyly remains to be established. However, Gressitocoris henryi sp. n. differs in habitus from all Papuan species of Deraeocoris described or redescribed by Carvalho (1985).

Distribution.

Indonesia, Papua Barat, Doberai Peninsula. Type locality: Syoubri vill(age) (1°06'40"S, 133°54'36"E).