Paraphloeostiba amooraphila, Shavrin, Alexey V., 2017

Shavrin, Alexey V., 2017, New species and records of Omaliini from East Asia (Coleoptera: Staphylinidae: Omaliinae), Zootaxa 4247 (1), pp. 94-100 : 97-99

Paraphloeostiba amooraphila sp. n. ( Figs. 10−18 )

Holotype ♂: ‘ CHINA: Hainan isl. [MF24] | Bawangling National F [o]r[e] st. Park | (park border on the road) | ca. 19°5.58ʹN 109°10.0ʹE | ca. 1000m, 8.v.2011, [M.] Fikáček’ <rectangular label, printed>, ‘drying-up pericarp of the | fruit of Amoora dasyclada | ( Meliaceae ) in a primary | mountain forest’ <rectangular label, printed> ( NMPC)

Paratypes: 10 ♂ [Two specimens were dissected: a plastic card with the last abdominal segment, abdominal tergite and sternite VIII, and the aedeagus mounted in Canadian balsam were pinned under the card with specimens], 9 ♀ [Two specimens were dissected: a plastic card with the last abdominal segment, spermatheca, abdominal tergite and sternite VIII in Canadian balsam were pinned under the card with specimens]: same data as the holotype (2 ♂, 2 ♀ - CS; 8 ♂, 7 ♀ - NMPC) .

Description. Measurements (n=20): WH: 0.42–0.47; LH: 0.22–0.29; LA (holotype): 0.45; LE: 0.13̅0.17; LP: 0.32– 0.39; WP: 0.50–0.66; LEl: 0.53–0.61; WE: 0.66–0.75; WA: 0.64̅0.72; LAed: 0.45–0.47; TL: 1.88–2.45 (holotype: 2.40).

Body yellowish brown to red-brown; antennomeres 6–11, apical portion of head, scutellum, postero-lateral and apical portions of elytra brown; ocelli, antennomeres 1–5, legs and abdominal tergite VIII yellow. Head with indistinct moderately large flattened punctation more distinct in medial portion; pronotum with punctation of same diameter as that on head, but deeper and regular, lacking along midline; punctation of elytra slightly larger than that on pronotum forming very indistinct diagonal row entire length of each elytron; narrow apical, lateral portions and band along elytral suture without punctures; scutellum and abdomen without visible punctation. Head, pronotum and scutellum with strong cellular microsculpture (ground sculpture); elytra with regular dense cellular microsculpture similar to that on pronotum, but slightly larger and somewhat weakly expressed; abdomen with fine isodiametric (abdominal tergites III–V) or cellular (abdominal tergites VI–VIII) microsculpture.

Head slightly convex in middle portion, 1.6–1.9 as broad as long, with short and very deep anteocellar grooves extending from large ocelli; posterior parts of orbital margin located very close to large and convex eyes. Antennae short, with distinct six-segmented club of antennomeres 6–11; antennomeres with lengths × widths (holotype): 1: 0.08 × 0.03; 2: 0.05 × 0.03; 3: 0.06 × 0.02; 4–5: 0.02 × 0.02; 6: 0.03 × 0.04; 7–8: 0.03 × 0.05; 9–10: 0.03 × 0.06; 11: 0.07 × 0.06.

Pronotum distinctly convex, 1.5–1.6 as broad as long, 1.1–1.4 as wide as head; gradually narrowing from widest middle towards rounded anterior angles and more or less sharply narrowing towards obtuse posterior angles; median disc of pronotum without longitudinal but with well defined postero-lateral impressions.

Elytra 1.1–1.2 times as wide as long, 1.5–1.6 as long as pronotum; epipleural keel well distinct, moderately narrow.

Abdomen slightly narrower than elytra, with two small tomentose spots on abdominal tergite IV, with distinct narrow palisade fringe on apical margin of abdominal tergite VII.

Male. Apical margin of abdominal tergite VIII straight ( Fig. 13 ). Abdominal sternite VIII with deep emargiantion ( Fig. 14 ). Aedeagus ( Fig. 10 ) with wide basal bulb, with swollen lateral portions in preapical part and with elongated thin lanceolated median lobe widened in apical portion; parameres wide, exceeding apex of aedeagus, with very wide setiferous lobes with two pairs of long apical and lateral long setae and several short setae along entire length of inner edge; endophallus complicated, with curved elongate sclerite in basal portion ( Fig. 11 ). Aedeagus laterally as in Fig. 12 . Female. Apical margins of abdominal tergite VIII ( Fig. 15 ) and sternite VIII ( Fig. 16 ) somewhat straight. Accessory sclerite as in Fig. 17 . Spermatheca as in Fig. 18 .

Comparative notes. Using the key in Steel (1960), P. amooraphila sp.n. would key out at couplet 3, together with P. rhopalocera ( Cameron, 1928) , described from Sumatra ( Cameron, 1928), which also has the pronotum without longitudinal impressions, with well-defined ground microsculpture and wide parameres exceeding apex of the aedeagus. It differs from P. rhopalocera by the larger body, paler coloration, by the more regular punctation of the pronotum, by the shape of preapical part of the aedeagus, and by the wider and shorter parameres. Based on the body size and coloration, on the pronotum without traces of longitudinal projections and on the shape of preapical part of the aedeagus, P. amooraphila sp.n. is similar to P. sumatrensis ( Bernhauer, 1905) , described from Sumatra ( Bernhauer, 1905), from which it differs by the shape of antennal segments, by the character of punctation of the forebody, by the details of the structure of the aedeagus, by the wider apical portion of female accessory sclerite and by smaller spermatheca.

For comparison of the morphological characters provided here see Figs. 34–35, 65–66, 107– 108 in Steel (1960).

Distribution. The new species is known only from the type locality in Hainan, China.

Etymology. The name of the new species is derived from the fact that the beetles were collected from the drying-up pericarp of Amoora dasyclada (Meliaceae) .

Figures

FIGURES 10 − 18. Paraphloeostiba amooraphila sp. n.: 10 — aedeagus, parameral view, 11 — endophallus, parameral view, 12 — aedeagus, lateral view, 13 — male abdominal tergite VIII, 14 — male abdominal sternite VIII, 15 — female abdominal tergite VIII, 16 — female abdominal sternite VIII, 17 — female accessory sclerite, 18 — spermatheca. Scale bar: 0.1 mm.