Scaphisoma breviatum, Ivan Löbl & Ryo Ogawa, 2016

Ivan Löbl & Ryo Ogawa, 2016, On the Scaphisomatini (Coleoptera, Staphylinidae, Scaphidiinae) of the Philippines, IV: the genera Sapitia ACHARD and Scaphisoma LEACH, Linzer biologische Beiträge 48 (2), pp. 1339-1492 : 1382-1383

5.2.8.1. Scaphisoma breviatum nov.sp. ( Figs 110, 111 )

T y p e m a t e r i a l: Holotype 6: Luzon: Philippines Mt. Pangao (2350m) nr. Data Ifugao Pv. 14.VII.1985 M. Sakai leg. (EUMJ). Paratypes: Luzon, with the same data as the holotype, 5 66, 6 ♀♀ (EUMJ, MHNG, BZLA); Luzon, Mountain Prov., Mt. Data, 2250 m, 25.VII.1985, leg. M. Sakai, 1 6, 1♀ (EUMJ, MHNG); Luzon, Mountain Prov. Mount Data, 8.I.80, leg. L. Deharveng & J. Orousset, 1 6 (MHNG).

Description: Length 1.22-1.48 mm, width 0.86-1.12 mm. Head, pronotum, elytra, meso- and metaventrite very dark, reddish-brown to black, hypomera, femora, tibiae and sternite 1 lighter, reddish-brown, antennae brown, tarsi and apical abdominal segments light reddish or yellowish. Pronotum and elytra not microsculptured and not iridescent. Length/width ratio of antennomeres as: III 9/6: IV 13/5: V 22/7: VI 20/9: VII 33/13: VIII 15/10: IX 30/15: X 30/14: XI 42/15. Pronotum very finely and sparsely punctate, punctures hardly visible at 50 times magnification, lateral contours evenly rounded, lateral margin carinae not visible in dorsal view, lateral striae each with distinct puncture row. Exposed tip of scutellum minute. Elytra with lateral margin carinae not visible in dorsal view, apical margins rounded, inner apical angles not prominent, situated posterior level of outer angles; sutural margin raised, sutural striae shallow, bent at base, extending along basal margin to form basal striae reaching outer third of basal width, parallel from level of tip of scutellum toward apices, impunctate; adsutural areas narrow, extremely finely punctate. Lateral striae appearing impunctate. Elytral disc with punctation very fine and sparse, as that of pronotum. Hind wings fully developed. Hypomera and mesanepisterna smooth. Mesepimera about as long as intervals to mesocoxae and about twice as long as wide. Metaventrite not microsculptured, extremely finely punctate. Median part of metaventrite convex, without impressions; antecoxal puncture rows absent. Submesocoxal areas 0.03 mm, about as fifth to sixth of intervals to metacoxae, submesocoxal lines convex, finely but distinctly punctate. Metanepisternum flat, broad, slightly narrowed anteriad, inner margin almost straight, suture deep. Protibiae straight, mesotibiae and metatibiae slightly curved. Abdomen without obvious microsculpture, punctation very fine and sparse, hardly visible; submetacoxal areas reduced, submetacoxal lines indistinct, with marginal punctures situated at basal margin of sternite 1.

M a l e: Protarsomeres 1 to 3 weakly widened. Aedeagus ( Figs 110, 111 ) 0.35-0.42 mm long, symmetrical, weakly sclerotized. Median lobe with flattened basal bulb, small, hardly prominent articular processes and long apical process. Latter almost in axis with basal bulb, shortly curved near blunt apex. Parameres lacking membranous lobes, weakly curved in dorsal and lateral views. Internal sac with two narrow rods and spine-like structures distinct in its middle part, in dorsal view.

Etymology The species epithet is a Latin adjective meaning shortened, referring to the short antennae.

C o m p a r a t i v e n o t e s: The shape of the submetacoxal lines is polymorphic in Scaphisoma , nonetheless these lines are distinctly separated from basal margin of the sternite 1 in almost all so far examined species, S. breviatum, and a few members of the S. unicolor group excepted.

Figures

Figs 108 - 114: Aedeagi of Scaphisoma; (108, 109), S. subanun nov. sp., in dorsal and lateral views; (110, 111), S. breviatum nov. sp., in dorsal and lateral views; (112, 113), S. opacum nov. sp., in dorsal and lateral views; (114), S. elpis nov. sp., in dorsal view, without contours of proximal part of basal bulb. Scale = 0.1 mm.