Scaphisoma deharvengi, 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 : 1368

5.2.7.6. Scaphisoma deharvengi nov.sp. ( Figs 80-82 )

T y p e m a t e r i a l: Holotype 6: Luzon: Mountain Prov. Mount Data Lodge 2200-2300m, 23-24.XII.79 L. Deharveng & J. Orousset (MHNG).

Description: Length 1.55 mm, width 1.07 mm. Head and most of body blackish-brown, elytra dark brown in apical two fifth, apical abdominal segments and legs reddish-brown, antennae yellowish. Pronotum and elytra not microsculptured and not iridescent. Length/width ratio of antennomeres as: III 12/6: IV 28/5: V 38/6: VI 40/8 (remaining antennomeres broken off and missing). Pronotum finely and densely punctate, punctures well visible at 30 times magnification, lateral contours evenly rounded, lateral margin carinae visible in dorsal view, lateral striae finely punctate. Exposed tip of scutellum minute. Elytra with lateral margin carinae exposed in dorsal view, apical margins truncate, inner apical angles not prominent, situated in level with outer angles; sutural margin slightly raised, sutural striae fairly deep, hardly bent at base, not extending along basal margins, almost parallel from level of tip of scutellum toward apical third, converging near apices, finely punctate; adsutural areas narrow, finely punctate. Lateral striae appearing impunctate. Elytral disc with punctation near bases fine and very dense, similar to pronotal, punctation on remaining surfaces coarser than that on pronotum, punctures not well delimited, as large as or smaller than intervals between them. Hind wings fully developed. Hypomera, mesanepisterna and metanepisterna lacking microsculpture, distinctly punctate, punctures larger than those on pronotum or on metaventrite. Mesepimera about as long as intervals to mesocoxae and about four times as long as wide. Metaventrite very finely punctate, without microsculpture on lateral parts, with strigulate microsculpture on median area and between mesocoxae and metacoxae. Median part of metaventrite somewhat convex, with two shallow apicomedian impressions; antecoxal puncture rows absent. Submesocoxal areas 0.03 mm, about as fifth of intervals to metacoxae, submesocoxal lines convex, distinctly punctate. Metanepisternum flat, wide, not narrowed anteriad, inner margin straight, suture deep. Tibiae straight. Abdomen with distinct strigulate microsculpture and very finely punctate. Sternite 1 with submetacoxal areas about 0.05 mm, about as fourth of intervals to apical margin, submetacoxal lines convex, with distinct marginal punctures.

M a l e: Protarsomeres 1 to 3 moderately widened. Aedeagus ( Figs 80-82 ) 0.62 mm long, symmetrical, fairly strongly sclerotized. Apical process of median lobe almost as long as basal bulb, inflexed, with ventral side straight except near tip, in lateral view gradually narrowed and with acute tip, in dorsal view with blunt tip; articular processes large, prominent. Parameres narrowed from bases to mid-length, posterior mid-length widened, abruptly notched subapically in dorsal view, straight with narrowed, curved apices in lateral view, reaching beyond tip of median lobe. Internal sac without rods or flagellum, with weakly sclerotized, short denticle and scale-like structures.

E t y m o l o g y: The species is named in honour of Louis Deharveng, Paris, France. Comparative notes: This species may be readily distinguished by the distinctly punctate hypomera, mesanepisterna and metanepisterna, and by the shape of the parameres. Nonetheless, the aedeagal characters, in particular the shape of the median lobe with dorsal lamellar valve and the well developed articular processes suggest relationships with S. binaluanum and its allied described above.

Figures

Figs 76 - 82: Aedeagi of Scaphisoma; (76, 77), S. casiguran nov. sp., in dorsal and lateral views, scale = 0.2 mm; (78, 79), S. compactum nov. sp., in dorsal and lateral views, scale = 0.2 mm; (80, 81), S. deharvengi nov. sp., in dorsal and lateral views, scale = 0.2 mm; (82), ditto, paramere in ventral view, scale = 0.1 mm.