Scaphisoma pseudokalabitum, 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 : 1411-1412

5.2.18.7. Scaphisoma pseudokalabitum nov.sp. ( Figs 28, 171-173 )

T y p e m a t e r i a l: Holotype 6: Palawan: Central, Cabayugan nr. Lion’s Cave, sea level, 1.XII.1995 I. Löbl fungi on logs (MHNG). Paratypes: with the same data as the holotype, 12 66, 6♀♀ (MHNG); same but leg. J. Kodada, 1 ex. (MHNG); Palawan, nr. Cabayugan, degraded forest 150 m, 2.XII.1995, leg. J. Kodada & B. Rigová, 16 ex. (MHNG); Palawan, Sabang, trail to Underground River, sea level, 30.XI.1995, leg. I. Löbl, 4 66, 1♀ (MHNG); Palawan, Sabang, 50- 100 m, degraded forest on slope, leg. J. Kodada & B. Rigová, 1♀ (MHNG, BZLA); Palawan, Sabang, N. of Mt. St. Paul, 11-13.VII.1977, leg. M. Satô, 2♀♀ (MHNG); Palawan, Binaluan, 1 ex. (SMTD); Palawan, Roxas, region of Matalangao, 80 m, 5.IV.1983, leg. S. Nagai & C. Lienhard, 1♀ (MHNG); Palawan, Mantalingajan Range, S. slope Mt. Balabag, 3900 ft., 13.V.47, leg. F.G. Werner, 1♀ (FMNH).

D e s c r i p t i o n: Length 1.10-1.2 mm, width 0.75-0.87 mm. Head, thorax, most of elytra and sternite 1 uniformly reddish-brown or sternites 1 to 3 lighter. Apical sixth to fifth of elytra darkened, except light apical margins. Appendages ochreous to yellowish. Pronotum and elytra not microsculptured and not iridescent. Length/width ratio of antennomeres as: III 11/5: IV 22/4: V 38/4: VI 35/5: VII 50/10: VIII 37/8: IX 48/12: X 45/12: XI 60/12. Pronotal punctation very fine and sparse on prevailing surface, dense and fairly coarse on well delimited basal band; pronotum with lateral contours weakly rounded, lateral margin carinae hardly visible in dorsal view, lateral striae distinctly punctate. Exposed tip of scutellum minute. Elytra with lateral margin carinae hardly visible in dorsal view, apical margins truncate, inner apical angles not prominent, situated about in level with outer angles; sutural margin raised, sutural striae deep, starting posterior level of scutellum, parallel toward apical fourth of sutural length, converging toward apices, coarsely punctate; adsutural areas narrow, flat, densely and fairly coarsely punctate, lateral striae coarsely punctate, epipleural striae distinctly striate. Elytral disc with punctation dense and coarse from bases to apical fifth, becoming finer but distinct toward apices; coarse punctures to part larger than puncture intervals, to part in oblique lines. Hind wings fully developed. Hypomera and mesanepisterna with strigulate smooth. Mesepimera about twice as long as intervals to mesocoxae, about four times as long as wide. Median part of metaventrite convex, lacking mesal or apicomesal impressions or striae, with strigulate microsculpture between mesocoxae and metacoxae; punctation irregular, fairly coarse and sparse in middle; lateral parts of metaventrite very finely and sparsely punctate; antecoxal puncture rows present, in impressed lines. Submesocoxal areas 0.02 mm, about as fifth of intervals to metacoxae, submesocoxal lines convex, coarsely punctate. Metanepisternum convex, narrowed anteriad, inner margin rounded, impressed below margin of metaventrite. Tibiae straight. Abdomen with strigulate microsculpture, very finely and sparsely punctate; submetacoxal areas 0.05 mm, about as half of intervals to apical margin of sternite 1, submetacoxal lines convex, coarsely punctate.

M a l e: Protarsomeres 1 to 3 weakly widened. Aedeagus ( Figs 170-173 ) 0.57-0.62 mm long, symmetrical, fairly strongly sclerotized. Apical process of median lobe robust, inflexed in apical section only, strongly narrowed toward apex, apex truncate. Articular process inconspicuous, not prominent. Parameres conspicuously wide, with large membranous lobes; upper margin convex in lateral view. Internal sac with flattened, long rods, two admesal bunches of long spines, and basal membranous vesicle.

E t y m o l o g y: The species epithet is formed by the Latin pseudo, meaning not true, and kalabitum, the name of a closely related species (which is derived from Kalabit, the name of a Bornean tribe).

Comparative notes: The aedeagal characters suggest close relationships with S. kalabitum LÖBL, 1986, from Sabah. The new species is distinguished by its smaller body-size, the elytra lacking light subbasal spots and apical bands, and the internal sac of the aedeagus bearing admesal bunches of sclerotized spines.

Figures

Figs 169 - 176: Aedeagi of Scaphisoma; (169), S. ochropenne nov. sp., in lateral view, scale = 0.2 mm; (170), ditto, apical process of median lobe, lateral view, scale = 0.05 mm; (171, 172), S. pseudokalabitum nov. sp., in dorsal and lateral views, scale 0.1 mm; (173), paramere in ventral view, scale = 0.1 mm; (174, 175), S. sinuatum nov. sp., in dorsal and lateral views, scale 0.1 mm; (176), S. stigmatipenne HELLER, in lateral view, scale = 0.1 mm.