Scaphisoma ochropenne, 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 : 1410-1411

5.2.18.6. Scaphisoma ochropenne nov.sp. ( Figs 24, 168-170 )

T y p e m a t e r i a l: Holotype 6: Meran, E. slope Mt. Apo, Davao Province, Mindanao 6000 ft; XI: 5: 46 / Lot 100 in polypore 39: Fomes applanatus / CNHM-Philippine Zool. Expedition (1946-47) F.G. Werner leg. (FMNH). Paratypes: Mindanao, with the same data as the holotype, 4 66, 7 ♀♀ (FMNH, MHNG, BZLA): with the same data but on decaying fleshy gilled bracket fungus, 1 6 (FMNH); with the sama data but 7.XI.46, original forest, lot 116 Polypore 47 Polyporus durus Jungh., 2♀♀ (FMNH, MHNG); same data as preceding but Lot 117, polypore 48 ex Fomes applanatus, 3 66, 1 ♀ (FMNH, MHNG); same data but 8.XI.46, Lot 120 polypore 51 Fomes applanatus, 3♀♀ (FMNH, MHNG); same data but 5-9.XI.46, original forest, Lot 131 decayed woody polypores, 1 6 (FMNH); Mindanao, Cotabato Prov., Burungkot, Upi, 1500 ft., 1- 9.I.47 Lot 154 taken on polypores, leg. F.G. Werner, 1♀ (FMNH).

Description: Length 1.35-1.53 mm, width 0.92-1.02 mm. Head, thorax and sternites 1 and 2 reddish-brown. Elytra, apical abdominal segments and appendages lighter, ochreous. Pronotum and elytra not microsculptured and not iridescent. Length/width ratio of antennomeres as: III 15/8: IV 30/5: V 45/6: VI 40/6: VII 49/14: VIII 40/10: IX 50/13: X 48/13: XI 56/14. Pronotum very finely and fairly densely punctate, with lateral contours evenly rounded, lateral margin carinae usually visible in dorsal view, lateral striae distinctly punctate. Exposed tip of scutellum minute. Elytra with lateral margin carinae usually entirely visible in dorsal view, apical margins hardly rounded, inner apical angles not prominent, situated somewhat posterior or in level of outer angles; sutural margin not raised, sutural striae deep, often starting somewhat posterior level of scutellum, not bent at bases, parallel toward apices, distinctly punctate; adsutural areas narrow, flat, densely and finely punctate, lateral striae distinctly punctate. Elytral disc with punctation dense and coarse on entire surface, puncture rows fairly distinct, puncture intervals mostly about as large to twice as large as puncture diameters. Hind wings fully developed. Hypomera and mesanepisterna smooth. Mesepimera somewhat longer than 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 exceeding onto areas between mesocoxae and metacoxae, absent from lateral parts of metaventrite; punctation on prevailing surface of metaventrite very fine and sparse; antecoxal puncture rows present, in impressed lines. Submesocoxal areas 0.03 mm, about as sixth of intervals to metacoxae, submesocoxal lines convex, distinctly punctate. Metanepisternum convex, hardly narrowed anteriad, inner margin rounded, impressed below margin of metaventrite. Tibiae straight. Abdomen with strigulate microsculpture, very finely punctate; sternite 1 with punctation sparse except on basomedian area; submetacoxal areas 0.05 mm, about as third of intervals to apical margin of sternite 1, submetacoxal lines convex, distinctly punctate.

M a l e: Protarsomeres 1 to 3 weakly widened. Aedeagus ( Figs 168-170 ) 0.62-0.64 mm long, symmetrical, fairly strongly sclerotized. Apical process of median lobe strongly inflexed, curved in lateral view, at apex truncate and hook-like. Articular process inconspicuous, not prominent. Parameres irregularly narrowed toward mid-length, at middle bent, in apical halves evenly wide, each bearing large, fairly narrow membranous lobe. Internal sac with pair of robust, sinuate apical sclerites, and basal and central parts membranous and covered by denticulate and scale-like structures.

E t y m o l o g y: The species epithet refers to the ochreous colour of the elytra.

Comparative notes: The shape of the apex of the median lobe of the aedeagus is diagnostic. In addition, the species is well characterized by the internal sac with a pair of robust, apical sclerites. The species may be readily distinguished from members of the group by its colour pattern.

Figures

Figs 162 - 168: Aedeagi of Scaphisoma; (162, 163), S. inexspectatum nov. sp., in dorsal and lateral views, scale = 0.1 mm; (164, 165), S. inflexum nov. sp., in dorsal and lateral views, scale = 0.1 mm; (166), ditto, parameres in ventral view, scale = 0.1 mm; (167), S. luteopygidiale (PIC), in lateral view, scale = 0.1 mm; (168), S. ochropenne nov. sp., in dorsal view, scale = 0.2 mm.

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.