Scaphisoma maculosum, 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 : 1372-1373

5.2.7.11. Scaphisoma maculosum nov.sp. ( Figs 20 , 91, 92 )

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. 95 I. Löbl, fungi on logs (MHNG). Paratypes: with the same data as the holotype, 7 66, 2♀♀ (MHNG, BZLA).

D e s c r i p t i o n: Length 1.0-1.10 mm, width 0.75-0.82 mm. Head and most of body light brown. Elytra each with large, yellowish, not well delimited spot covering most of discal surface; areas along margins and sutural striae about as pronotum. Mesoventrite, metaventrite and sternite 1 usually darkened, apical abdominal segments and appendages yellowish. Pronotum and elytra not microsculptured and not iridescent. Length/width ratio of antennomeres as: III 15/6: IV 27/5: V 35/5: VI 29/6: VII 45/9: VIII 40/7: IX 48/8: X 45/8: XI 53/9. Pronotum very finely and densely punctate, punctures hardly visible at 30 times magnification, lateral contours evenly rounded, lateral margin carinae barely visible in dorsal view, lateral striae very finely punctate. Exposed tip of scutellum minute. Elytra with lateral margin carinae not or barely visible in dorsal view, apical margins slightly rounded, inner apical angles not prominent, situated in level with outer angles; sutural margin not raised, sutural striae shallow, shortly bent at base, not extending along basal margins, almost parallel from level of tip of scutellum to apices, impunctate; adsutural areas narrow, with few very fine punctures. Lateral striae very finely punctate. Discal punctation very fine, similar to pronotal punctation. Hypomera smooth. Hind wings well developed. Mesepimera slightly longer than intervals to mesocoxae, and about three times as long as wide. Metaventrite very finely punctate, not microsculptured, in median part flattened, lacking apicomedian impressions; antecoxal puncture rows absent. Submesocoxal areas 0.07 mm, slightly shorter than intervals to apical margin, submesocoxal lines strongly convex, indistinctly punctate. Metanepisterna flat, wide, not narrowed anteriad, inner margin straight, suture deep. Tibiae straight. Abdomen with distinct strigulate microsculpture, very finely punctate. Sternite 1 with submetacoxal areas about 0.08 mm, about as intervals to apical margin, submetacoxal lines strongly convex, with distinct marginal punctures.

M a l e: Protarsomeres 1 to 3 moderately widened. Aedeagus ( Figs 91, 92 ) 0.32-0.34 mm long, symmetrical, weakly sclerotized. Apical processes of median lobe much shorter than basal bulb, inflexed, with ventral side concave, tapering and with acute tip in lateral view, in dorsal view parallel-sided posterior basal bulb, narrowed apically, with blunt apex; articular processes prominent, angular in lateral view, notched in dorsal view. Parameres short, reaching beyond tip of median lobe, almost evenly wide and straight with in lateral view, narrowed in subapical section in dorsal view. Internal sac tubular, with fine denticular structures forming dense rows along lateral margins.

E t y m o l o g y: The species epithet is a Latin adjective meaning maculate.

Co mpar a tive note s: This species may be easily distinguished from allied by its small body-size, combined with the elytral coloration and the comparatively very large submesocoxal and submetacoxal areas.

Figures

Figs 14 - 21: Habitus of Scaphisoma; (14), S. furcillatum nov. sp.; (15), S. inopportunum nov. sp.; (16), S. lunabianum nov. sp.; (17), S. inexspectatum nov. sp.; (18), S. luteomaculatum PIC; (19), S. luteopygidiale (PIC); (20), S. maculosum nov. sp.; (21), S. mindanaosum PIC. Scale: 1.0 mm.

Figs 89 - 94: Aedeagi of Scaphisoma in dorsal and lateral views; (89, 90), S. lunabianum nov. sp.; (91, 92), S. maculosum nov. sp.; (93, 94), S. maramag nov. sp. Scale = 0.1 mm.