Scaphisoma flavapex Achard, 1921

Löbl, Ivan, 2023, On the Scaphidiinae (Coleoptera: Staphylinidae) of Java, Indonesia, Acta Musei Moraviae, Scientiae biologicae 108 (1 - 2), pp. 1-34 : 19

Scaphisoma flavapex Achard, 1921

Type material. Lectotype by present designation, female, labelled: Ranoe Koembala Groote Meer. 2000 sl. (handwritten) / Jacobson byden Interoe Java or (handwritten on round label / TYPE (red label, printed) / Museum Leiden Det: (printed) / Scaphosoma flavapex Type (handwritten by Achard) J. Achard det. (printed) / Mus. Nas. Pragae Inv. 18726 (printed on red label) / Scaphisoma flavapex Ach. det Löbl 1975 (printed, flavapex Ach. and 75 handwritten) / Lectotype (red label, printed) / Scaphisoma flavapex Achard det. Löbl, 2023 ( NMPC).

Redescription. Length 2.06 mm, width 1.40 mm. Head, pronotum, most of elytra and abdomen dark reddish­brown. Apical third of elytra yellowish, yellowish area slightly expanded near suture, and more expanded along lateral margin. Venter of thorax lighter than pronotum. Ventrites I and II darker than metaventrite, following ventrites lighter. Femora and tibiae light reddish­brown, tarsi yellowish. Antennomeres I to IV yellowish, following antennomeres light brown. Length/width ratios of antennomeres III 13/10: IV 18 /9: V 34 /10: VI 53 /13: VII 58 /18: VIII 36 /17: IX 50 /15: X 46 /16: XI: 53/18. Pronotum and elytra lacking microsculpture. Pronotum with rounded lateral margins, lateral carinae exposed in dorsal view, except near basal angle; lateral margin stria punctate, discal punctation rather coarse and dense, punctures well delimited, visible at magnification 16 times, puncture intervals mostly two or three times as large as puncture diameters, in part about as large as puncture diameters. Exposed part of scutellum minute, triangular. Elytron weekly narrowed apicad, with lateral margin weakly rounded; lateral margin carina hardly visible in dorsal view; lateral margin stria punctate; apical margin truncate; inner apical angle anterior level of outer apical angle; apical crenulation present; sutural margin raised; sutural stria deep, gradually converging to suture, curved near base, not extending along basal margin; adsutural area flat, near scutellum about 0.08 mm wide, irregularly, very finely punctate; discal punctation very fine near base, finer than pronotal punctation, punctures fairly well delimited, puncture intervals mostly about three to five times as large as puncture diameters. Hind wings fully developed. Hypomeron smooth. Mesanepisternum extremely finely and sparsely punctate, lacking microsculpture. Mesepimeron about five times as long as wide and clearly longer than interval between its tip and mesocoxa. Metaventrite lacking striae or longitudinal impressions, lacking microsculpture, with mesal area slightly convex, nearly evenly densely and finely punctate; antecoxal puncture rows absent. Submesocoxal areas about 0.04 mm long, nearly as long as fifth of shortest interval to metacoxa; submesocoxal lines convex, finely punctate. Metanepisternum flat, lacking microsculpture, narrowing anteriad, with straight suture. Protibiae straight, mesotibiae and metatibiae sligthly curved. Abdomen with strigulate microsculpture and punctation very fine and sparse, finer than punctation on metaventrite. Ventrite I with submetacoxal areas 0.10 mm long, somewhat shorter than third of shortest interval to apical margin of ventrite, submetacoxal lines convex, very finely punctate.

Comments. ACHARD (1921) based the species on an unspecified number of specimens from Smeroe: Ranoe Koembala, Groote Meer (E. Jacobson). The single specimen preserved in the Achard s collection (NMPC) complies with the published data. Its right elytron is broken off and missing. The fixation by the lectotype designation is considered necessary because other similar and sympatric species, not necessarily conspecific syntypes may exist.