Scopaeus velifer Frisch 2022, spec. nov.
Creators: name: Frisch, Johannes
name: Narakusumo, Raden Pramesa
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Scopaeus
Scopaeus velifer

description: Scopaeus velifer Frisch, spec. nov.
(Figs 17, 42, 98– 100, 135, 169)
Type specimens: Indonesia: Holotype ♂, Banten, Lebak: Citorek Kidul (06°44’51’’S, 106°19’13’’E), 870 m, 23.5.2016, leg. Frisch (MZB). Paratypes: 1 ♂, 4 ♀, same data as holotype (MFNB, MZB).
Description: Habitus and coloring as in Fig. 17. Head subquadrate. Penultimate antennal segment quadrate. Mesotibia moderately thickened. Forebody surface matt with dense, rugulose, setose punctation; abdomen somewhat shiny; microreticulation absent. Pubescence of body surface short, decumbent, without conspicuous macrosetae. Body dark brown with slight, reddish tinge except for yellow-brown tip of abdomen and appendages; antennae unicolorous yellow-brown, or with scapus medium brown and median segments, beginning with pedicellus, with black tinge, but gradually lighter towards yellow-brown terminal segments; maxillary palpi unicolorous yellow-brown or with darker penultimate segment; femora darker brown in variable extent, gradually lighter towards distal ends. Total body length 2.7 – 3.4 mm; forebody length 1.6 – 1.8 mm.
Male: Abdominal sternite VII with unmodified posterior margin. Abdominal sternite VIII with two lateral, narrow, deep, triangular incisions occupying almost posterior half of sternite length; subbasal ridge of sternite angled projecting posteriad (Fig. 135). Aedeagus (Figs 42, 98 – 100) about 0.6 mm long, with conspicuous, unique, subcircular, lateral structure, here termed velum, made up of translucent membrane studded with numerous microsetae, stretched between aedeagus and extremely lengthened flagellum accompanied by outer, thin, sclerotized ring and two inner, yellow stripes (Figs 99, 100); flagellum thin, filamentous, arising from strongly sclerotized median structure of aedeagus dextroproximad, running dorsally across phallobase and widely sinistrad of aedeagus, and projecting from apex of apical lobes ventrally, seemingly attached to velum sinistroproximally (Figs 42, 98, 99); apical lobes strongly curved ventrad, tapered towards wide, truncate apex, with subacute, ventral extension (Figs 42, 98), in proximal portion widened laterally with stout, lateroapicad pointing tooth, in distal portion convexly widened laterally and strongly tapered towards narrow, short, subtruncate apices (Figs 99, 100); dorsal lobe with membranous apex (Fig. 100); lateral lobes marked by numerous, short, spacious setae (Fig. 99), slightly convex in ventral view (Fig. 99); ventral lobe slender, narrowed in middle, somewhat widened towards subacute apex and reaching apical lobes (Figs 42, 98); small, narrow lobe projecting ventrally distal of ventral lobe (Fig. 98: arrow I); median foramen conspicuously large and wide, longer than half of phallobase, limited distally by weakly sclerotized, straight transverse ridge (Fig. 99).
Female: Chamber segment of sperm pump without apophysis (Fig. 169); bursa membranous.
Distribution: Scopaeus velifer is known only from the type locality at the western edge of Mount Halimun-Salak National Park.
Etymology: The epithet velifer [adjective, Latin, composed of the noun velum (sail) and the verb ferre (to carry, to bring)] addresses the peculiar, dorsolateral ‘sail’ of the aedeagus of this species (Figs 42, 98 – 100).
description: Published as part of Frisch, Johannes & Narakusumo, Raden Pramesa, 2022, Revision of Scopaeus Erichson, 1839 (Coleoptera, Staphylinidae, Paederinae) of Indonesia, with description of 19 new species, pp. 23-73 in Soil Organisms 95 (1) on page 53, DOI: 10.25674/so95iss1id311, http://zenodo.org/record/10724236