Elacatophora kerinciana, Jałoszyński, 2020

Jałoszyński, Paweł, 2020, Four new species of the Oriental genus Elacatophora L. W. Schaufuss (Coleoptera Staphylinidae, Scydmaeninae), Zootaxa 4834 (2), pp. 264-272 : 268-270

Elacatophora kerinciana sp. n.

( Figs 3 , 13–16 )

Type material. Holotype: INDONESIA (Jambi Province): ♂, two labels: “ SUMATRA: Jambi / Mt. Kerinci , 17750- / 1850 m, 11-12.XI. / 1989 Agosti, Löbl / Burckhardt # 11” [white, printed]; “ Elacatophora / kerinciana m. / P. Jałoszyński, 2020 / HOLOTYPUS ” [red, printed] ( MHNG) . Paratypes: 1 ♀, same data as holotype ; 1 ♀, same data except for 1900 m, 13.XI.1989, and #15a (cPJ, MHNG) .

Diagnosis. BL> 1.5 mm but <2 mm; pronotal antebasal transverse groove entire; antennal club composed of antennomeres 7–11 and strongly thickening distad; mesotibiae in males strongly curved; aedeagus in ventral view moderately slender, oval, in lateral view with apical projections strongly bent dorsad, endophallic sclerites occupying basal half of capsular portion of median lobe, parameres in lateral view slightly constricted in subapical region.

Description. Body ( Fig. 3 ) moderately slender with flattened pronotum and elytra, light brown, covered with yellowish setae; BL 1.51 mm.

Head broadest at moderately large, weakly convex and coarsely faceted eyes, HL 0.29 mm, HW 0.31 mm; vertex and frons convex, together elongate but not rectangular; supraantennal tubercles barely marked. Punctures on frons and vertex inconspicuous; setae sparse, long and suberect, bristles relatively thin and barely differing from ‘regular’ setae, directed posterad and dorsoposterad. Antennae long and slender, with indistinctly delimited club composed of antennomeres 7–11, AnL 0.85 mm, antennomeres 1–2 each strongly elongate, 3 indistinctly transverse, 4–7 each indistinctly elongate, 8 about as long as broad, 9–10 each slightly transverse, 11 distinctly broader than 10, about as long as 9–10 combined, about 1.5 × as long as broad, oval and distinctly asymmetrical.

Pronotum subconical, broadest at base; PL 0.38 mm, PW 0.41 mm; anterior and lateral margins in anterior half nearly straight, sides in posterior half slightly convex; posterior margin arcuate; pronotal base with particularly deep, entire transverse groove connecting small and diffuse lateral pits, and with separated from groove lateral pair of small and indistinct impressions. Punctures on pronotal disc fine and inconspicuous; disc with long and relatively dense suberect setae, sides with sparse, long but relatively thin bristles little differing from ‘regular’ setae.

Elytra oval, broadest near anterior third; EL 0.85 mm, EW 0.70 mm, EI 1.21; humeral calli weakly developed, basal impressions moderately large and deep, distinctly elongate; apices separately rounded. Punctures on elytra as inconspicuous as those on pronotum; setae long, relatively dense, suberect. Hind wings well developed.

Legs moderately long and slender, pro- and metatibiae almost straight, mesotibiaae strongly curved.

Aedeagus ( Figs 13–16 ) in ventral view moderately slender, oval; AeL 0.23 mm; apical portion so strongly bent dorsad that not visible in ventral view; endophallus in ventral view with two pairs of bunches of moderately long needle-like sclerites, and additionally with one similar, but shorter median basal group of sclerites; parameres long, in lateral view slightly constricted in subapical region, each with two apical setae.

Female. Externally similar to male, but with slightly smaller eyes and mesotibiae indistinctly, evenly curved; BL 1.59–1.66 mm; HL 0.29–0.30 mm, HW 0.30–0.31 mm, AnL 0.73–0.75 mm; PL 0.38–0.39 mm, PW 0.40 mm; EL 0.93–0.98 mm, EW 0.73–0.78 mm, EI 1.26–1.28.

Distribution. Central Sumatra ( Fig. 21 ).

Etymology. Named after Mount Kerinci in Indonesia.

Remarks. Elacatophora kerinciana has middle-sized adults, reaching BL around 1.5 mm in males and slightly more, up to 1.66 mm in females. Externally, it is a relatively unremarkable species, although the conspicuously long, dense, and somewhat ‘wooly’ vestiture of setae and strongly curved mesotibiae in males is a combination of characters unique for E. kerinciana . The aedeagus of this species resembles that of E. longipes Jałoszyński, 2004 , but males of E. longipes are significantly larger (BL 2.16–2.26 mm), and have a different arrangement of needle-like sclerites of the endophallus.

Figures

FIGURE 21. Distribution of nominal Elacatophora species. Collecting locality for Elacatophora soesilae is known only as “central Java”.

FIGURES 1–4. Dorsal habitus of a paratype female (1) and holotype males (2–4). Elacatophora thailandiana sp. n. (1); E. jambiana sp. n. (2); E. kerinciana sp. n. (3); E. indica sp. n. (4).

FIGURES 13–20. Aedeagus in ventral (13, 15, 17, 19) and lateral (14, 16, 18, 20) views. Elacatophora kerinciana sp. n. (13–16); E. indica sp. n. (17–20).