Baeocera abnormalis Nakane, 1963

Ogawa, Ryo & Löbl, Ivan, 2013, A revision of the genus Baeocera in Japan, with a new genus of the tribe Scaphisomatini (Coleoptera, Staphylinidae, Scaphidiinae), Zootaxa 3652 (3), pp. 301-326 : 317-318

Baeocera abnormalis Nakane, 1963

( Figs. 5 , 14 , 27, 52, 59, 65, 77 left, 82)

Baeocera abnormalis Nakane, 1963a: 22 ; Nakane, 1963b: 79; Löbl, 1984b: 188; Morimoto, 1985: 258. Eubaeocera abnormalis: Löbl, 1969: 337 .

Diagnosis. Antennomere III slightly longer than IV; XI about 1.2 times as long as III. Elytral punctuation becoming gradually finer toward apex. Lateral portion of metaventrite sparsely and coarsely punctuate. Ventrite I sparsely and coarsely punctuate. Parameres symmetrical; inner sac with complex of sclerites. Distal gonocoxite normal and slender.

Redescription. Body oval, shining. Pronotum and elytra black to dark reddish-brown; apical portion of elytra reddish-brown; frons and labrum reddish-brown; maxillary palpi, tarsi and antennomeres I and II reddish-brown; antennomeres III–VI yellowish-brown; antennomeres VII–XI dark yellowish-brown; head black. Head, pronotum and elytra sparsely and finely pubescent.

Head with interocular distance about twice as eye width. Punctuation sparse and fine. Antennomeres I–VI with a few macrosetae, VII–XI covered with some macrosetae; IV longer than III; XI about 1.2 times as long as III (Fig. 27).

Pronotum wider than long, lateral keel distinct except near basal angles. Punctuation sparse and fine, as on head. Scutellum almost as long as wide, with exposed apex.

Elytra slightly longer than wide, widest at basal fourth, lateral margins gradually narrowed forward apex, and without serrate at inner part of posterior margin. Punctuation gradually coarser and more sparse from basal fourth to apex. Sutural striae extending outwards along basal margin to form complete basal stria joined to lateral striae.

Propygidium and pygidium sparsely and finely punctuate; pygidium gradually narrower toward apex, with 2 macrosetae.

Hypomeron impunctate. Mesoventrite sparsely and finely punctuate, as pronotum. Lateral portion of metaventrite sparsely and coarsely punctuate. Mesepimeron about twice as long as wide. Mesocoxa about twice as wide as interspace between mesocoxa; mesocoxal area narrow. Metepimeron almost as long as wide. Metacoxa about twice as wide as metacoxal process. Metanepisternum about four times as long as wide. Ventrite I with 4 macrosetae, sparsely and coarsely punctuate; V with 8 macrosetae, sparsely and finely punctuate, and concave at middle portion of apex.

Meso- and metafemora with microsculpture, sparsely and coarsely punctuate.

Male. Aedeagus about 0.35 mm long; parameres symmetrical; inner sac with rod-like sclerites.

Female. Distal gonocoxite normal and slender; vagina membranous, without robust sclerites; bursa copulatrix not sclerotized. Spermatheca as Fig. 59 .

Measurements (n = 3). Length (PL+EL): 1.88–1.94 mm; width (PW, EW): 1.00– 1.05 mm, 1.10–1.13 mm. PL/PW: 0.65–0.73; EL/EW: 1.07–1.08. HW: 0.43–0.44 mm. ID: 0.21 mm.

Approximate ratio of each antennal length (width) as follows (n = 1); 1.2 (0.7): 1.0 (0.6): 1.0 (0.3): 0.9 (0.3): 1.0 (0.2): 0.8 (0.3): 1.0 (0.3): 0.8 (0.3): 1.1 (0.4): 1.0 (0.5): 1.2 (0.5).

Specimens examined. 13, 1ex., Akamedaki, Mie Pref., 5. V. 1974, T. Kinoshita leg.; 13, Obinata, Minakamimachi, Gunma-ken, alt. 500 m, litter, 36°46’ 32” N – 36°46’ 38” N, 138°58’ 13” E – 138°58’ 12” E, 6. VI. 2008, S. Sejima leg.; 1Ƥ., Myoto-ike, Mt. Tsurugi, Tokushima Pref., alt. 1500 m, in litter, 11. VII. 1993, M. Sakai leg. (All preserved in EUMJ).

Distribution. Japan: Honshu, Shikoku, Kyushu.

Figures

FIGURES 2 – 10. Habitus in dorsal view of the Japanese Baeocera. 2, B. frater; 3, B. myrmidon; 4, B. sordida; 5, B. abnormalis; 6, B. caliginosa; 7, B. curtula; 8, B. nakanei; 9, B. takizawai; 10, B. satana. Scales: 1.0 mm.

FIGURES 11 – 23. Habitus in lateral view of the Japanese Baeocera, and Baeoceroxidium micros (20, 21) and Baeocera falsata (22, 23). 11, B. frater; 12, B. myrmidon; 13, B. sordida; 14, B. abnormalis; 15, B. caliginosa; 16, B. curtula; 17, B. nakanei; 18, B. takizawai; 19, B. satana; 20, 22, dorsal view; 21, 23, lateral view. Scales: 1.0 mm.

FIGURES 58 – 61. Spermathecae and the apertures. 58, Baeocera caliginosa; 59, B. abnormalis; 60, B. nakanei; 61, B. satana. Allows: opening portions of spermathecae on the vagina. Scales: 0.1 mm.