Kateretes takagii, S-T.Hisamatsu, 2006

Hisamatsu, Sadatomo, 2011, A review of the Japanese Kateretidae fauna (Coleoptera: Cucujoidea), Acta Entomologica Musei Nationalis Pragae 51 (2), pp. 551-585 : 558-560

Kateretes takagii S-T. Hisamatsu, 2006

( Figs. 1C–D , 4 )

Kateretes takagii S-T. Hisamatsu, 2006: 245. Type locality: Japan, Hokkaido, Kitami, Piashiri moore.

Type material examined. HOLOTYPE ( EUM):J, ‘J // [HOKKAIDO] / Piasiri moore / Kitami , 4.viii.1972 / S. Takagi // HOLOTYPE / Kateretes / takagii / S-T. Hisamatsu / 2006’. PARATYPES ( EUM): 9 JJ 4 ♀♀, Piasiri moore, Kitami, Hokkaido, 4.vii.1972, S. Takagi leg.

Diagnosis. Body coloration black; antennae, mouthparts, clypeus, explanate lateral margins of pronotum, elytra (except for black obtriangular patches from humerus to basal 1/2 of suture), and legs reddish brown ( Fig. 1C ). Scape of male antennae strongly enlarged and widest at middle ( Fig. 4D ). Prosternal process narrowing to apex. Protibiae 2.83–3.02 times as long as wide (n = 4).

Redescription. Length 2.2–2.6 mm (2.6 mm in holotype).

Male. Body ( Fig. 1C ) oval, rather flattened, strongly shininging, sparsely covered with yellowish setae. Coloration black; antennae, mouthparts, clypeus, explanate lateral margins of pronotum, elytra (except for black obtriangular patches from humerus to basal 1/2 of suture), and legs reddish brown.

Head densely punctate, punctures larger than eye facet, separated by <1 diameter; interspaces finely reticulate. Frontoclypeal suture incomplete, distinctly visible. Front margin of clypeus with medial arcuate emargination. Labrum broadly notched at middle. Mandibles strongly bent inward. Antennae ( Fig. 4D ) stout, 1.56 times longer than HW (n = 1); scape strongly enlarged, widest at middle; pedicel moderately enlarged, pyriform to spherical; approximate ratio of each segment (n = 1) is 3.71: 2.00: 1.71: 1.29: 1.14: 1.29: 1.14: 1.00: 1.43: 1.43: 2.14.

Pronotum strongly transverse, 1.65–1.81 times as wide as long (n = 3); lateral margins narrowly explanate, weakly serrate, widest at basal 1/3; anterior angles not prominent; posterior angles broadly rounded; anterior margin nearly straight or with slight curvature, not bordered; basal margin bordered; punctures on disc about as large as those on head, separated by ≤ 1 diameter; interspaces finely reticulate.

Elytra conjointly 1.10–1.16 times as long as wide (n = 3), 1.97–2.09 times as long as pronotum (n = 3), subparallel-sided; punctures on disc larger and denser than those on pronotum; interspaces smooth. Abdominal tergite VI partially obscured by elytra. Abdominal tergite VII fully exposed, apex rounded. Abdominal tergite VIII not externally visible.

Prosternum (excluding prosternal process) slightly shorter than greatest width of protibia, 0.46 times as long as mesoventrite, 0.33 times as long as metaventrite (n = 1); prosternal process slender, narrowing to apex. Mesoventrite depressed below the level of the metaventrite, rugose, unpunctate. Metaventrite convex, metathoracic discrimen only in basal 1/3; disc slightly rugose, covered with sparsely setae; punctures on disc sparse, apparently smaller than those on head, separated by 2 to 3 times a diameter. Inter-mesocoxal distance separated by 2.31 times width of inter-procoxal distance. Inter-metacoxal distance separated by 5.77 times width of inter-procoxal distance. Abdominal sternites shining; approximate (n = 1) of length of abdominal sternites III–VII (n = 1) is 2.88: 1.13: 1.00: 1.63: 2.38. Legs flattened; tibiae dilated apically; protibiae ( Fig. 4F ) 2.83–3.02 times as long as wide (n = 4); tarsal claws more or less expanded at base.

Male genitalia sclerotized; tegmen ( Fig. 4A ) with parameres symmetrical, wide and long (L: W = 2.12 (n = 1)), interparameral lobe sclerotized, sharply pointed; apex of median lobe ( Fig. 4C ) moderately curved inward in lateral aspect.

Female. Antennal segments I–II less strongly enlarged than those of male. Ovipositor similar in shape to K. japonicus , styli distinct.

Bionomics. Unknown.

Distribution. Japan (Hokkaido) (S-T. HISAMATSU 2006).

Figures

Fig. 1. Habitus and labels of Kateretidae spp. A–B – Kateretes japonicus Hisamatsu, 1985: A – holotype, male; B – ditto, labels; C–D – Kateretes takagii S-T.Hisamatsu, 2006:C – holotype, male; D – ditto, labels; E–F – Platamartus jakowlewi Reitter, 1892: E – male and F – female (both Tochigi Pref.); G–H – Heterhelus (Heterhelus) japonicus (Reitter, 1878): G – lectotype, male; H – ditto, labels. Scale bars = 1.0 mm.

Fig. 4. Kateretes takagii S-T. Hisamatsu, 2006. A – tegmen (ventral view); B – median lobe (ventral view); C – median lobe (lateral view). D–E – antennal segments 1–2 (lateral view): D – male, E – female. F – right protibia; G – ovipositor.A–G = Hokkaido, Piasiri moore.