Agathidium (Macroceble) cochleariforme, Švec, 2012

Švec, Zdeněk, 2012, New Leiodinae (Coleoptera: Leiodidae) from India and Papua New Guinea, Acta Entomologica Musei Nationalis Pragae 52 (2), pp. 411-424 : 414-415

publication ID	https://doi.org/ 10.5281/zenodo.5331202
DOI	https://doi.org/10.5281/zenodo.5398900
persistent identifier	https://treatment.plazi.org/id/297B87BC-A27E-FFCD-FEFF-6685FBDEAD9B
treatment provided by	Diego
scientific name	Agathidium (Macroceble) cochleariforme
status	sp. nov.

Treatment

Agathidium (Macroceble) cochleariforme View in CoL sp. nov.

( Figs. 3–5 View Figs , 20, 21 View Figs 18–29 )

Type locality. India, Arunachal Pradesh, 1.5 km NE of Bomdila near Bomdilla pass, 27º16′34″N 92º25′49″E, 2600 m a.s.l.

Type material. HOLOTYPE: J ( NMPC): ‘ INDIA: Arunachal Pradesh (14) / 1.5 km NE of Bomdila ,nr. Bom- / dila pass, 2.–5.v.2008, 2600 m / 27º16′34″N 92º25′49″E / Fikáček, Podskalská, Šípek lgt. // dense evergreen bushes on / slopes (Rhodod., Pieris etc.) / sifting: wet leaf litter’ GoogleMaps . PARATYPES: 3 ♀♀ ( NMPC, ZSPC): same data as the holotype.

Description. Body length 1.9–2.0 mm (holotype: 2.0 mm). Length of body parts (holotype): head 0.4 mm, pronotum 0.8 mm, elytra 0.8 mm, antenna 0.8 mm. Maximum width of body parts (holotype): head 1.0 mm, pronotum 1.2 mm, elytra 1.2 mm.

Body shortly oval ( Fig. 20 View Figs 18–29 ), head and pronotum light chestnut coloured, elytra chestnut coloured. Venter yellow-reddish. Legs and antennae yellow-red. Dorsum without microreticulation; punctuate, punctures regularly arranged, each with very short and fine seta.

Head. Maximum width of head at middle of eyes. Eyes flat, 5 times as long as wide in dorsal view. Clypeus very feebly and flatly emarginate, clypeal line absent. Dorsal surface with very sparse scattered fine punctures separated by more than 10× of their diameters. Left mandible without any horn. Small bump present above antennal articulation. Relative length of antennal segments III: II = 1.5.

Pronotum. Widest at basal third. Lateral sides roundly tapered to anterior corners in dorsal view; broadly rounded in lateral view ( Fig. 21 View Figs 18–29 ). Puncturation as that of head.

Elytra. Broadest approximately at basal fourth. Punctures larger than on head and pronotum, separated by more than 10× their diameter. Sutural stria absent.

Legs. Protarsomere I a little enlarged in male. Tarsi slender in female. Femora and tibiae slender. Hind femora with small thin, pointed tooth close to midlength of posterior margin, Female femora simple. Tarsal formula: 5-5- 4 in male, 4-4- 4 in female.

Mesoventrite. Low, slightly developed longitudinal mesoventral carina present; lateral lines not developed.

Metathoracic wings absent.

Metaventrite. Femoral lines absent. Male with horn-shaped ventro-caudally oriented process at posterior margin between coxae.

Genitalia. Aedeagus as in Figs. 3–4 View Figs . Operculum broadly U-shaped. Spermatheca as in Fig. 5 View Figs .

Variability. The length ratio of the antennal segments III: II varies between 1.4–1.6 in the type specimens; the ratio of the length:width of the eyes in dorsal view varies between 5–6. The dorsum of one of the paratypes is slightly chestnut in colour.

Differential diagnosis. Agathidium (Macroceble) cochleariforme sp. nov. resembles A. (Macr.) brancuccii Angelini & DeMarzo, 1981 and A. (Macr.) guttiferum sp. nov. in the size of body, coloration of the antennae, the presence of dorsal puncturation, absence of microsculpture on the dorsum, absence of sutural striae and by the presence of the semivertical process on the metaventrite. The new species differs from A. guttiferum sp. nov. by the shorter antennomere III (the length ratio antennomeres III: II= 1.4–1.6 in A. cochleariforme , while 1.7–1.8 in A. guttiferum sp. nov.), unicolored elytra, well developed eyes in dorsal view and also by the hemisphaerical shape of the basal part of the spermatheca (which is slender in A. guttiferum sp. nov.). It differs from A. brancuccii by the much sparser dorsal puncturation and by the shape of the median lobe that ends in a small process in A. cochleariforme , while it is simply pointed in A. brancuccii . The new species also differs from both A. brancuccii and A. guttiferum by the spoon-shaped distal part of the parameres (in contrast to the simply shaped parameres in both of the latter species).

Etymology. The species name refers to the spoon-shaped distal part of the parameres (cochlear in Latin means a spoon).

Bionomics. Type specimens were collected by the sifting of thick layers of wet leaf litter below dense evergreen bushes of Rhododendron and Pieris (M. Fikáček, pers. comm.).