Baconia reposita, Caterino, Michael S. & Tishechkin, Alexey K., 2013

Caterino, Michael S. & Tishechkin, Alexey K., 2013, A systematic revision of Baconia Lewis (Coleoptera, Histeridae, Exosternini), ZooKeys 343, pp. 1-297 : 176-178

Baconia reposita sp. n. Figs 49 E–FMap 15

Type locality.

THAILAND: Thung Yai Wildlife Sanctuary [15.50°N, 98.80°E].

Type material.

Holotype female: "W.THAILAND: 300m., Thung Yai Wildlife Sanctuary. 15°30'N - 98°48'E" / "Tak Province, Umphang District, Mae Chan/Mae Klong confluence. 27. iv–6.v.1988” / "oak/bamboo forest. M.J.D.Brendell. B.M.1988-183" / "Caterino/Tishechkin Exosternini Voucher EXO-00649" (BMNH). Paratypes (4): 1: same data as type; 3: THAILAND: Tak: Umphang, Thung Yai Wildlife Sanctuary, Song Bae Stream, 15°28'N, 98°48'E, 300 m, 18-27.iv.1988, evergreen rainforest, M. Brendell (BMNH, MSCC).

Diagnostic description.

Length: 1.7-1.8mm, width: 1.2-1.3mm; body elongate oval, subdepressed, glabrous; color darkly rufopiceous, with faint bronzy sheen; head with frons flat, wide, sparsely punctate, punctures slightly denser dorsad, frontal stria present only along inner margin of eye, obsolete across middle, supraorbital stria absent; antennal scape short, club slightly oblong; epistoma straight to faintly emarginate apically; labrum about 4 ×wider than long, weakly emarginate apically; both mandibles with strong, acute basal tooth; pronotum with sides weakly convergent, rounded to apex, lateral marginal stria complete, continuous anteriorly with complete anterior marginal stria, marginal bead moderately wide, lateral submarginal stria present in basal three-fourths, pronotal disk weakly depressed in anterolateral corners, with fine ground punctation and coarse secondary punctures almost uniformly interspersed, slightly sparser toward antescutellar region; elytra with two complete epipleural striae, outer subhumeral stria absent, inner absent or weakly impressed at extreme base, dorsal striae 1-4 complete to base, progressively shortened apically, 4th stria distinctly arched toward base of 5th in front, stria 5 slightly abbreviated at base and apex, sutural stria present in middle one-third, abbreviated at base and apex, elytral disk with scattered secondary punctures in apical one-third, extending slightly further basad toward suture; prosternum moderately broad, keel weakly emarginate at base, with carinal striae extending nearly to anterior margin, separate; prosternal lobe about two-thirds keel length, apical margin broadly rounded, with marginal stria well impressed only at middle; mesoventrite somewhat broadly emarginate, but weakly produced at middle, with marginal stria interrupted for width of prosternal keel; mesometaventral stria arched forward, subangulate at middle, continuous laterally with inner lateral metaventral stria which extends straight posterad to inner corner of metacoxa, outer lateral metaventral stria short, slightly oblique; metaventral disk coarsely punctate at sides, impunctate at middle; abdominal ventrite 1 with single lateral stria, disk with coarse secondary punctures at sides and fine secondary punctures across posterior margin of middle portion, ventrites 2-5 with sparse secondary punctures at sides, the punctures becoming sparser and finer at middle; protibia tridentate, the middle tooth closer to apical than basal, outer margin serrulate between teeth; mesotibia with two very weak marginal spines; outer metatibial margin smooth, edentate; propygidium lacking basal stria, with sparse, fine ground punctation, with secondary punctures larger and denser toward base, propygidial gland openings thin, elongate, located about one-third behind anterior margin, about one-fourth width from each lateral margin, propygidium impunctate in immediate vicinity; pygidium with sparse ground punctation and slightly coarser, secondary punctation denser toward base. Male: not known.

Remarks.

This species can be distinguished from the other Asian species by the fine, anteriorly angulate mesometaventral stria displacing the middle part of the marginal mesoventral stria (Fig. 49F), the short outer lateral metaventral stria, and the almost uniformly punctate pronotum (Fig. 49E). It is very closely related to Baconia barbarus , as discussed above, but is consistent in the differences noted. Discovery of males of both species would greatly help confirm their distinctness.

Etymology.

This species name means 'far away’ or ‘remote’, referring to this Asian outpost of Baconia diversity.