Baconia dentipes, 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 : 122-123

Baconia dentipes sp. n. Fig 35BMap 9

Type locality.

PERU: Junín: ~1km N Satipo [11.24°S, 74.65°W].

Type material.

Holotype female: "PERU: Depto. Junín, ~1km N Satipo, Sector San Isidro. 11°14.51'S, 74°38.98'W 730m. Window trap at treefall, 11-12 April 2009. A.V.Petrov" / "Caterino/Tishechkin Exosternini Voucher EXO-00476" (FMNH).

Other material.

BOLIVIA: 1: Cochabamba: Cochabamba, 117 km E, Yungas nr. Rio Carmen Mayu (Cochabamba Villa Tunari Rd.), 17°6'32"S, 65°41'12"W, 1040 m, 6-8.ii.1999, FIT, R. Hanley (CMNC). ECUADOR:1: Orellana: Res. Ethnica Waorani, 1 km S Onkone Gare Camp, Trans. Ent., 0°39'10"S, 76°26'W, 220 m, 3.vii.1994, fogging, mostly bare green leaves, some with covering of lichenous or brophytic plants in terra firme forest, T. Erwin (USNM).

Diagnostic description.

Length: 1.6-1.8mm, width: 1.1-1.2mm; body elongate, parallel-sided, weakly depressed, glabrous; color rufescent, shining; head with frons elevated over antennal bases, slightly depressed at middle, interocular margins convergent dorsad, frontal punctation inconspicuous in anterior half, secondary punctures increasing dorsally, frontal stria absent, supraorbital stria vaguely indicated by serial punctures; antennal scape short, club rounded, slightly expanded apically; epistoma flat, apex truncate; labrum short, flat, about 3 × wider than long, apical margin finely carinate, weakly arcuate; mandibles short, each with median tooth; pronotum with sides subparallel in basal half, rounded to apex, lateral marginal and submarginal striae merging near anterior corner, submarginal stria very close to marginal along side, continued anteriorly around anterior margin, slightly removed from margin above head; pronotal disk narrowly depressed along anterolateral margin, ground punctation fine, very sparse, with small, sparse secondary punctures present in lateral third; elytra with two more or less complete epipleural stria, the outermost may be fragmented or abbreviated, outer and inner subhumeral striae absent, dorsal stria 1 nearly complete, fine, scratchlike in apical half, striae 2-4 progressively more abbreviated apically, 4th stria arched to meet base of sutural stria, 5th stria absent, sutural stria obsolete in apical fourth, elytral disk with small, shallow secondary punctures in apical third, diminishing in size and density anteromedially; prosternal keel narrow, convex between striae, emarginate at base, carinal striae subparallel in basal half, diverging slightly anterad; prosternal lobe about two-thirds keel length, apical margin broadly rounded, marginal stria obsolete at sides; mesoventrite produced at middle, marginal stria complete; mesometaventral stria transverse, distinctly crenulate, continued by inner lateral metaventral stria posterad toward inner third of metacoxa, outer lateral metaventral stria short, just an oblique postmesocoxal fragment; metaventral disk impunctate at middle; abdominal ventrite 1 with inner lateral stria complete, curved mediad apically, outer lateral stria absent, disk impunctate at middle, ventrites 2-5 finely punctate across middle; protibia narrow, with four weak marginal denticles more or less evenly spaced, margin serrulate between; mesofemur weakly dentate at posterolateral corner, posterior marginal stria following margin, well impressed along distal margin; mesotibia with moderately distinct basal bend, two distinct marginal spines; outer metatibial margin smooth; propygidium lacking basal stria, with ocellate secondary punctures separated by slightly more than their diameters, propygidial gland openings present nearly one-half behind anterior margin; pygidium with fine ground punctation, small secondary punctures sparser toward apex. Male: not known.

Remarks.

Although this species is known from only female specimens, its dentate apices of the mesofemur (Fig. 35B) allow it to be easily separated from related species. In addition its frons is quite convex compared to other species in the Baconia angusta group. Given the importance of male genitalia in the group, we refrain from designating females from other localities as paratypes, as males may reveal more significant differences.

Etymology.

The name of this species refers to the dentate apices of the mesofemur.