Baconia navarretei, 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 : 63-64

Baconia navarretei sp. n. Fig. 14DMap 3

Type locality.

UNITED STATES: Arizona: Huachuca Mts. [31.42°N, 110.27°W].

Type material.

Holotype male: "ARIZONA: Cochise Co., Huachuca Mts. Miller Canyon Rec. Ar., 31°25'N, 110°16.5'W, Oak, u/bark 17 July 2001, A.Tishechkin" / "Caterino/Tishechkin Exosternini Voucher EXO-01120" (FMNH). Paratypes (3): USA: Arizona: 1: Cochise Co., Huachuca Mts. Sunnyside Canyon, 5500 ft, 18.vii.1972, R. Curtis (FMNH); 1: Santa Cruz Co., Santa Rita Mts. Madera Cyn, 25.vii.1966, K. Stephan (USNM); 1: Pima Co., Madera Cyn 31.72694°N, 110.88039°W, 20.vii.2012, E.G.Riley (TAMU)

Other material.

MEXICO: 2: Morelos: Tlayacapan, San Jose de los Laureles, BMM, 1768 m, 14.viii.1993, rotting log, G. Quiroz y J. Navarrete (UDGC, MSCC); 1: Morelos: Tlayacapan, San Jose de los Laureles, BMM, 1768 m, 14.viii.1993, rotting log, G. Quiroz y J. Navarrete (AKTC).

Diagnostic description.

Length: 2.4-2.6mm, width: 2.0-2.2mm; body elongate oval, depressed, glabrous; dorsum metallic blue, venter rufopiceous; frons elevated over antennal bases, depressed at middle, ground punctation fine, with few coarse punctures at middle and near vertex, frontal stria present along inner margin of eye, curving inward at front, interrupted over antennal bases, at middle, or both, supraorbital stria vaguely represented by series of punctures; antennal scape short, club broadly rounded; epistoma truncate apically; labrum about 4 ×wider than long, weakly bisinuate along apical margin; both mandibles with acute basal tooth; pronotum with sides weakly arcuate to apex, marginal stria complete along lateral and anterior margins, lateral submarginal stria absent, ground punctation of pronotal disk rather conspicuous, coarse secondary punctures extending across anterior half, becoming more widespread and dense along sides; elytra with two complete epipleural striae, outer subhumeral stria absent, inner subhumeral stria largely complete, but usually interrupted in basal half, dorsal striae 1-3 complete, 4th stria abbreviated from base, present in apical half or more, 5th stria present in apical third, sutural stria present in about apical half, elytral disk with few coarse punctures in apical fourth; prosternum moderately broad, weakly convex, keel weakly emarginate at base, carinal striae complete, subparallel to divergent anterad, separate or united along basal margin; prosternal lobe about one-half keel length, apical margin broadly rounded, marginal stria obsolete at sides; mesoventrite weakly produced at middle, marginal stria complete; mesometaventral stria absent, inner lateral metaventral stria extending from end of marginal mesoventral stria obliquely posterolaterad toward outer third of metacoxa, slightly abbreviated apically, outer lateral metaventral stria absent, metaventral disk impunctate at middle; abdominal ventrite 1 with single, complete lateral stria, middle portion of disk lacking coarse punctures; protibia 4-5 dentate, the basal one or two denticles weak, outer margin serrulate between teeth; mesotibia with two weak marginal spines; outer metatibial margin smooth; propygidium without transverse basal stria, discal punctures moderately large, ocellate, separated by about half their diameters basally and laterally, sparser medioapically; propygidial gland openings evident about one-third from anterior margin, about one-fourth from each lateral margin; pygidium with ground punctation very fine but rather dense in apical half, secondary punctation evident mainly along basal margin. Male genitalia indistinguishable in shape from those of Baconia venusta (see Figs 12 E–H, K–L), although somewhat larger in absolute size.

Remarks.

Baconia navarretei is a relatively large species, completely lacking mesometaventral and basal propygidial striae. Although rather superficial, the most consistently distinguishing character of this species is the fact that the 5th elytral stria is shorter than either the 4th or the sutural, all of them being largely restricted to the posterior half of the elytron. In addition the lateral pronotal punctures tend to be very dense near the margin (Fig. 14D), moreso than in most similar species. Due to variation in pygidial sculpturing, and the large gap between localities for available material we restrict the type series to those specimens from Arizona, USA.

Etymology.

We name this species for Dr. Jose Luis Navarrete Heredia, of the University of Guadalajara, collector of several specimens of this species, in recognition of his valuable contributions to the knowledge of beetles of western Mexico, and recognizing his considerable contributions to many of our studies.