Baconia lewisi Mazur, 1984

Caterino, Michael S. & Tishechkin, Alexey K., 2013, A systematic revision of Baconia Lewis (Coleoptera, Histeridae, Exosternini), ZooKeys 343, pp. 1-297 : 88-90

Baconia lewisi Mazur, 1984 Figs 22 C–D 23Map 6

Epierus festivus Lewis, 1898: 171; Phelister festivus : Lewis 1900: 226; Baconia festiva (Lewis, 1898: 171) Mazur 1984: 280; not Baconia festiva Lewis 1891: 389.

Baconia lewisi : Mazur, 1984: 280, replacement name.

Type locality.

BRAZIL: Pará: Santarém [2.44°S, 54.70°W].

Type material.

Lectotype, sex undetermined, here designated (BMNH): “Santarem” / "H.H. Smith 1898" / "Phelister (Epierus) festivus Lewis Type" / "G.Lewis Coll. B.M.1926-369" / " LECTOTYPE Phelister festivus Lewis 1898, M.S.Caterino & A.K.Tishechkin des. 2010". This species was described from an unspecified number of specimens, and the lectotype designation fixes primary type status on the only known original specimen.

Other material.

BRAZIL: 1: Pará: Jacareacanga, xii.1968, M. Alvarenga (UFPR). FRENCH GUIANA: 1:Montagne des Chevaux, 4°43'N, 52°24'W, 1.viii.2009, FIT, SEAG (CHND), 1:19.ix.2009, FIT, SEAG (MSCC), 1:22.xii.2009, FIT, SEAG (CHND), 1:9.v.2009, FIT, SEAG (FMNH), 1: 31.v.2009, FIT, SEAG (AKTC).

Diagnostic description.

Length: 2.5-2.6mm, width: 2.0-2.1mm; body elongate oval, sides subparallel, only weakly depressed, glabrous; dorsum rich metallic blue, pronotum rarely subtly more greenish, venter piceous; frons weakly elevated over antennal bases, depressed at middle, ground punctation rather coarse, with numerous larger punctures on epistoma, at middle of frontal disk and toward vertex, frontal stria complete, fine across front, subangulate at middle, supraorbital stria absent; antennal scape short, club asymmetrically oblong; epistoma weakly emarginate apically; labrum about 3 ×wider than long, distinctly bisinuate along apical margin, projecting at middle; both mandibles with acute basal tooth; pronotal sides weakly arcuate to apex, marginal stria complete along lateral and anterior margins, slightly crenulate, removed from margin behind head, lateral submarginal stria absent, pronotal disk not impressed in anterior corners, ground punctation of disk rather conspicuous throughout, with quite small secondary punctures increasing in size and density toward sides; elytra with two complete epipleural striae, outer subhumeral stria absent, inner subhumeral stria may be complete, but usually interrupted in middle and slightly abbreviated at apex, dorsal striae 1-4 complete, 5th stria slightly abbreviated from base, sutural stria complete or slightly abbreviated basally, elytral disk with coarse punctures in apical fourth; prosternum rather narrow, flat at base, more convex anterad, keel very weakly emarginate at base, carinal striae slightly shortened anteriorly, may end freely or unite in anterior arch, usually free basally; prosternal lobe about one-half keel length, apical margin subtruncate, marginal stria obsolete at sides; mesoventrite very weakly produced at middle, with complete marginal and submarginal striae; mesometaventral stria arched forward at middle, crenulate, and with secondary mesometaventral stria behind it, interrupted at middle; inner lateral metaventral stria extending from end of secondary mesometaventral stria obliquely posterolaterad toward middle of metacoxa, slightly abbreviated apically, outer lateral metaventral stria parallel to inner stria for most or all of its length; metaventral disk with ground punctation distinct, but lacking secondary punctures; abdominal ventrite 1 with complete inner lateral stria and posterior fragments of outer stria, middle portion of disk with very small but distinct punctures decreasing in density anteromediad; protibia rather narrow, elongate, with 3 well developed marginal teeth, outer margin serrulate between teeth; meso- and metatibiae each with distinct marginal spine and few weak basal submarginal denticles; propygidium with complete transverse basal stria, discal punctures rather small, separated by about their diameters throughout; propygidial gland openings evident behind ends of transverse stria, about one-sixth from each lateral margin; pygidium with ground punctation dense throughout, with only slightly larger secondary punctures interspersed in basal half. Male genitalia (Fig. 23): T8 slightly shorter than broad, sides weakly widened in basal one-fourth, convergent to apex, basal emargination shallow, weakly acute at middle, apical emargination deep, elongate, with ventrolateral apodemes separated by about two-thirds maximum T8 width, extending about one-half distad beneath, obsolete in apical half; S8 divided, inner margins approximate at base, strongly divergent in apical three-fourths, bearing conspicuous fringe of setae in apical one-half, outer margins subparallel to weakly divergent, apical guides well developed in apical half, broadly rounded; T9 with basal apodemes thin, about one-half total length, T9 apices narrowly rounded, glabrous, ventrolateral apodemes weakly projecting beneath; S9 weakly widened at base, head broad, subangulate to apicolateral points, desclerotized along midline, with narrow apicomedial division; tegmen with sides subparallel in basal two-thirds, weakly narrowed to apex, dorsobasal edge weakly arcuate, tegmen in lateral aspect more or less straight in basal three-fourths, abruptly curved ventrad at apex; median lobe about one-fourth tegmen length; basal piece about one-fifth tegmen length.

Remarks.

The elongate, strongly convex body shape (Fig. 22C), and unique arrangment of extra meso- and metaventral striae (Fig. 22D) immediately identify this distinctive species.