Baconia prasina, 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 : 82-84

Baconia prasina sp. n. Figs 21 A–CMap 6

Type locality.

MEXICO: Veracruz: Motzorongo [18.64°N, 96.73°W].

Type material.

Holotype female: "Motzorongo. 6" / "[handwritten, mostly unreadable] Schmidt!" / "MEXICO coll. J.Flohr" / "Caterino/Tishechkin Exosternini Voucher EXO-00488" (ZMHB).

Diagnostic description.

Length: 2.2mm, width: 1.9mm; body slightly elongate oval, rather strongly convex, glabrous; head, pronotum and elytra dark metallic green, pygidia only faintly metallic, venter rufo-piceous; frons elevated over antennal bases and along sides of frontal stria, slightly depressed behind, ground punctation rather conspicuous, with few secondary punctures on epistoma and within frontal depression, frontal stria present along inner margin of eye, bent mediad, complete, subangulate mediad; epistoma weakly convex along apical margin, truncate; labrum about 3 ×wider than long, transversely subcarinate, weakly bisinuate along apical margin; anten nal scape short; pronotal sides evenly convergent in basal two-thirds, abruptly arcuate to apex, weakly depressed in anterior corners, marginal stria complete along lateral and anterior margins, slightly crenulate in front, lateral submarginal stria absent, ground punctation of pronotal disk conspicuous, increasingly interspersed with small secondary punctures in lateral thirds, punctures forming a more or less continuous submarginal series; elytra with three complete epipleural striae, outer subhumeral stria absent, inner subhumeral stria present in basal fifth and as faint median fragment, dorsal striae 1-3 usually complete, 3rd stria faintly abbreviated apically, 4th stria present in basal half, arched to connect to base of complete sutural stria, 5th stria absent, elytral disk with few coarse punctures in apical sixth; prosternum convex, keel emarginate at base, carinal striae complete, divergent anterad and posterad, separate throughout; proster nal lobe about two-thirds keel length, apical margin bluntly rounded, marginal stria well impressed at middle, obsolete at sides; mesoventrite distinctly produced, marginal stria complete, mesometaventral stria arched forward, narrowly interrupted at middle, continuous at sides with lateral metaventral stria, extending obliquely posterolaterad toward inner third of metacoxa, outer lateral metaventral stria present, parallel to basal half of inner stria, metaventral disk impunctate at middle; abdominal ventrite 1 with single, complete lateral stria, middle portion of disk impunctate; protibia 4 dentate, basal pair of denticles very close together, outer margin serrulate between teeth; mesotibia with one marginal spine; outer metatibial margin smooth; propygidium without basal stria, discal punctures ocellate, very irregularly separated by 1-3 × their diameters, smaller and sparser apically and laterally; propygidial gland openings evident about one-third from anterior and one-fourth from lateral margins; pygidium with ground punctation conspicuous, secondary punctures rather coarse and dense in basal half, smaller and sparser apically. Male: not known.

Remarks.

This is a highly distinctive species, in its relatively convex body form and dull green coloration (Fig. 21A), complete frontal stria (Fig. 21C), and basally connected 4th and sutural elytral striae.

Etymology.

This species’ name refers to its distinctly green coloration.