Baconia slipinskii Mazur, 1981

Caterino, Michael S. & Tishechkin, Alexey K., 2013, A systematic revision of Baconia Lewis (Coleoptera, Histeridae, Exosternini), ZooKeys 343, pp. 1-297 : 143-145

Baconia slipinskii Mazur, 1981 Figs 40E41 C–DMap 12

Baconia slipinskii Mazur, 1981: 184.

Type locality.

BRAZIL: Santa Catarina: Nova Teutonia [27.18°S, 52.38°W].

Type material.

Holotype (MNHG): “Brésil: I-78, Santa Catarina, Nova Teutonia, F. Plaumann" / “TYPUS” / "Baconia slipinskii", examined 2012. Paratypes (2): same locality as type, xii.1977 (MNHG).

Other material.

ECUADOR: Napo, Sacha, 7.iii.1983, leg. L. Huggert (MNHG).

Diagnostic description.

Length: 1.5-1.6mm, width: 1.3-1.4mm; body elongate oval, parallel-sided, subdepressed, glabrous; color rufobrunneus, shining; head with frons flat, slightly produced over antennal bases, ground punctation fine, with few, sparse coarser punctures dorsad, frontal stria, if present, only at upper corner of eye, absent across front, supraorbital stria present at middle, may be attached to sides of frontal stria; antennal scape short, club slightly expanded apically; epistoma short, slightly convex along apical margin, faintly emarginate; labrum about 4 ×wider than long, apical margin shallowly emarginate; mandibles short, each with acute basal tooth; pronotum with sides weakly convergent in basal half, more strongly curved to apex, lateral marginal stria descends to ventral edge of pronotum in posterior two-thirds, detached from anterior marginal stria, which diverges slightly from margin behind eye, lateral submarginal stria present in basal two-thirds, pronotal disk weakly depressed in anterolateral corners, ground punctation very fine and sparse, with very small secondary punctures sparsely scattered in lateral thirds; elytra with two epipleural striae, outer subhumeral stria absent, inner subhumeral absent or barely visible near base, dorsal striae 1-2 nearly complete, slightly abbreviated at apex, striae 3-4 present only in basal half, 4th slightly longer than 3rd posteriorly, and arched toward scutellum at base, 5th stria shorter than 4th or sutural, sutural stria present in about middle one-third, elytral disk with very small, very sparse secondary punctures in apical one-third to one-half, extending further anterad toward suture; prosternal keel moderately broad, emarginate at base, with more or less complete carinal striae diverging basally and apically, few punctures between in anterior half; prosternal lobe slightly over half keel length, apical margin bluntly rounded, with marginal stria present only at middle; mesoventrite produced at middle, with marginal stria weak or interrupted medially; mesometaventral stria very weakly arched forward at middle, continuous laterally with inner lateral metaventral stria, which extends obliquely toward middle of metacoxa, outer lateral metaventral stria short, oblique; metaventral disk moderately coarsely punctate at sides, impunctate at middle, but with few small punctures in front of metacoxa; abdominal ventrite 1 with complete inner lateral stria, with a few small secondary punctures in anterior half of middle portion, ventrites 2-5 with fine punctures at sides, those of ventrite 4 dense across middle, the others more sparsely punctate; protibia very weakly tridentate, the middle tooth strongly reduced, margin serrulate between; mesotibia with two marginal spines; outer metatibial margin with very small subbasal denticle; propygidium lacking basal stria, with fine ground punctation and coarser, ocellate punctures uniformly separated by slightly less than their diameters, propygidial gland openings inconspicuous; pygidium with sparse ground punctation becoming slightly denser apically, with small secondary punctures only in basal half. Male genitalia (Figs 41 C–D): T8 rather deeply, arcuately emarginate at base, ventrolateral apodemes with inner apices subparallel, separated by about two-thirds T8 width, projecting beneath to about ventral midpoint, obsolete apically, apical margin shallowly, acutely emarginate; S8 short, with halves narrowly fused, slightly more strongly sclerotized along midline and basal and apical margins, basal emargination broad, sinuate, subacute at middle, basal apodemes tapered, blunt, sides slightly narrowed to apex, apices narrowly rounded, deflexed, inner corner slightly produced, with a few apical setae, apical emargination broad, sinuate, subacute at middle; T9 with short, narrow basal apodemes, separated dorsally, ventrolateral apodemes bluntly produced beneath, apices of T9 narrowly rounded, with single subapical seta on each side; T10 with weak apical emargination; S9 with long, narrow, medially keeled stem, head abruptly widened, sides weakly rounded to apex, apices acute, widely separated, apical emargination broad, sinuate; tegmen with sides subparallel from base to about midpoint, narrowed to apex, apices subacute, tegmen weakly but evenly curved in lateral aspect, with eversible subapical denticles ventrally; median lobe about one-third tegmen length; basal piece about one-fourth tegmen length.

Remarks.

Baconia slipinskii can be recognized by the following combination of characters: a relatively broad, subquadrate body form, the 4th elytral stria extending further posterad than either the 3rd or the 5th (Fig. 40E), relatively fine and sparse secondary punctures on both the frons and pronotum, small punctures on the anterior half of the 1st abdominal ventrite that are separated by about twice their diameters, and a small cluster of very fine metaventral punctures near the metacoxa (similar to Fig. 45C).