Trichoreninus neo Tishechkin & Mercado

Tishechkin, Alexey K. & Cárdenas, Alida Mercado, 2012, Description of three new species of Nymphistrini (Coleoptera: Histeridae: Haeteriinae) from Central America, Zootaxa 3500, pp. 36-48 : 41-44

Trichoreninus neo Tishechkin & Mercado sp. n.

( Figs. 3 & 4 )

Material Examined. Holotype male: " COSTA RICA: Heredia: La Selva Biol. Res. Stn.; 3 km S Puerto Viejo 80 m 10°26'N 84°1'W 2–5-VI-2001 S. Chatzimanolis ex. flight intercept trap CR1C01 0 11 / SM0747423 KUNHM- ENT [bar code label] / HOLOTYPE Trichoreninus neo sp. n. A. K. Tishechkin & A. Mercado C. des. 2012" ( SEMC). Paratypes (5): COSTA RICA: Puntarenas Province: Península de Osa, Rancho Quemado, collected on October 11–28, 1993, leg. A. H. Gutiérrez (1 female: INBIO); Limon Province: Sector Cerro Cocori, Finca de E. Rojas, collected between May 28 and June 17, 1992, leg. E. Rojas (1 female: INBIO). PANAMA: Colón Province: Achiote, P.N. San Lorenzo, 9°12'N 79°59'W, flight intercept trap on June 11–25, 2007, leg. A. Mercado (1 male: FMUP); San Lorenzo Forest, STRI crane site, 9°17'N 79°58'W, flight intercept trap, May 21–24, 2004 by A. K. Tishechkin (1 male: FMUP); Darién Province: Cana Biological Station, 550 m, 79°45'18’’N 77°41'6’’W, flight intercept trap, on June 7–9, 1996, leg. J. Ashe & R. Brooks (1 female: SEMC)

Description: L: 2.28–2.35 mm; W: 1.87–1.91 mm; E/Pn L: 2.11–2.14; E/Pn W: 1.16–1.17; Pn W/L: 2.06–2.09; E L/W: 0.86–0.89; Pr/Py: 0.81–0.83; Sterna: 0.72–.75, 0.20–0.22, 0.53–0.55; Tibiae: 0.64–.066, 0.73–0.76, 0.89–093 (n=6). Body oval in shape, convex dorsally, dark rufescent brown, surface with fine background punctuation throughout, without setae. Frons longer than wide, trapezoid, wider at posterior base, with prominent latero-marginal frontal carina and interrupted frontal stria; vertex with several large, deep, oval punctures arranged into two irregular, transverse rows. Labrum short, with row of small circular punctures along anterior margin, each bearing short seta, anterior margin of labrum projecting forward at the middle, convex on sides; mandibles long, robust, with curved long tips and a wide tooth on inner edge of each. Antenna with scape longer than wide, pyramidal, bearing a row of deep setose punctures along the edges; antennal funicle collectively shorter than scape; antennal clubs oval, with dense pubescence except for sclerotized areas in dorsal basal, outer lateral and outer ventral surfaces.

Pronotum with posterior margin evenly arcuate, with a row of small shallow punctures along it; lateral margins almost straight, converging anteriorly towards prominent triangular anterior corners, anterior margin deeply emarginate behind the head; pronotal dics evenly convex, with irregularly spaced, large, deep, circular and oval punctures; marginal stria complete, thin and inconspicuous, outer lateral pronotal stria present, widely interrupted along anterior margin, occasionally also briefly interrupted around anterior corners, anterior portions are much more pronounced deeper and wider, than thin lateral portions; antennal cavities not visible in dorsal view. Prosternum with prosternal lobe sparsely punctate, long and wide, stria separating it from of the rest of prosternum irregularly punctate, indistinct; prosternal lobe with complete thin marginal stria (occasionally briefly interrupted medially), deep, large preapical foveae and deep lateral notches; prosternal keel rather narrow, flat, with scattered punctures, carinal striae convergent and united anteriorly, area between striae concave; lateral prosternal striae carinate, diverging anteriorly; posterior margin triangularly emarginate.

Scutellum minute, triangural; elytra convex, widest around midpoint, lateral sides almost straight; all elytral striae deep, wide and sulcate, with small anostomosing punctures on bottoms of sulci; both outer and inner subhumeral striae complete, sometimes briefly interrupted around midpoint; 1st–3rd dorsal and sutural striae complete, 4th and 5th striae variably abbreviate between midpoint and margin of anterior third, 4th dorsal being on average longer than 5th.

Mesoventrite with medial triangular projection on anterior margin; marginal stria absent, disc of metaventrite with two narrow, deep, transverse depressions, which may be treated as fragments of extremely deepened transverse discal stria; meso-metaventral suture obsolete; metaventrite with median suture weak and inconspicuous, disc of metaventrite in both sexes mostly flat, with weak and narrow elevation along median suture in posterior third; disc usually with few (0–6) large, deep, elongate punctures, often positioned asymmetrically relative to midline; inner and outer lateral and longitudinal discal striae of metaventrite sulcate, similar to dorsal elytral striae, but impunctate, all but longitudinal discal striae complete, the latter are represented by a short fragments in posterior thirds of metaventrite, next to metacoxae; posterior ends of inner lateral striae straight, not approaching corresponding ends of longitudinal discal striae; recurrent arms of inner lateral striae present, long, widely separated from inner lateral striae; recurrent arms and outer lateral striae run at margins of depressions of lateral discs, where middle and hind legs rest in repose. First visible abdominal ventrite unmodified, flat, with a dense row of large, deep, postobsolete punctures along anterior margin, with paired long postmetacoxal striae laterally, inner ones being wide, sulcate and short, outer – thin and costate, with long recurrent arms.

Femora elongate rectangular, profemora with punctures near anterior margin; meso- and metafemora smooth. Protibiae elongate oval, outer margin with 8–9 weak wide teeth topped with spines, both teeth and spines diminishing in size towards tibial apices and bases; apices rounded, rugose in texture, inner margin with row of setae, ventral surfaces with irregular rugose texture; meso- and metatibiae paddle-shaped, outer margins obtusely angulate at anterior third, smooth, each with a pair of spines at angles and near apices; inner margins with row of setae; tarsomeres 1–4 each bearing pair of ventral setae; pretarsal claws slightly curved.

Propygidium hexagonal, marginal stria present along lateral and posterior margins. Pygidium trapezoid, convex, relatively short; surface with network of very five, transverse and circular strioles in addition to background tiny punctures (which are less pronounced than on propygidium); fine complete marginal stria present; discs in both sexes similar, no modifications present in females.

Male genitalia as illustrated ( Fig. 4 ).

Etymology. This species is dedicated to the Neotropical Environment Option graduate studies program between McGill University and Smithsonian Tropical Research Institute, in which one of the authors (AMC) conducted her doctoral studies. The name is a noun in apposition.

Distribution. Known from several localities in Costa Rica and Panama.

Figures

FIGURE 3. Habitus of Trichoreninus neo. A) dorsal aspect and B) ventral aspect.

FIGURE 4. Male genitalia of Trichoreninus neo. A) eighth sternite-tergite complex, ventrally; B) same, dorsally; C) ninth sternite, laterally; D) aedeagus, laterally; E) same, apex dorsally; F) ninth sternite, dorsally; G) ninth tergite, ventrally; H) ninth tergite, laterally.