Phelister marginatus, Caterino & Tishechkin, 2020

Caterino, Michael S. & Tishechkin, Alexey K., 2020, Recognition and revision of the Phelister blairi group (Histeridae, Histerinae, Exosternini), ZooKeys 1001, pp. 1-154 : 1

21. Phelister marginatus sp. nov. Figs 13C, D , 14C, D , Map 8

Type material.

Holotype male: " Costa Rica: Puntarenas, Monte Verde [10.3, -84.8], 1520 m, 4 May 1989, J. Ashe, R. Brooks, R. Leschen, ex. flight intercept trap" / "SEMC0903646 KUNHM-ENT (SEMC). Paratypes (2): Costa Rica: Limon, Valle de la Estrella, R.B. Hitoy Cerere, Camino a S. Toma de Agua (9.67, -83.02), 160 m, 9/30/99-10/9/99, W. Arana, INB0003142728 (INBIO, 1ex.); Puntarenas, Est. Biol. Las Alturas (8.9362, -82.8335), 1660 m, 5/31/04-6/3/04, FIT, J. Ashe, Z. Falin, I. Hinojosa, SM0606778 (SEMC, 1ex.).

Diagnostic description.

Length: 2.64-2.80 mm (avg. 2.71 mm); width: 2.48-2.56 mm (avg. 2.52 mm). Body broadly rounded, depressed, sides explanate, rufescent, with very dense and conspicuous ground punctation throughout; frons rather broad, moderately depressed along midline; supraorbital stria absent; frontal stria interrupted across median depression; epistoma subcarinate along sides; labrum emarginate and subcarinate apically; mandibles each with small basal tooth; antennal club elongate, with small setose patch near apex of dorsal surface; prescutellar impression absent, at most faintly depressed; median pronotal gland openings small, obscured by punctures, but present ~ 2/3 from anterior margin; marginal pronotal stria complete, fine, continued around anterior margin; submarginal pronotal stria present close to marginal as a raised carina, disk deeply depressed along its inner edge; elytron with single, complete epipleural stria; outer subhumeral stria complete beneath strong lateral elytral carina, which may be the complete inner subhumeral stria; dorsal striae faintly impressed, only a few vaguely traceable, primarily the complete sutural stria; propygidium flat, densely covered with elongate punctures, pygidium with flat anterodorsal surface punctate, and short, curved posteroventral surface impunctate but shagreened; prosternal keel narrowed, emarginate at base, striae narrowly separate at base, converging and subparallel to near apex, united anteriorly; prosternal lobe reflexed, with marginal stria complete; mesoventrite produced, its marginal stria only faintly impressed; postmesocoxal stria present, not reaching mesepimeron; mesometaventral stria absent across middle; lateral metaventral stria forming a short stria parallel to postmesocoxal; all ventrites punctate; all tibia slightly broadened; protibia with outer margin strongly dentate, bearing four or five marginal spines; protarsal setae of male not flattened; meso- and metatibiae slightly broadened, with a few spines along outer margins. Male: basal piece 1/3 length of tegmen; tegmen narrow at base, evenly widened, rounded to near apex, apices rounded; tegmen curved to apex in lateral view; medioventral process present, projecting at basal fourth; median lobe ~ 1/3 tegmen length, basal apodemes abruptly narrowed at bases.

Etymology.

The name of this species refers to the carinate margins of the pronotum and elytra.

Distribution.

This species is known only from Costa Rica, from Limón and Puntarenas provinces.

Remarks.

As described above, this species is part of a related lineage comprising the preceding two and the following species. Phelister marginatus is easily distinguished by its broad, flattened, laterally carinate and explanate body, along with its largely effaced elytral striae.

Figures

Map 8. Collecting records for Phelister vazdemelloi (black circles), P. praedatoris (white star), P. ifficus (black squares), P. genieri (hexagon), and P. marginatus (black stars).

Figure 13. A, B Phelister genieri: A dorsal habitus B ventral habitus C, D P. marginatus: C dorsal habitus D ventral habitus E, F P. vazdemelloi: E dorsal habitus F ventral habitus G, H P. dilatatus: G dorsal habitus H ventral habitus.

Figure 14. Male genitalia A, B Phelister genieri: A aedeagus, dorsal B aedeagus, lateral C, D P. marginatus: C aedeagus, dorsal D aedeagus, lateral E, F P. vazdemelloi: E aedeagus, dorsal F aedeagus, lateral G, H P. dilatatus: G aedeagus, dorsal H aedeagus, lateral.