Phelister uniformis, 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

13. Phelister uniformis sp. nov. Figs 9C, D , 10C, D , Map 7

Type material.

Holotype male: " Suriname: Sipaliwini: CI-RAP Surv. Camp 1: on Kutari River, 228 M, 2°10.521'N, 56°47.244'W, 27.viii.2010, flight intercept trap, 19-24.viii.2010, Larsen & Short" / "Caterino/Tishechkin Exosternini Voucher EXO-00579" (SEMC). Paratypes (10): " Guyane Française: Bélvédère de Saül, point de vue. 3°37'22"N, 53°12'34"W. Piège vitre, 7.ii.2011. SEAG leg." (AKTC, MSCC, CHND & MNHN, 8 ex.); same locality, collector and method, but 2.ix.2010 (DZUP & CHND, 2 ex.).

Diagnostic description.

Length: 1.69-2.09 mm (avg. 1.93 mm); width: 1.46-1.81 mm (avg. 1.68 mm). Body ovoid, sides quite rounded, slightly flattened, dark rufescent, with conspicuous ground punctation (and little secondary punctation) on nearly all surfaces; frons and epistoma deeply depressed along midline; supraorbital stria in middle third only; frontal stria complete, very fine in median depression; sides of epistoma subcarinate; labrum short, emarginate apically; each mandible with very small basal tooth; antennal club elongate, with extended setose patch along dorsal surface; prescutellar impression weakly triangular, about as long as, and 1.5 × as wide as scutellum; pronotum without lateral secondary punctures; median pronotal gland openings ~ 3/4 behind anterior margin, distinct, annulate; marginal pronotal stria complete along front and sides, weakly crenulate in front; lateral submarginal stria complete, barely turned inward anteriorly, the marginal bead weakly convex; elytral epipleuron with single, complete marginal stria; outer subhumeral stria present basally and apically, narrowly interrupted at middle, inner subhumeral stria present in apical 1/2 to 2/3; dorsal striae 1-3 complete, stria four present but fragmented along most of its length, with distinct basal arch to suture, stria five very weakly impressed in apical 1/2, sutural stria complete, meeting basal arch; propygidium with few larger secondary punctures sparsely intermingled with dense ground punctation; pygidium with dense ground punctation only; prosternal keel emarginate at base, striae complete, separate at base, converging to middle, close and parallel anteriorly, united in narrow apical arch; keel with distinct, annulate gland openings; prosternal lobe rounded, with complete marginal stria; mesoventrite produced, with complete marginal stria continued at sides by postmesocoxal stria nearly to middle of lateral portion of metaventrite; mesometaventral stria bluntly angulate at middle, reaching middle of mesoventrite, continued by lateral metaventral stria to middle of metacoxa; mesoventrite, anterior and lateral portions of metaventrite, and sides of 1st abdominal ventrite with conspicuous, transversely reticulate microsculputure; 1st abdominal ventrite with single, incomplete lateral stria, also with distinct, annulate gland opening along inner edge of stria; protibia with outer margin distinctly dentate, with five marginal spines; male protarsal setae not expanded; meso- and metatibiae similar, weakly expanded to apex, with few marginal spines mostly confined to apical 1/2. Male: basal piece ~ 1/3 length of tegmen; tegmen with sides widening toward apical 1/4, then narrowed to blunt apices; tegmen rather flat, weakly curved in lateral view; medioventral process present in basal 1/3; median lobe ~ 2/3 tegmen length, basal apodemes abruptly thinner near bases.

Etymology.

This species name refers to its relatively ‘uniform,’ fine, even dorsal punctation.

Distribution.

This species is known only from French Guiana and Suriname.

Remarks.

Among several species with moderately conspicuous ground punctation, P. uniformis is distinctive in lacking larger secondary punctures, having a small, bluntly triangular prescutellar impression, the pronotal glands 2/3 back from anterior margin, the outer subhumeral stria interrupted at middle and the inner present in apical 1/2.

Figures

Map 7. Collecting records for Phelister parana (inverted triangles), P. asperatus (black stars), P. uniformis (white squares), P. miscellus (white hexagons) P. sculpturatus (black circles), P. inbio (white stars) and P. tunki (black upright triangle).

Figure 9. A, B Phelister asperatus: A dorsal habitus B ventral habitus C, D P. uniformis: C dorsal habitus D ventral habitus E, F P. miscellus: E dorsal habitus F ventral habitus G, H P. inbio: G dorsal habitus H ventral habitus.

Figure 10. Male genitalia A, B Phelister asperatus: A aedeagus, dorsal B aedeagus, lateral C, D P. uniformis: C aedeagus, dorsal. D aedeagus, lateral E, F P. miscellus: E aedeagus, dorsal F aedeagus, lateral G P. inbio: Aedeagus, dorsal.