Phelister umens, 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

43. Phelister umens sp. nov. Figs 27A, B , 28A-F , Map 15

Type material.

Holotype male: "Brazil: Am[azonas]. Reserva Ducke, 26 km NE, Manaus [-3, -59.94] Barbosa M.G.V." / "Plot B, FIT1, Feb. 1995" / "Caterino/Tishechkin Exosternini Voucher EXO-00386 (NHMUK). Paratypes (6): Brazil: Amazonas, Reserva Ducke, 26 km NE, Manaus (-3, -59.94), February 1995, FIT, Barbosa M.G.V., EXO-00386 (NHMUK, 1ex.); Amazonas, Reserva Ducke, 26 km NE, Manaus (-3, -59.94), December 1995, Leaf litter, Barbosa M.G.V., EXO-03286 (NHMUK, 1ex.); Amazonas, Manaus (-3, -59.94), August 1935, G.V. Vrendenburg, EXO-03287 (NHMUK, 1ex.); Amazonas, Presidente Figueiredo, 2.017°S, 59.717°W, 17.ix.2009, FIT, FWT Leivas (DZUP, 2ex.); Amazonas, Fazenda Esteio [-2.38, -59.88], Rd. ZF3, KM23, 5.VII.1985, human dung bait, Bert Klein (FSCA, 1ex.).

Other material.

Brazil: Amapá, Rio Calçoene lg. do Tigre (2.4, -51.2), 8/6/61-8/8/61, J. & B. Bechyne, EXO-03288 (CHND, 1ex.); Pará, Tucuruí (-3.75, -49.667), September 1984, FIT, EXO-03289 (CHND, 1ex.); Colombia: Vaupes, Parco Nac. Mosiro-Itajura (Caparu), Centro Ambiental (-1.0667, -69.5167), 60 m, 1/20/03-1/30/03, FIT, D. Arias & M. Sharkey (AKTC, 1ex.); Ecuador: Orellana, Est. Biodiv. Tiputini (-0.64, -76.15), 7/30/08, FIT, A.K.Tishechkin (AKTC, 1ex.); Orellana, Est. Cientifica Yasuní (-0.675, -76.4), 7/17/08-7/19/08, FIT, A. Tishechkin (AKTC, 1ex.); Orellana, Est. Cientifica Yasuní, Rio Tiputini (-0.675, -76.4), 7/26/99-8/4/99, FIT, A. Tishechkin, LSAM 0045448 (LSAM, 1ex.); French Guiana: Acarouany (5.6, -53.8), 11/6/75, Piège + excr. humain, EXO-03293 (CHND, 1ex.); Acarouany, Rte. de St. Laurent (5.6, -53.8), 12/27/75, EXO-03294 (CHND, 1ex.); Crique Anguille (4.83, -52.5), 11/1/79, Excr. humain, EXO-03296 (CHND, 1ex.); Mont Tabulaire Itoupé (3.0303, -53.1067), 400 m, 3/17/10, FIT, SEAG, EXO-03297 (CHND, 1ex.); piste Acarouany - St. Laurent du Maroni (5.55, -53.9333), 12/27/75, Piège + cad. oiseau (CHND, 2ex.); Route Nac. 2, P.K. 47 (4.6333, -52.3667), 7/11/78, Piège + cad. de serpent, EXO-03295 (CHND, 1ex.); Peru: Junín, ~ 16 km NW Satipo, Rio Venado (-11.1989, -74.7705), 1150 m, 3/08/10-3/14/10, A.V. Petrov (AKTC, 1ex.); Junín, ~ 15 km NW Satipo, Rio Venado at 11°11'40"S, 74°46'8"W, 1195 m, window trap, 27.i.2019, A. V. Petrov (AKTC, 1ex.); Junín, ~ 15 km NW Satipo, nr. Rio Venado at 11°11.1-8'S, 74°46.0-2'W, 1100-1400 m, 4/20/19-5/18/19, A. V. Sokolov (AVSC, 1ex.); Cusco, La Convencion, Echarate, CN Timpia (-12.0621, -72.8516), 454 m, 22.x.2009, M.Alvarado, E. Rázuri (MUSM, 1ex.). Suriname: Pará, nr. Overbridge River Resort (5.53, -55.0583), 2/10/10-2/18/10, FIT, P. Skelley, C. Gillett (FSCA, 3ex.); Pará, nr. Overbridge at 5.5195, -55.0695, 2/10/10-2/14/10, FIT, W.B. Warner (AKTC & WBWC, 11ex.); Brokopondo, Ston Eiland Eco Resort nr. Brownsberg (4.9833, -55.1333), 2/10/10-2/13/10, FIT, C. Gillet, P. Skelley, W. Warner, EXO-03334 (FSCA, 1ex.); Sipaliwini, CI-RAP Surv. Camp 1: on Kutari River (-2.1753, -56.7874), 228 m, 8/19/10-8/24/10, FIT, T. Larsen & A.E.Z. Short (SEMC, 1ex.); Sipaliwini, CI-RAP Surv. Camp 1: upper Palumeu River (2.4770°N, 55.6294°W), 275 m, FIT, 3/10/12-3/16/12, A.E.Z. Short (AKTC & SEMC, 6ex.); Sipaliwini, CI-RAP Surv. Camp 4: on lower Kasikasima River (2.9773, -55.3850), 200 m, 3/20/12-3/25/12, FIT, T. Larsen (SEMC, 1ex.).

Diagnostic description.

Length: 1.58-1.77 mm (avg. 1.69 mm); width: 1.34-1.54 mm (avg. 1.47 mm). Body elongate oval, weakly depressed, rufescent, with fairly conspicuous ground punctation; frons weakly depressed in middle, supraorbital stria abbreviated at sides, frontal stria complete, sinuate through depression; epistoma depressed at middle, sides raised; labrum emarginate at apex, each mandible with very small basal tooth; prescutellar impression oval, ~ 1.5 × as wide as scutellum; pronotal disk with few to ~ 20 larger secondary punctures near sides; marginal pronotal stria complete along sides and front; lateral submarginal stria usually abbreviated from base, obsolete in basal 1/4, continuing around anterior angle, ending freely near anterior marginal stria; median pronotal gland openings annulate, ~ 2/3 behind anterior pronotal margin; elytron with single, complete epipleural stria; outer and inner subhumeral striae absent; dorsal stria one abbreviated apically, present in basal 1/2 to 2/3, stria two nearly complete, may be abbreviated from apex, stria three present in apical 1/3 and represented by very fine scratch-like stria in basal 1/3, striae four and five both present in apical 1/3, sutural stria in apical 1/2 to 2/3; propygidium with dense secondary punctures, sparser posterad; pygidial secondary punctures much smaller and sparser, finer toward apex; prosternal keel emarginate at base, striae weakly impressed, may be interrupted by conspicuous gland openings between coxae, free anteriorly; prosternal keel-lobe junction narrowed, lobe rounded, with complete marginal stria; mesoventrite wide and short, produced anteriorly at middle, with fine marginal stria continued at side by short postmesocoxal stria which ends behind mesocoxa; meso-metaventral stria angulate at middle, reaching middle of mesoventrite; lateral metaventral stria short, diverging, ending freely behind mesocoxa; metaventrite impunctate; 1st abdominal ventrite with lateral stria interrupted at gland opening mesad posterior corner of metacoxa; protibia with outer margin sinuate, ‘scalloped’, with marginal spines tiny, inconspicuous, set within close-spaced marginal incisions; mesotibia with outer edge rounded, with rather robust marginal spines; metatibia more slender, with finer marginal spines. Male: S8 with dense, long setal fringe; aedeagus with basal piece ~ 1/3 length of tegmen; tegmen with sides unevenly subparallel in basal 2/3, evenly narrowed to subacute apices, largely straight in lateral view; medioventral process absent; median lobe ~ 3/4 tegmen length, basal apodemes abruptly narrowed.

Etymology.

This species name, umens, means wet or humid, referring to this species’ Amazonian rainforest habitat.

Distribution.

Records of this species extend from Amazonian Ecuador east along the Amazon River to Pará, Brazil, as well as to the northeast in Suriname and French Guiana.

Remarks.

The members of this small species group are all quite similar, having more or less ‘scalloped’ protibiae, weak to obsolete prosternal keel striae, the 1st elytral stria tending to be obsolete posteriorly, and the lateral pronotal margin somewhat compressed, or bent down outside the submarginal stria. Among these, P. umens is distinguished in external characters by having the lateral submarginal pronotal stria slightly abbreviated posteriorly (in others it may be either more complete, or substantially abbreviated), having the subhumeral striae absent, and in having quite dense propygidial punctation.

Figures

Map 15. Collecting records for Phelister congruens (white circles), P. praesignis (square), P. umens (stars), and P. almeidae (black circles).

Figure 27. A, B Phelister umens: A dorsal habitus B ventral habitus C, D P. almeidae: C dorsal habitus D ventral habitus E, F P. chicomendesi: E dorsal habitus F ventral habitus.

Figure 28. Male genitalia A-F Phelister umens: A tergite 8 B sternite 8 C tergites 9 & 10 D sternite 9 E aedeagus, dorsal F aedeagus, lateral G, H P. almeidae: G aedeagus, dorsal H tegmen, lateral I, J P. chicomendesi: I aedeagus, dorsal J tegmen, lateral.