Parygrus zamuco Barr and Shepard, 2020

Barr, Cheryl B. & Shepard, William D., 2020, Hiding in plain sight: rediscovery and review of Parygrus Erichson, 1847, with description of five new species from the Neotropics (Coleoptera: Byrrhoidea Dryopidae), Zootaxa 4755 (1), pp. 99-128 : 122-123

Parygrus zamuco Barr and Shepard , new species

(Figs 3, 20, 21)

http://zoobank.org/ DE1B3D0C-5A2F-4175-8750-CE47331D2EEA

Type material. Holotype male. BOLIVIA. “ BOLIVIA: Santa Cruz / El Cairo, 5 km W Buena / Vista , 16-18-X- 2004 / J. E. Eger, UV light // HOLOTYPE / Parygrus zamuco / Barr & Shepard [red label, handwritten]” ( FSCA) . Paratypes (24; 7 M, 17 F). BOLIVIA. BOL. Cochabamba / Carrasco , El Sacta / 220 m., 26/X/02 / Morris / Wappes (1 F, FSCA) ; BOLIVIA: Santa Cruz / El Cairo, 5 km W Buena / Vista, 16-18-X-2004 / J. E. Eger, UV light (1 M, EMEC; 1M, 1 F, FSCA); BOLIVIA: Sta. Cruz, / San Osteben [Opispo Santistevan] Prov. , / Muyurina , 49 km N // Santa Cruz. XI-3-1959 / 1120 ft. R.B.Cumming // Property of Florida / State Collection of / Arthropods (1 F, EMEC; 1M, 4 F, FSCA) ; BOLIVIA: Santa Cruz / 3.7km.SSE. Buena Vista / Hotel Flora & Fauna 430m / 17°29.949′S - 63° 33.152′W / 5-15-XI-2001, M C Thomas / trop.transition forest, BLT (1 F, EMEC) ; BOLIVIA: Santa Cruz / 3.7 km SSE Buena Vista / Hotel flora y fauna // 17°29′S 63°33′W / 23-30-April-2004; / A.R. Cline, MV&blacklight (2 F, CSCA) ; BOLIVIA: Dept. Santa Cruz, / 3.7km SSE Buena Vista / Hotel flora y fauna ~ 400m / 17°29′S 63°39′W; A. Cline // and J. Wappes collrs. / Ex : 23-30 APR-2004 / MV& BL (1 F, CSCA) ; BOLIVIA: Santa Cruz, 3.7 km SSW / Buena Vista, Hotel Flora y Fauna , / 1-12.V.2004, 17°29′S, 63°33′W, / Ex: MV/ Blacklight, Coll. A.R. Cline (1 F, CSCA) ; BOLIVIA: Santa Cruz / Dpt. 4k SSE B. Vista / 22-25 November 2013 / Wappes & Skillman // Hotel Flora & Fauna / El 350-400meters / 17°29′ S 63°49′ W (1 F, FSCA) ; BOLIVIA: Santa Cruz / Dpt. Huaico nr. Potrerillo / 21 November , 2013 / Wappes & Skillman // Elevation 430meters / MV/UV lights / 63°26′ W 17°40′ S (1F, FSCA) ; BOLIVIA: Santa Cruz / Potrerillos del Guendá ; / 40km.NW. Santa Cruz / 17°40.3′S - 063°27.4′W / 22-XI to 12-XII- 2005 / B.K.Dozier (1 F, FSCA) ; BOLIVIA: Santa Cruz Dist. / Potrerillos del Guenda, Preserva / Natural , 17°40′S 63°27′W, 37m / 17-22-OCT-2007, A.R. Cline & J.E. / Wappes collr.; ex: bl/mv (1 F, CSCA) ; BOLIVIA: Santa Cruz / Potrerillo de Guandá / 16-22-XII-2004 / coll. E. Nearns, UV trap // macro. (1M, FSCA) . PARAGUAY. PARA- GUAY: Alto Paraguay / Puerto La Esperanza / 2 XII 2006 / Carlos Aguilar Julio (1M, EMEC) ; Concepción / San Alfredo / Tagatiyá / 24 X 2019 (1 F, EMEC) . VENEZUELA. VENEZUELA: Guarico / Est. Exp. Nicolasito / UCV – Fagro / 8°8′20′′N- 66°24′32′′W // 15-VI-2000, BL Trap / P.Freytag, M.Gaiani / Q.Arias collectors (1 M, EMEC; 1 M, FSCA). // All paratypes also have the following final label: “ PARATYPE / Parygrus zamuco / Barr & Shepard” [yellow label, printed] .

Diagnosis. The male genitalia (Fig. 21), with lateral expansions of the parameres at the apical 1/4, are unique among species for which the genitalia are known. In addition, both males and females of Parygrus zamuco n. sp. have distinguishing external characteristics: none of the other species have a row of extremely long setae on the dorsal mesotibia, nor maxillary palpi as long and robust ( Fig. 20 ).

Description. Holotype male. Cuticle brown, legs, antennae and mouthparts lighter; elongate, subcylindrical; length 5.75 mm (pronotum + elytra), width 2.20 mm; body covered with erect and semi-erect, moderately long, golden setae and much shorter, recumbent setae ( Fig. 20 ).

Head dark brown; punctures shallow, separated by 1–2x puncture diameter; setae moderately long; vertex with shallow median depression; frons protruding slightly forward between antennal bases, anterior margin truncate, distance between antennal bases more than length of antennomere 1. Antenna with antennomeres 1 and 2 light

brown, setose, antennomeres 3–11 yellow, densely setose; antennomere 1 shorter than antennomere 2, antennomere 2 covering antennomeres 3–6. Clypeus moderately setose and punctate, weakly emarginate. Maxillary palpus with terminal palpomere clavate, curved, very long, as long as clypeus. Labrum emarginate, moderately setose, bordered with fringe of long setae. Labial palpus with terminal palpomere vaguely triangular with 1 side straight, 1 side curved, ventral face slightly flattened; length nearly as long as that of terminal maxillary palpomere.

Pronotum dark brown; strongly convex, disc weakly flattened at center; dark brown; length 1.25 mm, width 1.65 mm, widest at basal 1/3; anterior margin straight except at strongly acute, depressed, anterolateral angles; lateral margins arcuate, sinuate at lateral angles, narrowly margined, fringed with erect setae; posterior border trisinuate; posterolateral angles barely acute, depressed. Disc punctuation similar to that of head, punctures separated by about 1x puncture diameter; setae moderately long. Scutellum : red-brown; subcircular; anterior margin strongly arcuate between two anterolateral notches; disc flat; punctation very fine.

Elytron red-brown; length 4.50 mm, width 1.10 mm; broadly convex; narrowest at anterior 1/3, widest at posterior 1/3. Humeral angle rounded; lateral margin widened and sulcate at anterior 1/3, entire length narrowly margined; apex acute. Disc strongly punctate and striate with deep, closely spaced quadrate punctures distinct from near base to apex, intervals weakly convex; setae shorter than on pronotum, semi-erect and recumbent, uniformly distributed. Hind wing: macropterous.

Legs. Profemur red-brown, covered with fine, evenly spaced punctures and long, recumbent golden setae; protibia yellow-brown, mostly bare and shiny, dorsal surface with numerous short and a few very long setae, ventral surface with dense row of short, erect setae, arcuate with narrow spines at ventral apex; protarsus yellow-brown, shiny, dorsal surface with a few sparse, very long setae, ventral surface with row of long setae. Mesofemur similar to profemur; mesotibia yellow-brown, mostly bare and shiny, dorsal surface with row of extremely long, golden setae, other surfaces with scattered, short setae, arcuate with spines at ventral apex; mesotarsus similar to protarsus except ventral setae much longer. Metafemur similar to pro- and mesofemora; metatibia straight (in lateral view) with spines at ventral apex, heavily and evenly setose, setae moderately long to very long; metatarsus similar to mesotarsus.

Venter red-brown, heavily setose. Prosternum with anterior border narrowly margined; prosternal process wide between procoxae, widest at midlength, convex over procoxae, lateral margins weakly arcuate; prosternal process with median longitudinal carina, bordered laterally by sulci, terminating in an elongate protuberance near apex. Metaventrite with intercoxal process margined and barely depressed; posterior disc depressed at junction of sulcate metakatepisternal suture and metathoracic discrimen. Abdomen with some setae longer than on rest of body except legs; ventrite 1 with triangular intercoxal process thinly margined laterally; ventrites 2–4 of equal length, punctures smaller at center of disc, coarser laterally, aligned with faint, transverse strigae; ventrite 5 longest, disc coarsely punctate, covered with long setae prominent at margins.

Genitalia. Aedeagus stout (Fig. 21). Phallobase about 1.5x longer than parameres and wider than paramere bases together. Parameres in dorsal view each laterally sinuate, widest at base, narrowest at midlength, widened at apical 1/4, then narrowed to rounded apex; in lateral view aedeagus strongly curved ventrally, each paramere wide, ventral surface nearly straight, dorsal surface weakly arcuate, paramere tip bluntly rounded. Penis more than 3/4 length of parameres, in dorsal view basal width subequal to paramere at midlength; evenly narrowed from base to broadly rounded apex.

Intraspecific variation. Males, 5.40–6.00 mm long (n=8), are smaller than females, 6.15–7.15 mm long (n=14). In both males and females there is variation between individuals in respect to the degree of prosternal process sculpturing. Extremely long mesotibial setae are present in both sexes, although the setation is reduced in two female specimens. Among males, the degree to which the protibiae are curved varies. Some of the specimens are much paler in color and are likely teneral, probably having been collected at lights.

Geographic distribution. Known from just a few localities in Bolivia, Paraguay and Venezuela (Fig. 3).

Etymology. This new species is named in honor of the Zamuco, also called the Ayoreo, one of the indigenous peoples who live in the northern Gran Chaco region of Bolivia and Paraguay where this species occurs.

Comments. The specimens from Venezuela are quite geographically disjunct from those collected in Bolivia and Paraguay (Fig. 3). Regardless, they are indistinguishable based on the male genitalia and external morphology. Females are readily identifiable as this species and the specimens examined have been designated as paratypes.

Figures

FIGURE 20. Parygrus zamuco n. sp., male; 6.00 mm long, 2.15 mm wide: a) dorsal habitus; b) lateral habitus. FIGURE 21. Parygrus zamuco n. sp., male genitalia: a) dorsal view; b) lateral view; c) ventral view.