Parygrus quechua 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 : 119-122

Parygrus quechua Barr and Shepard , new species

(Figs 2, 18, 19)

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Type material. Holotype male. BOLIVIA. “ BOLIVIA, Sta.Cruz / 5kmSSE. BuenaVista, / HotelFlora&Fauna, / W 63°39.13′ S 17°29.92′ // UV& Hg vapor lights / 440m. Feb.6, 2007 / C.W.& L.B.O’Brien // HOLOTYPE / Pa- rygrus quechua / Barr & Shepard [red label, handwritten] // EMEC49558” ( EMEC) . Paratypes (9 M). BOLIVIA. BOLIVIA: Santa Cruz / Buena Vista vic. / Flora & Fauna Hotel / 23-25/X/00, R.Morris (1 M, EMEC) ; 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 M, 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 (3 M; FSCA) . ECUADOR. 0°40′36′′S 76°24′2′′W / ECUADOR: Napo, Yasuni Scientific / Station ; 13.IV.1998; Coll: K.Will / 210m; Headlamping (in wet area; Will, in litt.) (1M, EMEC) ; ECUADOR: Napo Prov. / Yasuni Research / Station , 250m / 76°36′W, 0°38′S // 17-31.X.1998 / B.K.Dozier / Collector (1 M, FSCA) . PERU. PERU: Madre de Dios / Tambopata Wldlf Res / 30 km SW Pto Moldonado [Maldonado] / 12°50′ S 69°20′ W 290m / 1-14 March 1983 / Joseph J. Anderson (2 M, EMEC) . All paratypes also have the following final label: PARATYPE / Parygrus quechua / Barr & Shepard [yellow label, printed].

Additional specimens examined (6 F). BOLIVIA. 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 Col-

lection of / Arthropods (4 F, FSCA). ECUADOR. ECUADOR: Prov. Napo / ca 10 air km E / Coca, on Rio Napo / 240 m III-8/9-86 / S. McKamey collr. (1 F, EMEC); 0°40′36′′S 76°24′2′′W / ECUADOR: Napo, Yasuni Scientific / Station ; 13.IV.1998; Coll: K.Will / 210m; Headlamping (in wet area; Will, in litt.) (1F, EMEC) .

Diagnosis. The male genitalia of Parygrus quechua n. sp. are distinctive (Fig. 19); none of the other species (for which the genitalia are known) have parameres with inner teeth at midlength and a phallobase subequal in length to the parameres. Parygrus guarani also has parameres with inner teeth at midlength, but the parameres are less than half as long as the phallobase (Fig. 15). Each of the six females were assigned to this species due to their association with males or on the basis of body size and general morphology, but are not designated as paratypes.

Description. Holotype male. Cuticle dark brown, legs, antennae and mouthparts lighter; elongate, moderately flattened; length 5.80 mm (pronotum + elytra), width 2.20 mm; body covered with erect and semi-erect, long, golden setae and much shorter, recumbent setae ( Fig. 18 ).

Head dark brown; punctuation moderately fine, dense, punctures separated by about 1x puncture diameter; setae moderately long; vertex with shallow median depression; frons slightly protruding forward between antennal bases, anterior margin arcuate, distance between antennal bases less than length of antennomere 1. Antenna with antennomeres 1 and 2 red-brown, setose, antennomeres 3–11 yellow, densely setose; antennomere 1 and 2 lengths subequal 2; antennomere 2 covering antennomeres 3–5. Clypeus densely setose, coarsely punctate, broadly emarginate. Maxillary palpus with terminal palpomere elongate, subcylindrical, weakly curved and flattened. Labrum emarginate, densely setose, border fringed with long setae. Labial palpus with terminal palpomere subrectangular, slightly flattened; length about 1/2 that of terminal maxillary palpomere.

Pronotum dark brown; weakly convex, disc weakly flattened at center; length 1.25 mm, width 1.70 mm, widest at basal 1/3. Anterior margin straight except at strongly acute, depressed, anterolateral angles; lateral margins weakly arcuate, slightly sinuate at posterolateral angles, narrowly margined, fringed with erect setae; posterolateral angles acute, produced, explanate; posterior border trisinuate. Disc punctuation moderately fine, similar to that on head, punctures separated by about 1x puncture diameter; setae moderately long. Scutellum : dark brown; subcircular, slightly wider than long, anterior margin strongly arcuate between two anterolateral notches disc flat; punctation very fine.

Elytron dark brown; length 4.55 mm, width 1.10 mm; moderately flattened; nearly parallel-sided, narrowest at basal 1/3, widest at apical 1/3. Humeral angle rounded; lateral margin widened and shallowly sulcate at basal 1/3, entire length narrowly margined; apex acute. Disc strongly punctate and striate with deep, closely spaced punctures distinct from near base to apex, intervals weakly convex; setation similar to that of pronotum except for angulation, uniformly distributed. Hind wing: macropterous.

Legs. Profemur dark brown, covered with fine, evenly spaced punctures and long, recumbent golden setae; protibia red-brown, mostly bare and shiny, dorsal surface with sparse, very long setae, ventral surface of apical 1/3 with dense row of short, stiff setae; apical 1/3 strongly deflexed and swollen, ventral apex with granulate carina and narrow spines; protarsus red-brown, shiny, dorsal surface with sparse, very long setae, ventral surface with row of short, erect setae, protarsomeres 4 and 5 each with a few much-longer dorsal setae. Mesofemur similar to profemur; mesotibia red-brown, weakly arcuate with spines at ventral apex; mesotarsus similar to protarsus. Metafemur, and metatarsus similar to those of mesoleg, metatibia straight with spines at ventral apex.

Venter dark brown; heavily setose; finely to coarsely punctate. Prosternum with anterior border narrowly margined; prosternal process wide between procoxae, convex over procoxae, lateral margins weakly arcuate, narrowly margined; process with very low, rounded, median longitudinal carina terminating in a low, elongate protuberance near apex. Metaventrite with intercoxal process margined and 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 weakly depressed, narrowly margined laterally; ventrites 2–4 of equal length, finely and evenly punctate 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 moderately elongate (Fig. 19). Phallobase same length as parameres and same width as paramere bases together. Parameres each blade-like, inner surface concave; in dorsal view each with an inward-facing tooth at midlength; in lateral view each paramere wide, ventral surface broadly arcuate, dorsal surface weakly sinuate, paramere tip broadly rounded. Penis nearly as long as parameres; bottle-shaped, bulbous at basal 1/2, narrowest just apical to teeth, subparallel to rounded apex.

Intraspecific variation. Males ranged from 5.20–6.00 mm long (n=10); females, 5.50–5.95 mm long (n=6).

Body color is quite variable among the examined specimens, ranging from dark brown to light red-brown. The holotype and others are mostly dark brown, whereas many are uniformly medium brown or red-brown, and some have the pronotum darker than the elytra. The lighter-colored individuals are likely teneral, having been collected at lights. Such a specimen is shown in Fig. 18 . The eight Bolivian and Peruvian males have protibiae each with the apical 1/3 deflexed, swollen at the apex ( Fig. 18 ), and with a ventral granulate carina; the two Ecuadorian males have the protibiae strongly arcuate rather than deflexed. The protibiae of females are arcuate and without ventral carinae. There is also variability in the shape of the pronotal posterolateral angle (produced or not) and the degree of prosternal process sculpturing.

Distribution. Bolivia, Ecuador and Peru (Fig. 2).

Etymology. This new species is named in honor of the speakers of the indigenous Quechua languages, the Quechua people, who inhabit the Andean countries of South America where this species occurs.

Figures

FIGURE 18. Parygrus quechua n. sp., male; 5.30 mm long, 2.05 mm wide: A) dorsal habitus; B) lateral habitus. FIGURE 19. Parygrus quechua n. sp., male genitalia: a) dorsal view; b) lateral view; c) ventral view.