Hoplopyga marginesignata ( Gory and Percheron, 1833 )

Shaughney, Jennifer Marie & Ratcliffe, Brett C., 2015, A Monographic Revision of the Genus Hoplopyga Thomson, 1880 (Coleoptera: Scarabaeidae: Cetoniinae: Gymnetini), The Coleopterists Bulletin 69 (4), pp. 579-638 : 611-613

Hoplopyga marginesignata ( Gory and Percheron, 1833)

( Figs. 61–66 )

Gymnetis marginesignata Gory and Percheron 1833: 72 and 366 (original combination).

Holotype male at MNHN, labeled “Type//Ex Musaeo/ Van Lansberge//marginisignata G&P/ Guyana Typus”, examined. Type locality: “ Cayenne .”

Gymnetis fumata Janson 1880: 576 (synonym).

Holotype male at RMNH, labeled “ Sarayaco , Ecuador /C. Buckley//male symbol// Gymnetis fumata Janson , type male symbol.Type//Type// Hoplopyga fumata Jans. // Gymnetis fumata O. Jans. /Type Ecuador// fumata Jans. // Gymnetis fumata Janson ”, examined. Type locality: “Sarayaco, Ecuador.”

Description. Length 18.9–21.1 mm; width across humeri 10.4–12.5 mm. Dorsal surface velutinous or opaque. Color of head, pronotum, and most of elytra buff-colored to olive brown to piceous. Elytra with orangish yellow to straw-colored, yellow scalloping on lateral and posterior margins, scalloped area sometimes reduced. Pygidium straw-colored to buff-colored to olive brown. Head with anterior third of clypeus reddish brown, shiny. Ventral surface opaque, with ground color as on dorsum. Males with reddish brown, shiny, oblique spot on metasternum either side of midline. Females with metasternum reddish brown, shiny at middle. Mesometasternal process reddish brown, shiny at apex only (males), or entirely (females). Males with last sternite reddish brown, shiny on anterior and posterior margins (rarely with reddish brown, shiny areas at middle of other sternites). Females with sternites mostly reddish brown, shiny, with lateral opaque areas colored as on dorsum. Setae tawny on lighter specimens, testaceous on darker specimens. Head: Surface with large, dense, round and n-shaped punctures. Clypeal apex moderately to strongly reflexed (sometimes recurved), weakly emarginate at middle, distinctly angulate either side of emargination. Antennal club slightly longer than antennomeres 2–7 combined. Pronotum: Lateral margins obtusely angulate. Surface with minute to small, moderately dense, n-shaped punctures, punctures becoming larger and denser laterally. Lateral margins without bead. Elytra: Surface of each elytron with 2 distinctly elevated, discal costae, lateral costa on each elytron interrupted and depressed on mediodiscal area. Depressions between costae with n-shaped punctures; punctures large, dense, arranged longitudinally in striae, becoming smaller and extending to base near scutellum, smaller or usually obsolete in apical declivity and behind apical umbone. Lateral margins impunctate or with minute, round punctures arranged in 1–3 striae. Sutural costae each elevated into longitudinal keel on posterior half. Apices at suture strongly spinose. Pygidium: Surface distinctly convex in both sexes, with large, dense, transversely elongate, vermiform punctures, punctures with minute setae. Venter: Metasternum with large, dense, transversely vermiform punctures either side of middle, punctures with long setae. Mesometasternal process, in lateral view, subparallel to horizontal axis of body or at a slight, oblique angle to horizontal axis of body, moderately protuberant beyond mesocoxae; in ventral view ( Fig. 63 ), sides weakly tapering to rounded apex, ventral face with minute, moderately dense punctures, punctures each with a long seta in males. Abdominal sternites on males each with large, dense, elongate, n-shaped punctures on lateral thirds, females with large, dense, m-shaped punctures on opaque, lateral margins of each sternite. Legs: Protibia tridentate in both sexes. Males with 1 distinct apical tooth and subsequent teeth reduced or obsolete. Parameres: Shaft divergent between midpoint and apex ( Figs. 64–65 ). Lateral margins with bulge just before apex. Apices each with distinct, lateral spur.

Distribution. Hoplopyga marginesignata is known from Brazil, Colombia, Ecuador, French Guiana, Peru, and Suriname ( Fig. 66 ).

Locality Records. 353 specimens from AMNH, BCRC, BMNH, CASC, DCCC, DEIC, FMNH, MNHN, QCAZ, SLTC, UNSM, USNM, and ZMHU. Some data from Touroult and Dalens (2010). BRAZIL (19): AMAZONAS (15): Tefé. PARÁ (4): Bragança, Rio Tapajós , Óbidos. COLOMBIA (24): META (3): Villavicencio . PUTUMAYO (11): No data. NO DATA (10). ECUADOR (13): NAPO (4): Atahualpa (24 km E), Jatun Sacha Biological Reserve , Tena. PASTAZA (1): Puyo. SUCUMBÍOS (1): La Selva Biological Station . NO DATA (7). FRENCH GUIANA (270): CAYENNE (45): Kourou (Wayabo), Macouria , Montagne des Chevaux , Montsinéry (D5, km 3.2–13.2), Régina (D6, km 42.5), Rémire- Montjoly, Roura (D6, km 13.2). SAINT-LAURENT- DU-MARONI (163): Nouveau Chantier, Saint Jean du Maroni. NO DATA (62). PERU (20): AMAZONAS (2): Río Santiago . JUNÍN (1): Satipo. LIMA (1): No data. MADRE DE DIOS (1): Puerto Maldonado (30 km SW). PASCO (1): Pozuzo. SAN MARTÍN (4): Juanjuí, Tarapoto. NO DATA (10). SURINAME (6): NO DATA (6). NO DATA (1).

Temporal Distribution. March (1), May (2), July (1), August (16), September (12), October (17), November (3), December (2).

Diagnosis. Hoplopyga marginesignata is distinguished by the yellow scalloping on the elytral lateral margins, the largely monocolored discal area, and its larger size (18.9–21.1 mm). It is similar in appearance to Gymnetis margineguttata ( Gory and Percheron, 1833) , but the outer discal costa on each elytron is depressed between the mediodiscal area and the apical umbone, whereas each elytron of G. margineguttata has two complete discal costae. In addition, H. marginesignata has distinct n-shaped punctures arranged in striae between the elytral costae, and G. margineguttata specimens lack n-shaped punctures on the elytra. The mesometasternal process of H. marginesignata is only moderately protuberant beyond the mesocoxae and is subparallel or at a slightly oblique angle to the horizontal axis of the body in lateral view, while G. margineguttata has a mesometasternal process that is distinctly protuberant and deflexed.

Nomenclature. Schürhoff (1937) synonymized G. fumata with H. marginesignata and noted that Janson’ s description of G. fumata as “allied to G. margineguttata G. P.” was erroneous and should have read “allied to G. marginesignata G. & P.” We support this synonymy, because the male holotype of G. fumata is nearly identical to H. marginesignata specimens. The name G. fumata reflects specimens that have reduced yellow scalloping around the lateral margins of the elytra.

Natural History. Specimens have been captured in banana traps and at elevations up to 1,000 m (label data).

Figures

Figs. 61–66. Hoplopyga marginesignata. 61–62) Habitus; 63) Mesometasternal process, ventral view; 64–65) Parameres; 66) Distribution.