Petorca denticolla (Spinola), 1849, 2019

Opitz, Weston, 2019, Classification, Natural History, and Evolution of the Subfamily Peloniinae (Coleoptera: Cleroidea: Cleridae). Part XIV. Taxonomy of the South American Genera Corinthiscus Fairmaire and Germain, Morulaptoma Opitz, New Genus, and Petorca Opitz, New Genus, The Coleopterists Bulletin 73 (2), pp. 329-342 : 338-340

Petorca denticolla (Spinola), 1849 , new combination

( Figs. 4, 8, 10 , 20–23 , 27 )

Clerus denticollis Spinola 1849: 407 . Lectotype. Ƌ. Type locality: CHILE (MNHN). Spinola did not specify the number of specimens that were involved in his description. Therefore, I invoke Recommendation 73F of the ICZN and designate a lectotype for this nominal species. Corporaal 1950; Solervicens 2002.

Pelonium denticolle ( Spinola, 1849) . Lesne 1917.

Corinthiscus denticollis ( Spinola, 1849) . Ekis 1975; Solervicens 2002.

Diagnosis. Specimens of this species have a comparatively short antennal capitulum ( Fig. 4 ). This characteristic will separate the members of this species from the superficially similar ones of the genus Corinthiscus .

Redescription. Size: Length 3.8 mm; width 0.8 mm. Form: As in Fig. 27 . Color: Forebody black, hind body and legs brown, elytral disc with white, diffuse posthumeral bullule, obliquely positioned white epipleural bullule, and white line near elytral apex. Head: Funicular antennomeres filiform, capitulum short, antennomere 9 not longer than combined length of funicular antennomeres, antennomeres 9 and 10 short triangular ( Fig. 4 ), antennomere 11 oblong; frons wider than width of eye (FW/EW = 32/12). Thorax: Pronotum oblong (PW/PL = 6/70), lateral margins with well-defined tubercle ( Fig. 8 ), disc coarsely punctate, lower sides of pronotum carinate; elytra with basal umbo, asetiferous punctation ending at middle of elytra (EL/EW = 170/45); anterior margin of protibial not spinose. Abdomen: Pygidium scutiform; phallobasic lobes large and densely fimbriate; spicular apodemes not fused.

19X); 26) Morulaptoma canuta (magnification 19X); 27) Petorca denticolla (magnification 17X).

Variation. Size: Length 3.8–5.0 mm; width 1.0– 1.3 mm. In some specimens, the basal half of the elytra are castaneous. The forebody may be black or red.

Natural History. One specimen was collected on Araucaria at 1,209 m elevation. Another beetle was captured in a Malaise trap set at 300 m. Three additional beetles were captured on bromeliads, two on Puya berteroniana Mez (Bromeliaeceae) and one on Puya chilensis Molina.

Distribution. In addition to the lectotype, I examined 12 specimens from ( Fig. 23 ): CHILE: Region Valparaiso, Quillota Provincia, Palma de Ocoa, Parque Nacional Campanas, 32.9324°S 71.0781°W, 12-20-XI-1997, Malaise, M. Irwin, E. Schlinger; Petorca, Putuendo Cabildo , 22-XI-2001, ex. Puya berteroniana, J. Solervicens ; Region Coquimbo, Choapa, Agua Dulce, 23-I-1986.in dried fruit of Puya chilensis ; idem, 27-X-1989, J. Solervicens; Región Santiago, 31-VIII-1939, G. Kuschel; Santiago, S, Bernardo, I-1949, Gutierrez; El Canelo, 23-XI-1954, L. E. Pe~ na. Solervicens (2002) reported the following Chilean distribution records for this species: Región Coquimbo, Limar´ı, Choapa; Región Valparaiso, Petorca, Quillota, San Antonio ; Zapallar, 27-XI-1950, Ross and Michelbacher; Región Metropolitana, Melipilla, Cordillera; Región Arica and Parinacota, Ossa, Cillan, collection date not noted, L. E. Pe~ na. Specimens are deposited in CASC, EMEC, FSCA, MNHN, WFBM, and WOPC.

Notes. Corporaal (1950) placed this nominal species in synonymy with C. insignicornis . I have ascertained that these two taxa are not conspecific.

Figures

Figs. 1–12. Morphological structures. Male antenna: 1) Corinthiscus insignicornis; 2) Morulaptoma canuta; 3) Morulaptoma nigra; 4) Petorca denticolla. Pronotum 5) C. insignicornis; 6) M. canuta; 7) M. nigra; 8) P. denticolla. Elytron. 9) C. insignicornis; 10) P. denticolla; 11) M. canuta; 12) M. nigra.

Figs. 20–21. Hypothesized phylogenies of Pelonium, Muisca, Cregya, Morulaptoma, Corinthiscus, and Petorca.

Fig. 22. Bootstrap consensus tree of Pelonium, Muisca, Cregya, Morulaptoma, Corinthiscus, and Petorca

Fig. 23. Known geographical distribution of Corinthiscus, Morulaptoma, and Petorca species.

Figs. 24–27. Habitus. 24) Corinthiscus insignicornis (magnification 19X); 25) Morulaptoma nigra (magnification