Corinthiscus Fairmaire and Germain, 1861

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 : 331-333

Corinthiscus Fairmaire and Germain, 1861

Corinthiscus Fairmaire and Germain 1861 . Winkler 1961; Solervicens 2001, 2002, 2008; Opitz 2010 , 2017. See Corporaal (1950) for historical citations.

Falsopelonium Pic 1950: 2 . Solervicens 2002.

Type Species. Corinthiscus insignicornis Fairmaire and Germain, 1861 . By original designation.

Diagnosis. The greatly lengthened antennal capitulum will distinguish the members of this genus from those of its sister genus, Petorca Opitz , new genus (compare Figs. 1 and 4 ). The absence of denticles on the ungues will distinguish the members of this genus from superficially similar species of Morulaptoma Opitz , new genus.

Apotypic Characteristic. Elytral disc with subbasal umbo ( Fig. 9 ).

Redescription. Size: Length 3.0–7.0 mm; width 1.0– 2.2 mm. Form: Oblong, rectangular, about 3 times longer than broad ( Fig. 24 ). Vestiture: Dorsum profusely vested with pale setae; antennae moderately setose; elytra vested with 1° and 2° setae. Head: Cranium subquadrate, frons about twice width of eye ( Fig. 13), indented with coarse, setiferous punctures; gula large ( Fig. 14), triangular, sutures converging, with 2 poorly developed, setose

gular processes; labrum shallow, broadly incised distally, tormal processes confluent, epipharyngeal plate small; mandible stout, anterior dens acuminate, medial and posterior dens well-developed, penicillus well-developed; maxilla with laterolacinia present, terminal palpomere subdigitiform; labium with ligula deeply incised, ligular lobes narrowed, terminal palpomere subsecuriform; eyes small, coarsely facetted, ocular notch moderate size; antenna ( Fig. 1 ) comprised of 11 antennomeres, capitate, capitulum greatly lengthened. Thorax: Pronotum quadrate ( Fig. 5 ), anterior limit of dorsolateral carina ends at pronotal tubercle, disc convex, lateral tubercles subacuminate; prointercoxal process broad ( Fig. 19 ), not expanded distally, pronotal projections short, not approximating prointercoxal process; elytra sculptured with basal and sub-basal umbo ( Figs. 9 , 17 ), with asetiferous punctures ending at elytral middle, epipleural fold narrow and tapered to elytral apex, elytral anterior margin not carinate; metathoracic wing with wedge cell closed; metendosternite with furcal lamina, furcal anterior plate large, triangular; profemora swollen, anterior margin without spines, tibial spur formula 1-2-1, tarsal pulvillar formula 3-3-2, unguis without basal denticle ( Fig. 18 ). Abdomen: Aedeagus shorter than length of abdomen, distal region of phallobase lobed, phallobasic lobes not fimbriate, tegmen very reduced, submembranous, phallobasic struts not confluent with phallobasic apodeme, phallobasic rod bifid anteriorly, phallic plates very narrow; spicular plates slightly flared, spicular apodemes not fused, intraspicular plate oblong-linear; ovipositor shorter than abdomen, laminae acuminate, laminal rod discernible.

Distribution. This South American genus is present in Chile and Argentina ( Fig. 23 ).

16) Head and thorax.

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

Fig. 19. Corinthiscus insignicornis, prothoracic venter.

Figs. 17–18. Corinthiscus insignicornis. 17) Elytra;

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