Oncochelyna tuberculata (PIC, 1935) (Figs 16, 42, 71, 92)

Pelonium tuberculata PIC 1935: 101.

Lectotype: ♀. Argentina, Chaco de Santiago de Estero (MNHN). CORPORAAL 1950: 290 (Corinthiscus). SOLERVICENS 1998: 79 (Exochonotus); 2004: 31 (Exochonotus); 2006: 23 (Exochonotus).

Diagnosis: The infuscations on the elytral disc will distinguish these beetles from O. barrigai.

Redescription: Size: Length 3.5 mm; width 1.0 mm. Form: As in Fig. 92. Integument: Castaneous, except elytral disc with infuscations. Head: Cranium coarsely punctate, antennal funicular antennomeres subquadrate (Fig. 16), capitulum lax, antennomeres 9 and 10 triangular, antennomere 11 ovate; eyes small, frons wide (EW/FW 10/25); last maxillary and labial palpomere securiform. Thorax: Pronotum (Fig. 42) with angular tubercle at sides, disc coarsely punctate, without knobs; elytral asetiferous punctures arranged into 10 punctiform striae, punctures binodal, punctures extend to elytral apex, entire length of epipleural margin serrulate. Abdomen: Aedeagus short, distal region of phallobase slightly lobed, tegmen very reduced, submembranous, phallobasic struts confluent with phallobasic apodeme, phallobasic rod long; phallic plates broad, phallic apex small triangular.

Distribution (Fig. 71): In addition to the lectotype, I examined 8 specimens from: Argentina: Provincia la Rioja, Patquia,?- XI-1959, M. Viana; Provincia Santiago del Estero, Rio Salado; Provincia de Catamarca,?-?-1926; Provincia de Catamarca, Catamarca, 28 km SE Tinogasta, 15-X-1997, S. Riog, M. E. Erwin, F. D. Parker; Provincia de La Rioja, Londres, 7-XI-1995, Roig, Flores. Paraguay: Departamento de Cordillera, Altos,?- II-1954. Specimens are deposited in: MNHN, MNNC, SDEI, WFBM, and WOPC.