Derallus terraenovae Oliva, 1983

Short, Andrew Edward Z. & Torres, Phillip J., 2006, Review of the Hemiosus Sharp and Derallus Sharp of North America, Central America, and the Caribbean (Coleoptera: Hydrophilidae: Berosini), Zootaxa 1369, pp. 1-17 : 15

Derallus terraenovae Oliva, 1983

( Fig. 7 )

Derallus terraenovae Oliva, 1983: 438 .

Type material examined. Paratype: BRAZIL: Amazonas State, Solimões inferior, Paraná de Terra Novae ( USNM).

Additional material examined (56). PANAMA: Cocle, 5.3 mi. E Anton, grassy pond, 6.vii. 1967, P.J. Spangler leg. (52: AEZS, USNM); Chiriqui, 5 mi. NW Las Lejas, grassy pond, 5.vii. 1967, P.J. Spangler leg. (1: USNM); Toucumen airport, 7.vii. 1967, P.J. Spangler, leg. (3: USNM). Representative material deposited in MALUZ, MIZA, MFPC and NMW.

Diagnosis. Total length: 2.4–2.8 mm. The distinct ground elytral punctation, single to double row of punctures in interstria X, and the extremely low anterior tooth of the mesosternal process serve to distinguish this species. The later character will separate the taxon from D. altus , with which it is most easily confused.

Distribution. Brazil, Panama (new record).

Remarks. Although the only previous records of this species are from Amazonian Brazil, the specimens agree well with the paratype; the identity of several Panamanian specimens was also kindly confirmed by A. Oliva (Buenos Aires).

Figures

FIGURES 6 – 9. Lateral view of left elytron of Derallus. Arrows indicate the tenth elytral interstria. 6: D. altus (LeConte); 7: D. terraenovae Oliva; 8: D. rudis Sharp; 9: D. angustus Sharp. Scale bars 1.0 mm.