G. it. Ent., 7 (39): 203-217
April 30, 1995
The genus Deltosoma Thomson, 1864 in Argentina:
D. lacordairei Thomson, 1864 and D. xerophila n. sp.;
with a revision of larval tunnels and
pupal chambers in Neotropical Cerambycinae
(Coleoptera: Cerambycidae)
by
OSVALDO R. DI IORIO
Abstract - The species of the genus Deltosoma are mainly tropical, distributed in Central America and the north of South America; their larval biology was hitherto unknown. Deltosoma lacordairei is here recorded for the first time form northeastern Argentina (Paranaense Province of the Amazonian Dominion). Its host plant in Paraguay is Helietta apiculata Bentham (Rutaceae). Deltosoma xerophila n. sp. is distributed in the xerophilous forests of Central Argentina (Chaco Province of the Chaquenian Dominion). Its host plant is Caesalpinia paraguariensis (Parodi) Burkart (Leguminosae). The larval tunnels and pupal chambers of both species of Deltosoma are described, illustrated and compared with others known for Neotropical Cerambycinae (including those of Chrysoprasis aurigena and Paromoeocerus barbicornis); a possible evolutive path is suggested. Definitions used in descriptions of larval architectures for Cerambycinae are unified. Other new definitions and a scheme for further descriptions of larval and adult buildings are also proposed.
