Taxonomic revision of the genus Caccothryptus SHARP (Coleoptera: Limnichidae)

Abstract

The seven known species of the genus Caccothryptus SHARP (Coleoptera: Limnichidae: Limnichinae) are revised. Lectotypes are designated for C. laosensis (PIC, 1928), C. maculosus (PIC, 1923), C. punctatus PIC, 1923 and C. rouyeri PIC, 1922. Fourteen species are described as new: C. nepalensis sp.n. from Nepal, C. jendeki sp.n. from India, C. fujianensis sp.n. and C. sinensis sp.n. from China, C. auratus sp.n. from Thailand, C. malickyi sp.n. from Vietnam, C. luzonensis sp.n., C. nanus sp.n., C. ticaoensis sp.n. and C. zetteli sp.n. from the Philippines, C. schuhi sp.n. from Java (Indonesia), and C. jaechi sp.n., C. sulawesianus sp.n. and C. wooldridgei sp.n. from Sulawesi (Indonesia). Caccothryptus laosensis (PIC, 1928) is synonymised with C. maculosus (PIC, 1923). Five species groups are suggested based on external and genital characters: (1) C. compactus group, with dimorphic anterior male claws (among other characters); (2) C. rouyeri group, with a longitudinal sulcus in the median lobe of the aedeagus; (3) C. testudo group, with the median lobe of the aedeagus not longitudinally sulcate; (4) C. jaechi group, with a strong denticle in the ventral side of the median lobe of the aedeagus and glandular pores on the 4th and 5th abdominal sternites of males; and (5) C. zetteli group, also with glandular pores on the 4th and 5th abdominal sternites of males but without a strong denticle in the ventral side of the median lobe of the aedeagus. The distribution of the species and the species groups is discussed.