A revision of the Chilean water penny genus Tychepsephus Waterhouse, 1876 (Coleoptera, Psephenidae, Eubriinae), with description of a second species and two larval morphotypes, and notes on other Chilean Psephenidae

• Published in: ZooKeys Vol. 1164; no. 3; pp. 23 - 61
• Main Authors: Shepard, William D, Barr, Cheryl B
• Format: Journal Article
• Language: English
• Published: Bulgaria Pensoft Publishers 26.05.2023
• Subjects: Americas; Analysis; Beetles; Byrrhoidea; Cenozoic; Dimorphism (Biology); Discovery and exploration; Eubriinae; Geographical distribution; Habitat (Ecology); Identification and classification; Males; New species; Psephenidae; Sexual dimorphism; Systematics; Taxonomic revision; Taxonomy; Zoology; Chile; South America; neotropical; synonym; biology; habitat; life stages; Aquatic beetles; distribution; sexual dimorphism
• ISSN: 1313-2989; 1313-2970
• DOI: 10.3897/zookeys.1164.103184

The Chilean water penny genus Waterhouse, 1876 is revised, with descriptions and photographic illustrations of life stages including two larval morphotypes, the pupa of one morphotype, and adults of two species. The pupa of has not been reported previously. is described, and Ectopria (Chilectopria) grandis Pic, 1947, is proposed as a new synonym of Waterhouse, 1876, which is redescribed. Taxonomic treatment of the adults of both species includes images of the habitus of males and females, morphological variation, and male and female genitalia. Males and females are sexually dimorphic. Information on the habitat of is provided and illustrated with photographs, and the known geographic distribution of the two species is mapped. The occurrence of in Argentina is reported; therefore, the genus no longer can be considered endemic to Chile. The taxonomic status and geographic distribution in South America of other species of Psephenidae, particularly members of the subfamily Eubriinae, is reviewed.