Running-streams
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Ambrysus circumcinctus
creeping water bug
Ambrysus circumcinctus is a species of creeping water bug in the family Naucoridae, distributed across Central America and North America. As a member of the subfamily Cryphocricinae, it inhabits aquatic environments including running streams. The genus Ambrysus is widespread in the New World, with its greatest diversity in Mexico. Like other naucorids, this species has adaptations for clinging to substrates in flowing water.
Ambrysus hungerfordi
A creeping water bug in the family Naucoridae, described by Usinger in 1946. It belongs to the genus Ambrysus, which is widespread in the New World from northern North America to Argentina, with greatest diversity in Mexican running streams. Like other members of Cryphocricinae, it is aquatic in both nymphal and adult stages.