Naucoridae
Guides
Ambrysus buenoi
Ambrysus buenoi is a creeping water bug in the family Naucoridae, distinguished as a member of the Ambrysus pulchellus species complex. It is diagnosed by specific male genital morphology, particularly the structure of the phallosoma and the medial lobes of abdominal tergum VIII. The species occurs in Mexico and the United States.
Ambrysus californicus
California creeping water bug
Ambrysus californicus is a species of creeping water bug in the family Naucoridae. It was described by Montandon in 1897. The species is native to North America and belongs to the subfamily Cryphocricinae, commonly known as saucer bugs due to their round, flat body shape. Like other members of the genus Ambrysus, it is an aquatic insect adapted to life in running streams.
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.
Ambrysus lunatus
creeping water bug
Ambrysus lunatus is a species of creeping water bug in the family Naucoridae. It occurs in Central America and North America. The subspecies A. lunatus lunatus has been described with documented immature stages. Like other members of the genus Ambrysus, it is an aquatic predator inhabiting running streams.
Ambrysus mormon
creeping water bug
Ambrysus mormon is a species of creeping water bug in the family Naucoridae, first described by Montandon in 1909. Three former subspecies (A. m. heidemanni, A. m. minor, and A. m. mormon) were synonymized by Reynoso-Velasco and Sites. The species is distributed in western North America, with records from the western United States and northwestern Mexico.
Ambrysus pulchellus
Ambrysus pulchellus is a creeping water bug in the family Naucoridae, part of the A. pulchellus species complex characterized by distinctive male phallosoma morphology and medial lobes of abdominal tergum VIII. The species exhibits the widest distribution within the subgenus Ambrysus, spanning parts of both the Nearctic and Neotropical biogeographic realms. Recent taxonomic revision has synonymized the subspecies A. pulchellus nitidulus and A. pulchellus pallidulus with the nominate form, and documented new country records from Honduras, Nicaragua, and Panama.
Limnocoris
Limnocoris is a genus of creeping water bugs in the family Naucoridae, comprising over 70 described species distributed primarily in the Neotropics. The genus was established by Stål in 1860 and represents the type genus of the subfamily Limnocorinae. Recent taxonomic revisions have significantly revised species boundaries, describing numerous new species and resolving synonymies across North America, the tropical Andes, and the Amazon/Guiana Shield regions. Species exhibit wing polymorphism and are distinguished by detailed morphological characters of the genitalia and terminalia.
Pelocoris biimpressus shoshone
Pahranagat Naucorid Bug
Pelocoris biimpressus shoshone is a subspecies of creeping water bug in the family Naucoridae, described by La Rivers in 1948. It belongs to the true bug order Hemiptera and is part of the aquatic true bug infraorder Nepomorpha. The subspecies is known from Middle and North America, with records indicating presence in both regions. Very limited observational data exists for this taxon, with only two observations recorded in iNaturalist.
Pelocoris femoratus
creeping water bug, saucer bug
Pelocoris femoratus is a species of creeping water bug in the family Naucoridae. It is found across Central America, North America, and South America. The species inhabits still waters with dense vegetation, where it actively hunts other arthropods. It is active from spring through autumn and can deliver a painful bite if mishandled.