| Primocerus | |
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| Dorsal view of Primocerus neutrum | |
| Scientific classification | |
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| Genus: | Primocerus Girón & Short, 2019 |
| Diversity | |
| 9 species | |
Primocerus is a Neotropical genus of water scavenger beetle in the family Hydrophilidae represented by nine described species known from the Guiana Shield Region. [1]
The genus Primocerus was described for the first time by Girón & Short in 2019. [2]
It belongs in the subfamily Acidocerinae and contains nine described species from Brazil (Pará), Guyana, Suriname, and Venezuela. [1] [2]
Small to medium-sized beetles (2.4–4.9 mm), smooth and shiny dorsally, orange-brown, reddish brown, or dark brown in coloration, with moderately long maxillary palps. The elytral punctation ranges from shallow to strongly marked, forming impressed serial striae; all the species bear a well defined sutural stria. A complete diagnosis was presented by Girón and Short. [1] [2]
According to Girón and Short, "The habitats occupied by members of Primocerus range from forested pools to seepages". [1]
Helobata is a mostly Neotropical genus of water scavenger beetle in the family Hydrophilidae. It contains 13 described species, one of which is broadly distributed, reaching North America.
Acidocerinae is a subfamily in the family Hydrophilidae of aquatic beetles, and it contains over 500 species in 23 genera.
Chasmogenus is a Neotropical genus of water scavenger beetles belonging to the family Hydrophilidae.
Acidocerus aphodioides is a species of water scavenger beetle in the family Hydrophilidae. It is the only species in the genus Acidocerus. It is known only from Mozambique.
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Aulonochares is a Neotropical genus of water scavenger beetle in the family Hydrophilidae represented by three described species known from the Guiana Shield Region.
Batochares is an Afrotropical genus of water scavenger beetle in the family Hydrophilidae represented by three described species.
Colossochares is an Afrotropical genus of water scavenger beetle in the family Hydrophilidae represented by two described species.
Crucisternum is a Neotropical genus of water scavenger beetle in the family Hydrophilidae represented by seven described species known from the Guiana Shield Region.
Ephydrolithus is a Neotropical genus of water scavenger beetle in the family Hydrophilidae represented by five described species known from Brazil.
Globulosis is a Neotropical genus of water scavenger beetle in the family Hydrophilidae represented by two described species known from the Guiana Shield Region.
Helopeltarium is a genus of water scavenger beetle in the family Hydrophilidae represented by only one species. It is known only from Myanmar.
Katasophistes is a Neotropical genus of water scavenger beetle in the family Hydrophilidae represented by four described species known from the Guiana Shield Region.
Nanosaphes is a Neotropical genus of water scavenger beetle in the family Hydrophilidae represented by seven described species known from the Guiana Shield Region.
Novochares is a primarily Neotropical genus of water scavenger beetles in the family Hydrophilidae represented by 15 described species, one of which is thought to be introduced in Florida in the United States of America.
Quadriops is a Neotropical genus of water scavenger beetle in the family Hydrophilidae represented by six described species.
Radicitus is a Neotropical genus of water scavenger beetle in the family Hydrophilidae represented by three described species known from the Guiana Shield Region.
Sindolus is a Neotropical genus of water scavenger beetles in the family Hydrophilidae represented by eight described species, ranging from Mexico to Argentina, and including one species recorded from Antigua in the Lesser Antilles.
Tobochares is a Neotropical genus of water scavenger beetles in the family Hydrophilidae represented by 24 described species known from the Guiana Shield Region.
Troglochares is a Neotropical genus of water scavenger beetle in the family Hydrophilidae represented by one described species known from caves in Ecuador.