Chasmogenus

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Chasmogenus
Chasmogenus.jpg
Dorsal view of Chasmogenus lineatus
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Coleoptera
Family: Hydrophilidae
Subfamily: Acidocerinae
Genus: Chasmogenus
Sharp, 1882
Type species
Chasmogenus fragilis
Sharp, 1882
Diversity
36 species described to 2021
Synonyms
  • DieroxenusSpangler, 1979

Chasmogenus is a Neotropical genus of water scavenger beetles belonging to the family Hydrophilidae. [1]

Contents

Taxonomy

The genus Chasmogenus was described for the first time by David Sharp in 1882 for species from Guatemala and Panama. [2]

Since 1919 the genus Crephelochares (from the Old World) was considered a synonym of Chasmogenus, [3] but thanks to the results of a phylogenetic analysis involving molecular data, [4] both taxa are now considered distinct genera on their own right. [1]

Currently, a total of 36 species is identified and documented, most of them recorded from the Guiana Shield Region.

Description

Small size (2.5–5.0 mm), bearing a clearly visible sutural stria; long maxillary palps; metafemora usually densely covered by hydrofuge pubescence. The external morphology in Chasmogenus is very uniform across species, so that most species can only be identified by the shape of the male genitalia.

By the presence of the sutural stria, in the Neotropical region, Chasmogenus can only be confused with some members of the genus Primocerus . [1]

Habitat

According to Girón and Short: [1]

The vast majority of Chasmogenus are known from forested habitats, including the margins of streams and forest pools. A few species are known from open marsh habitats (e.g., Chasmogenus australis García and Chasmogenus sapucay Fernández). They can be found among the vegetation and submerged leaf litter. They are also attracted to lights, though usually not in large numbers. Only one species [Chasmogenus cremobates (Spangler)] has been collected in seepages.

— Girón and Short, The Acidocerinae (Coleoptera, Hydrophilidae): taxonomy, classification, and catalog of species

Species

  1. Chasmogenus acuminatus Smith and Short, 2020 [5]
  2. Chasmogenus amplius Smith and Short, 2020 [5]
  3. Chasmogenus australis García, 2000 [6]
  4. Chasmogenus bariorum García, 2000 [6]
  5. Chasmogenus barrae Short, 2005 [7]
  6. Chasmogenus berbicensis Smith and Short, 2020 [5]
  7. Chasmogenus brownsbergensis Smith and Short, 2020 [5]
  8. Chasmogenus cajuina Alves, Clarkson and Lima, 2020 [8]
  9. Chasmogenus castaneus Smith and Short, 2020 [5]
  10. Chasmogenus clavijoi Smith and Short, 2020 [5]
  11. Chasmogenus clinatus Glynn and Short, 2021 [9]
  12. Chasmogenus cremnobates (Spangler, 1979) [10]
  13. Chasmogenus cuspifer Smith and Short, 2020 [5]
  14. Chasmogenus flavomarginatus Smith and Short, 2020 [5]
  15. Chasmogenus fluminensis Clarkson and Ferreira-Jr, 2014 [8]
  16. Chasmogenus fragilis Sharp, 1882 [2]
  17. Chasmogenus gato Smith and Short, 2020 [5]
  18. Chasmogenus gironae Glynn and Short, 2021 [9]
  19. Chasmogenus guianensis Smith and Short, 2020 [5]
  20. Chasmogenus ignotus Smith and Short, 2020 [5]
  21. Chasmogenus inpa Glynn and Short, 2021 [9]
  22. Chasmogenus itatiaia Clarkson and Ferreira-Jr, 2014 [8]
  23. Chasmogenus ligulatus Smith and Short, 2020 [5]
  24. Chasmogenus lilianae Clarkson and Ferreira-Jr, 2014 [8]
  25. Chasmogenus lineatus Smith and Short, 2020 [5]
  26. Chasmogenus lorenzo Short, 2005 [7]
  27. Chasmogenus pandus Smith and Short, 2020 [5]
  28. Chasmogenus rufinasus (Knisch, 1924) [11]
  29. Chasmogenus ruidus Short, 2005 [7]
  30. Chasmogenus sapucay Fernández, 1986 [12]
  31. Chasmogenus schmits Smith and Short, 2020 [5]
  32. Chasmogenus schoedli Short, 2005 [7]
  33. Chasmogenus sinnamarensis Smith and Short, 2020 [5]
  34. Chasmogenus tafelbergensis Smith and Short, 2020 [5]
  35. Chasmogenus ubatuba Clarkson and Ferreira-Jr, 2014 [8]
  36. Chasmogenus undulatus Smith and Short, 2020 [5]

Related Research Articles

<i>Tropisternus</i> Genus of beetles

Tropisternus is a genus of hydrophilid beetles with 63 species in five subgenera in North and South America.

<i>Helochares</i> Genus of beetles

Helochares is a genus of water scavenger beetles in the family Hydrophilidae, represented by 161 described species. It is distributed across the Afrotropical, Australasian, Indo-Malayan, Nearctic, and Palearctic realms.

<i>Helobata</i> Genus of beetles

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.

<span class="mw-page-title-main">Acidocerinae</span> Subfamily of beetles

Acidocerinae is a subfamily in the family Hydrophilidae of aquatic beetles, and it contains over 500 species in 23 genera.

<i>Acidocerus</i> Genus of beetles

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.

<i>Crephelochares abnormalis</i> Species of beetle

Crephelochares abnormalis, is a species of water scavenger beetle found in Cambodia, Sri Lanka, Taiwan, Thailand, Vietnam, Ryukyu Islands and Indonesia: Borneo, Java, Sulawesi, Sumatra.

<i>Agraphydrus</i> Genus of beetles

Agraphydrus is a genus of water scavenger beetle in the family Hydrophilidae represented by 205 described species. It is distributed across the Afrotropical, Australasian, and Indomalayan realms.

<i>Crephelochares</i> Genus of beetles

Crephelochares is a genus of water scavenger beetle in the family Hydrophilidae represented by 29 described species. It is distributed across the Afrotropical, Australasian, Indo-Malayan, and Palaearctic realms.

<i>Crucisternum</i> Genus of beetles

Crucisternum is a Neotropical genus of water scavenger beetle in the family Hydrophilidae represented by seven described species known from the Guiana Shield Region.

<i>Ephydrolithus</i> Genus of beetles

Ephydrolithus is a Neotropical genus of water scavenger beetle in the family Hydrophilidae represented by five described species known from Brazil.

<i>Globulosis</i> Genus of beetles

Globulosis is a Neotropical genus of water scavenger beetle in the family Hydrophilidae represented by two described species known from the Guiana Shield Region.

<i>Katasophistes</i> Genus of beetles

Katasophistes is a Neotropical genus of water scavenger beetle in the family Hydrophilidae represented by four described species known from the Guiana Shield Region.

<i>Nanosaphes</i> Genus of beetles

Nanosaphes is a Neotropical genus of water scavenger beetle in the family Hydrophilidae represented by seven described species known from the Guiana Shield Region.

<i>Novochares</i> Genus of beetles

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.

<i>Primocerus</i> Genus of beetles

Primocerus is a Neotropical genus of water scavenger beetle in the family Hydrophilidae represented by nine described species known from the Guiana Shield Region.

<i>Quadriops</i> Genus of beetles

Quadriops is a Neotropical genus of water scavenger beetle in the family Hydrophilidae represented by six described species.

<i>Radicitus</i> Genus of beetles

Radicitus is a Neotropical genus of water scavenger beetle in the family Hydrophilidae represented by three described species known from the Guiana Shield Region.

<i>Sindolus</i> Genus of beetles

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.

<i>Tobochares</i> Genus of beetles

Tobochares is a Neotropical genus of water scavenger beetles in the family Hydrophilidae represented by 24 described species known from the Guiana Shield Region.

<i>Troglochares</i> Genus of beetles

Troglochares is a Neotropical genus of water scavenger beetle in the family Hydrophilidae represented by one described species known from caves in Ecuador.

References

  1. 1 2 3 4 Girón, JC; Short, AEZ (18 June 2021). "The Acidocerinae (Coleoptera, Hydrophilidae): taxonomy, classification, and catalog of species". ZooKeys (1045): 1–236. doi: 10.3897/zookeys.1045.63810 . PMC   8233300 . PMID   34228772.
  2. 1 2 Sharp, D. (1882). Fam. Hydrophilidae. In: Biologia Centrali-Americana Insecta. Coleoptera. Volume 1. Part 2. Vol. 1. pp. 53–80.
  3. ↑ d’Orchymont, A. (1919). "Contribution à l'étude des sous-familles des Sphaeridiinae et des Hydrophilinae (Col. Hydrophilidae)". Annales de la Société entomologique de France. 88 (1–2): 105–168.
  4. ↑ Short, Andrew Edward Z.; Girón, Jennifer C.; Toussaint, Emmanuel F. A. (2021). "Evolution and biogeography of acidocerine water scavenger beetles (Coleoptera: Hydrophilidae) shaped by Gondwanan vicariance and Cenozoic isolation of South America". Systematic Entomology. 46 (2): 380–395. doi:10.1111/syen.12467. ISSN   1365-3113. S2CID   232264478.
  5. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Smith, Rachel R.; Short, Andrew Edward Z. (2020-05-19). "Review of the genus Chasmogenus Sharp, 1882 of northeastern South America with an emphasis on Venezuela, Suriname, and Guyana (Coleoptera, Hydrophilidae, Acidocerinae)". ZooKeys (934): 25–79. doi: 10.3897/zookeys.934.49359 . ISSN   1313-2970. PMC   7250940 . PMID   32508494.
  6. 1 2 García, M. (2000). "Four new species of Chasmogenus Sharp, 1882 (Coleoptera: Hydrophilidae: Hydrophilinae) from Venezuela". Boletín del Centro de Investigaciones Biológicas Universidad del Zulia. 34: 45–58.
  7. 1 2 3 4 Short, A. E. Z. (2005). "A review of the subtribe Acidocerina of Central America with special reference to Costa Rica (Coleoptera: Hydrophilidae)" (PDF). Koleopterologische Rundschau. 75: 191–226.
  8. 1 2 3 4 5 Clarkson, B; Ferreira Jr, N (2014). "Four new species and first nominal record of Chasmogenus Sharp, 1882 (Coleoptera: Hydrophilidae) from Brazil" (PDF). Zootaxa. 3765 (5): 481–494. doi:10.11646/zootaxa.3765.5.6. PMID   24870916. S2CID   46379711. Archived from the original on 2019-03-07.
  9. 1 2 3 Glynn, Rachel D.; Short, Andrew Edward Z. (2021-10-07). "New species and records of Chasmogenus Sharp, 1882 from the southwestern margin of the Guiana Shield (Coleoptera: Hydrophilidae: Acidocerinae)". Zootaxa. 5048 (3): 435–443. doi:10.11646/zootaxa.5048.3.8. ISSN   1175-5334. PMID   34810791. S2CID   242935735.
  10. ↑ Spangler, P. J. (1979). "A new genus of madicolous beetles from Ecuador (Coleoptera: Hydrophilidae: Hydrobiinae)". Proceedings of the Biological Society of Washington. 92: 753–761.
  11. ↑ Knisch, A. (1924). "Neue neotropische Palpicornier. (Col. Hydrophilidae. - Op. 16.)". Wiener Entomologische Zeitung. 41: 114–140.
  12. ↑ Fernández, L. A. (1986). "Consideraciones sobre el género Chasmogenus Sharp y descripción de Chasmogenus sapucay sp. nov. (Coleoptera: Hydrophilidae)". Neotrópica. 32: 189–193.


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