Amerianna pesigani
| Amerianna pesigani | |
|---|---|
 | |
| The holotype | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Superorder: | Hygrophila |
| Family: | Planorbidae |
| Genus: | Amerianna |
| Species: | A. pesigani |
| Binomial name | |
| Amerianna pesigani Hubendick, 1954 | |
Amerianna pesigani is a species of freshwater snail in the family Planorbidae. It may be found on at least two islands in the Philippines.
Taxonomy
Amerianna pesigani was first discovered on July 7, 1952 by Bengt Hubendick in the Tibok River near Palo, Leyte in the Philippines.[1] Hubendick later formally described it as a new species in 1954.[1][2]
Two specimens used in Hubendick's original description are housed in the collections of the Swedish Museum of Natural History. These specimens are the holotype (primary specimen) and one paratype (additional specimen).[3]
Description
Like Amerianna buruana, A. pesigani has a reflected ureter, distinguishing it from the S-shaped ureter of Amerianna obesula and Amerianna leopoldi. In the mantle cavity, a short dorsal ridge and thin rectal ridge are present. The shape of the penis also helps to distinguish this species, as it is circular in this species. Additionally, the penial pore is not at the tip of the penis, as it is in the previously mentioned species.[1]
Distribution and ecology
Amerianna pesigani is native to the Philippines, being discovered in the Tibok River in Ortega, which is located on the island of Leyte, 7 km (4.3 mi) west of Palo.[1] Additional specimens were found in fish ponds and rice fields on the island of Luzon in Tanay, Rizal.[4]
A number of individuals from Tanay were examined to determine the prevalence of trematode parasites in the family Echinostomatidae, though none were found.[4]
References
- 1 2 3 4 Bengt, Hubendick (1955). "Phylogeny in the Planorbidae". The Transactions of the Zoological Society of London. 28: 462–463. doi:10.1111/j.1096-3642.1955.tb00004.x. ISSN 0084-5620 – via Wiley Online Library.
- ↑ Vinarski, Maxim (2018). Bieler R, Bouchet P, Gofas S, Marshall B, Rosenberg G, La Perna R, Neubauer TA, Sartori AF, Schneider S, Vos C, ter Poorten JJ, Taylor J, Dijkstra H, Finn J, Bank R, Neubert E, Moretzsohn F, Faber M, Houart R, Picton B, Garcia-Alvarez O (eds.). "Amerianna pesigani". MolluscaBase. World Register of Marine Species. Retrieved 13 July 2026.
- ↑ "Amerianna pesigani Hubendick, 1954". Global Biodiversity Information Facility. Retrieved 2026-07-13.
- 1 2 Velasquez, Carmen C. (1964). "Observations on the Life Cycle of Euparyphium paramurinum sp. n. (Trematoda: Echinostomatidae)". Journal of Parasitology. 50 (1): 106–107. doi:10.2307/3276041. JSTOR 3276041 – via JSTOR.