Cratera (flatworm)
| Cratera | |
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| Cratera pseudovaginuloides | |
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| Genus: | Cratera Carbayo et al., 2013
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| Type species | |
| Geoplana pseudovaginuloides Riester, 1938
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Cratera is a genus of land planarians from South America.
Description
The genus Cratera is characterized by having a leaf-shaped body. Most species are between 3 and 7 cm long. The hundreds of eyes distributed along the body are monolobulated, i.e., simple and circular. The copulatory apparatus has a permanent conical penis occupying the entire male cavity. The final portion of the ejaculatory duct, the channel that guides sperm through the penis, has an expanded cavity that resembles a volcanic crater. It is very similar to the related genus Obama, the main difference being the presence of trilobulated eyes in the latter.[1]
Etymology
The name Cratera is derived from the Latin word crater and refers to the cavity in the penis that resembles a volcanic crater.
Species
There are nine species assigned to the genus Cratera:
- Cratera anamariae Carbayo & Almeida, 2015
- Cratera crioula (E. M. Froehlich, 1955)
- Cratera cuarassu Carbayo & Almeida, 2015
- Cratera joia (Froehlich, 1956)
- Cratera ochra Rossi, Amaral, Ribeiro, Cauduro, Fick, Valiati & Leal-Zanchet, 2015
- Cratera pseudovaginuloides (Riester, 1938)
- Cratera steffeni Rossi, Fontoura, Amaral & Leal-Zanchet, 2014
- Cratera tamoia (E. M. Froehlich, 1955)
- Cratera yara (E. M. Froehlich, 1955)
References
- ^ Carbayo, F.; Álvarez-Presas, M.; Olivares, C. U. T.; Marques, F. P. L.; Froehlich, E. X. M.; Riutort, M. (2013). "Molecular phylogeny of Geoplaninae (Platyhelminthes) challenges current classification: Proposal of taxonomic actions". Zoologica Scripta. 42 (5): 508. doi:10.1111/zsc.12019.