| Cratera assu | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Platyhelminthes |
| Order: | Tricladida |
| Family: | Geoplanidae |
| Genus: | Cratera |
| Species: | C. assu |
| Binomial name | |
| Cratera assu Araujo, Carbayo, Riutort & Álvarez-Presas, 2020 | |
Cratera assu is a species of land planarian belonging to the subfamily Geoplaninae. [1] It is known from specimens found in Serra da Bocaina National Park in Brazil. [2]
Cratera assu is a flatworm around 50–65 mm in length and 3–3.5 mm in width. The body is elongate and slightly lanceolated, with a rounded front tip, and a pointed back tip. Widest at the pharynx, the body narrows towards the front and back. The dorsal side of the body can vary in color from chestnut brown to black-brown. In the front tenth of the body, there is a submarginal stripe that is yellow-orange or grayish in color; towards the back, this stripe is marginal. The submarginal stripe is inconspicuous in some individuals. Some individuals have a thin grayish midline. The ventral side of the body can range from sand yellow to light ivory in color. [2]
Aside from its coloration and length, it is distinguished from other members of Cratera by having dorsal eyes, a bell-shaped pharynx, a horizontal penis papilla, a widened distal portion of the ejaculatory duct that occupies most of the penis papilla, and the lack of a common glandular ovovitelline duct. [2]
The specific epithet is derived from the Tupi language word assu, "large", in reference to the large size of the ejaculatory duct's distal dilation. [2]
Obama is a genus of land planarians from South America. It contains several species adapted to human-disturbed environments, including the only invasive land planarian native to the Neotropical realm, Obama nungara, which has been accidentally introduced in Europe.
The reproductive system of planarians is broadly similar among different families, although the associated structures can vary in complexity.
Cratera is a genus of land planarians found in South America.
Cratera nigrimarginata is a species of land planarian found in Brazil.
Cratera crioula is a species of land planarian belonging to the subfamily Geoplaninae. It is known from specimens found in Cantareira State Park, Brazil.
Cratera cuarassu is a species of land planarian belonging to the subfamily Geoplaninae. It is known from specimens found in Desengano State Park, Brazil.
Cratera joia is a species of land planarian belonging to the subfamily Geoplaninae. It is known from specimens found in Serra do Mar State Park in Brazil.
Gigantea urubambensis is a species of land planarian belonging to the subfamily Geoplaninae. It is known from specimens collected in rainforests of the Lower Urubamba River valley in Peru.
Obama decidualis is a species of land planarian belonging to the subfamily Geoplaninae. It is found within Brazil.
Choeradoplana abaiba is a species of land planarian belonging to the subfamily Geoplaninae. It is known from specimens found in Serra do Tabuleiro State Park in Brazil.
Choeradoplana pucupucu is a species of land planarian belonging to the subfamily Geoplaninae. It is found in areas within the Atlantic Forest in Brazil, such as Serra da Bocaina National Park and in municipalities such as Teresópolis, São José do Barreiro, Salesópolis, and Ribeirão Pires.
Cratera hina is a species of land planarian belonging to the subfamily Geoplaninae. It is known from specimens found in the Paranapiacaba Conservation Units Mosaic in Brazil.
Cratera taxiarcha is a species of land planarian belonging to the subfamily Geoplaninae. It is known from specimens found in Albert Löfgren State Park and Cantareira State Park in Brazil.
Cratera picuia is a species of land planarian belonging to the subfamily Geoplaninae. It is known from specimens found in Saint-Hilaire/Lange National Park in Brazil.
Cratera arucuia is a species of land planarian belonging to the subfamily Geoplaninae. It is known from specimens found in Intervales State Park in Brazil.
Cratera boja is a species of land planarian belonging to the subfamily Geoplaninae. It is known from specimens found in Serra da Bocaina National Park in Brazil.
Cratera tui is a species of land planarian belonging to the subfamily Geoplaninae. It is found in Serra da Bocaina National Park and Itatiaia National Park in Brazil.
Cratera imbiri is a species of land planarian belonging to the subfamily Geoplaninae. It is known from specimens found in Campos do Jordão State Park in Brazil.
Cratera paraitinga is a species of land planarian belonging to the subfamily Geoplaninae. It is known from specimens found in the Boracéia Biological Station in Brazil.
Issoca assanga is a species of land planarian belonging to the subfamily Geoplaninae. It is known from specimens found in Brazil.
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