| Cratera arucuia | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Platyhelminthes |
| Order: | Tricladida |
| Family: | Geoplanidae |
| Genus: | Cratera |
| Species: | C. arucuia |
| Binomial name | |
| Cratera arucuia Lago-Barcia & Carbayo, 2018 | |
Cratera arucuia is a species of land planarian belonging to the subfamily Geoplaninae. [1] It is known from specimens found in Intervales State Park in Brazil. [2]
Cratera arucuia is a flatworm around 43 mm in length and 3 mm in width. The body is thin, with parallel margins, a rounded front tip, and a pointed back tip. The dorsal side of the body is a whitish cream base color, with an irregular median stripe made of small orange spots. An interval of the cream base may separate the stripe from dark gray or black lateral stripes that are mottled with eye halos. A mottled, marginal stripe of gray is outside of the lateral stripes, separated by a whitish cream interval. The ventral side of the body is a whitish color. [2]
Aside from its coloration, it is distinguished from other members of Cratera by having dorsal eyes that initiate in the head region, an ovoid and extrabulbar proximal section of the prostatic vesicle that is positioned dorsally above the penis bulb, a strongly developed penis bulb that extends 1.8 mm anterior to the penis, an ejaculatory duct that is not distally dilated, the presence of thick circular muscle surrounding the ejaculatory duct that is four times its diameter in the proximal region and twice in the distal, a penis papilla projecting into the female atrium, a male atrium that is 1.4 the length of the female, and the presence of a common glandular duct. [2]
The specific epithet, arucuia, is derived from the Tupi language words aru, "back, opposite side", and cuia, "gourd", in reference to the dorsal location of the ovoid or gourd-like prostatic vesicle. [2]
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 cryptolineata is a species of land planarian found in Brazil.
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 steffeni is a species of land planarian belonging to the subfamily Geoplaninae. It is found in Rio Grande do Sul, 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.
Choeradoplana albonigra is a species of land planarian belonging to the subfamily Geoplaninae. It is found in areas within the Atlantic Forest in Brazil, such as the Augusto Ruschi Biological Reserve, Desengano State Park, and the municipality of Teresópolis.
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.
Choeradoplana longivesicula is a species of land planarian belonging to the subfamily Geoplaninae. It is known from specimens found in General Carneiro, Brazil.
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 assu 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 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.
 | This flatworm- (or platyhelminth-) related article is a stub. You can help Wikipedia by expanding it. |