# Hausera

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Genus of flatworms

Hausera hauseri Scientific classification Kingdom: Animalia Phylum: Platyhelminthes Order: Tricladida Infraorder: Cavernicola Genus: Hausera Leal-Zanchet & Souza, 2014 Species: H. hauseri Binomial name Hausera hauseri Leal-Zanchet & Souza, 2014 Location in Rio Grande do Norte

***Hausera*** is a subterranean genus of [planarian](/source/Tricladida) from Brazil. It contains only the single species ***Hausera hauseri***. It is the first cave-dwelling member of the [suborder](/source/Suborder) [Cavernicola](/source/Cavernicola_(worm)) to have been observed in South America.[1]

## Etymology

Both the genus and species were named after [Josef Hauser](/source/Josef_Hauser_(zoologist)), a researcher of freshwater [flatworms](/source/Flatworm).[1]

## Description

Specimens are 7.5 millimetres (0.30 in) long and 2 millimetres (0.079 in) wide. The [pharynx](/source/Pharynx#Invertebrates) is 0.9 millimetres (0.035 in) long, and along with the [gonopore](/source/Gonopore) is located in the hindmost third of the body. While it lacks eyes, the head has a pair of ciliated sensory organs approximately 140 [μm](/source/Micrometre) back from the body's anterior end. The intestine extends into the brain and connects with the reproductive system via a genito-intestinal duct. The testicular follicles are arranged in uneven rows near the margins of the body, and the [ovaries](/source/Ovaries) are located behind but in proximity to the brain, approximately 0.6 millimeters behind the body's tip. The species is colorless.[1]

## Range and habitat

*Hausera hauseri* was found in a [perennial stream](/source/Perennial_stream) in Crotes cave, part of the Lagedo do Rosário cave system in [Felipe Guerra](/source/Felipe_Guerra), [Brazil](/source/Brazil). The water in the stream was 10 centimetres (3.9 in) to 15 centimetres (5.9 in) deep.[1]

## References

1. ^ [***a***](#cite_ref-ZooKeys_1-0) [***b***](#cite_ref-ZooKeys_1-1) [***c***](#cite_ref-ZooKeys_1-2) [***d***](#cite_ref-ZooKeys_1-3) Leal-Zanchet, Ana; Souza, Stella; Ferreira, Rodrigo (23 September 2014). ["A new genus and species for the first recorded cave-dwelling Cavernicola (Platyhelminthes) from South America"](https://zookeys.pensoft.net/articles.php?id=4095). *[ZooKeys](/source/ZooKeys)* (442). Pensoft: 1–15. [Bibcode](/source/Bibcode_(identifier)):[2014ZooK..442....1L](https://ui.adsabs.harvard.edu/abs/2014ZooK..442....1L). [doi](/source/Doi_(identifier)):[10.3897/zookeys.442.8199](https://doi.org/10.3897%2Fzookeys.442.8199). [PMC](/source/PMC_(identifier)) [4205493](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4205493). [PMID](/source/PMID_(identifier)) [25349486](https://pubmed.ncbi.nlm.nih.gov/25349486). Retrieved 6 October 2014.

Taxon identifiers Hausera Wikidata: Q18348719 Wikispecies: Hausera GBIF: 9063093 iNaturalist: 475820 IRMNG: 1481625 ITIS: 1037548 Open Tree of Life: 7504480 WoRMS: 878824

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