Hausera

{{Short description|Genus of flatworms}} {{Speciesbox | name = ''Hausera hauseri'' | image = Hausera hauseri.jpg | display_parents = 2 | parent_authority = Leal-Zanchet & Souza, 2014 | taxon = Hausera hauseri | authority = Leal-Zanchet & Souza, 2014 | range_map = Hausera hauseri range map.jpg | range_map_caption = Location in [[Rio Grande do Norte]] }}

'''''Hausera''''' is a subterranean genus of [[Tricladida|planarian]] from Brazil. It contains only the single species '''''Hausera hauseri'''''. It is the first cave-dwelling member of the [[suborder]] [[Cavernicola (worm)|Cavernicola]] to have been observed in South America.<ref name="ZooKeys">{{cite journal |last1=Leal-Zanchet |first1=Ana |last2=Souza |first2=Stella |last3=Ferreira |first3=Rodrigo |date=23 September 2014 |title=A new genus and species for the first recorded cave-dwelling Cavernicola (Platyhelminthes) from South America |url=https://zookeys.pensoft.net/articles.php?id=4095 |journal=[[ZooKeys]] |publisher=Pensoft |issue=442 |pages=1–15 |doi=10.3897/zookeys.442.8199 |pmid=25349486 |accessdate=6 October 2014|pmc=4205493 |doi-access=free |bibcode=2014ZooK..442....1L }} {{open access}}</ref>

==Etymology== Both the genus and species were named after [[Josef Hauser (zoologist)|Josef Hauser]], a researcher of freshwater [[flatworm]]s.<ref name="ZooKeys" />

==Description== Specimens are {{convert|7.5|mm|in}} long and {{convert|2|mm|in}} wide. The [[Pharynx#Invertebrates|pharynx]] is {{convert|0.9|mm|in}} long, and along with the [[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 [[micrometre|μm]] 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]] are located behind but in proximity to the brain, approximately 0.6 millimeters behind the body's tip. The species is colorless.<ref name="ZooKeys" />

==Range and habitat== ''Hausera hauseri'' was found in a [[perennial stream]] in Crotes cave, part of the Lagedo do Rosário cave system in [[Felipe Guerra]], [[Brazil]]. The water in the stream was {{convert|10|cm|in}} to {{convert|15|cm|in}} deep.<ref name="ZooKeys" />

==References== {{Reflist}}

[[Category:Cavernicola (worm)]] [[Category:Flatworms of Brazil]] [[Category:Monotypic flatworm genera]]