Pallenopsis Wilson 1881
- Dataset
- Pycnogonida (Arthropoda) from Uruguayan waters (Southwest Atlantic): annotated checklist and biogeographic considerations
- Rank
- GENUS
Classification
- kingdom
- Animalia
- phylum
- Arthropoda
- class
- Pycnogonida
- order
- Pantopoda
- family
- Phoxichilidiidae
- genus
- Pallenopsis
discussion
Remarks: This genus has a long and complex taxonomic history in the southwest Atlantic, summarized by Stock (1973, 1975). Weis et al. (2014) analysed the existence of a species-complex within the traditional concept of Pallenopsis patagonica (Hoek, 1881). In fact, they referred it as “ one of the most taxonomically problematic and variable pycnogonid species known to date ”. Böhm (1879) recorded Pallenopsis fluminensis (Kroyer, 1844) (as Phoxichilidium fluminensis) from the Magellan Strait and Patagonia (54.9 – 76.8 m depth) based on material collected by the RV Gazelle in 1876, deposited in the Museum für Naturkunde der Humboldt-Universität zu Berlin. In the zoological report of the Gazelle expedition, Studer (1889) recorded that species (as Pallene fluminensis) from three stations, adding a third and deeper (80.5 m) record from the Uruguayan shelf. Schimkewitsch (1930) considered that Böhm’s specimens represent a new species: Pallenopsis boehmi. Stock (1973) redescribed this species, re-examining the material identified by Böhm as P. fluminensis (four specimens collected by the Gazelle), but considered that one specimen belongs to P. patagonica. Stock (1973) nominated a female specimen from the Magellan Strait as the Lectotype of P. boehmi. Due to insufficient labelling, it was not possible to establish which locality the specimen of P. patagonica belongs; either it was station LVII, 38 ° 10.1´S – 56 ° 26. 6´W, 54.9 m depth, off Buenos Aires Province, Argentina, or it belongs to station LX, 34 ° 43.7´S – 52 ° 36.1´W, 80.5 m depth, Uruguayan shelf (Stock 1973; Dunlop et al. 2007). Therefore, the records of Studer (1889) for both localities remain uncertain. According to Stock (1973, 1992), P. boehmi has a geographical distribution extending from the Strait of Magellan to southeast Brazil (ca. 23 ° 10´S). This distribution is biogeographically anomalous for a shelf species.
Name
- Homonyms
- Pallenopsis Wilson 1881
- Pallenopsis