Meland, Mees, Porter & Wittmann 2015
Meland, Mees, Porter & Wittmann 2015
MELAND, K., J. MEES, M. PORTER & K.J. WITTMANN, 2015. Taxonomic review of the orders Mysida and Stygiomysida (Crustacea, Peracarida). PLoS ONE 10 (4): e0124656.
https://doi.org/10.1371/journal.pone.0124656
Open access at http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0124656
The order Mysida (2 families, 178 genera, 1132 species) contains species across a broad range of habitats, such as subterranean, fresh, brackish, coastal, and surface to deep-sea habitats. The Stygiomysida (2 families, 2 genera, 16 species), however, are found primarily in subterranean waters, but always in waters with a marine influence. The Mysida and Stygiomysida body is divided into three main regions: cephalon, thorax, and abdomen. They are shrimp-like in appearance, containing morphological features earlier referred to as defining a "caridoid facies". The shrimp-like morphology was to some extent diagnostic for the historic Decapod taxa Schizopoda, containing the Nebalia, Mysida, Lophogastrida, and Euphausiacea. In 1904 the concept of Schizopoda was abandoned, and the Mysidacea (Mysida and Lophogastrida) along with Cumacea, Amphipoda, Isopoda, and Tanaidacea where placed in a new taxa, the Peracarida. Later discoveries of groundwater mysids led to the establishment of Stygiomysida, but placement to either Lophogastrida or Mysida remained unclear. The presence of oostegites and absence of podobranchiae, coupled with non-statocyst bearing uropods have been used to classify the Stygiomysida as a primitive Mysida family, comparable to Petalophthalmidae. On the other hand, equally suggestive characters, but for a Lophogastrida affiliation, was suggested for the archaic foregut characters and again, non-statocyst bearing uropods. With the inclusion of DNA sequence data of ribosomal genes sister group relationships between Stygiomysida, Lophogastrida, and Mictacea within the Peracarida is observed, which supports a classification of the Stygiomysida as a separate order removed from the Mysida.
taxonomy; morphology; biosystematics; phylogeny
Aberomysini; Aberomysis muranoi; Amblyops kempi; Anchialidae; Anchialina typica; Arachnomysis leuckartii; Archaeomysidae; Archaeomysinae; Archaeomysis grebnitzkii; Boreomysis megalops; Boreomysis tridens; Calyptomma puritani; Calyptomminae; Calyptommini; Cancer bipes; Cancer flexuosus; Cancer oculatus; Cancer pedatus; Chalaraspidae; Cynthia; Cynthilinae; Cynthinae; Decapoda; Elder unguiculata; Erythropinae; Erythropini; Eucopia praecursor; Eucopiidae; Euphausiacea; Euphausidae; Euphausiidae; Francocaris grimmi; Gastrosaccinae; Gastrosaccinae; Gastrosaccus mediterraneus; Gastrosaccus sanctus; Gnathophausiidae; Hansenomysinae; Hansenomysis fyllae; Hemimysinae; Heteromysinae; Heteromysini; Heteromysis microps; Isopoda; Lepidomysidae; Leptomysidae; Leptomysinae; Leptomysini; Leptomysis gracilis; Lophogaster typicus; Lophogaster voultensis; Lophogastrida; Lophogastridae; Loxopis; Macromysis; Malacostraca; Mancomysini; Mesopodopsis; Metasiriellini; Michthyops parva; Michthyops parvus; Mysida; Mysidacea; Mysidae; Mysidea; Mysidellinae; Mysidopsis oligocenica; Mysimenzies hadalis; Mysinae; Mysini; Mysis relicta; Nebalia; Nebaliidae; Neomysis integer; Palaumysinae; Paramysis; Peachocarididae; Peachocaris acanthouraea; Peachocaris strongi; Peracarida; Petalophthalmidae; Petalophthalminae; Petalophthalmus; Pontomysidae; Praunus flexuosus; Praunus integer; Promysis; Protomysidae; Protomysidellinae; Pseudomma antarcticum; Pseudomma parvum; Pygocephalomorpha; Rhopalophthalminae; Sarmysis; Schimperella acanthocercus; Schimperella beneckei; Schimperella kessleri; Schistomysis assimilis; Schistomysis spiritus; Schizopoda; Siriella antiqua; Siriella armata; Siriella carinata; Siriella norvegica; Siriella thompsonii; Siriellinae; Siriellini; Spelaeomysis bottazzii; Spelaeomysis cardisomae; Spelaeomysis cochinensis; Spelaeomysis servatus; Stomatopoda; Stygiomysida; Stygiomysidae; Stygiomysis holthuisi; Thalassomysinae; Thalassomysis; Troglomysis vjetrenicensis