{"title":"Clam Shrimp","authors":"F. Schram, S. Koenemann","doi":"10.1093/oso/9780195365764.003.0045","DOIUrl":"https://doi.org/10.1093/oso/9780195365764.003.0045","url":null,"abstract":"The clam shrimp, once thought to be a single order, are now viewed as three distinct orders within a cohort Diplostraca. Laevicaudata (or the lynceids) have ambiguous features such that they might be either closely related to Calmanostraca or stand as a sister group to a clade containing the rest of the Diplostraca. Lynceus has 11–13 limb-bearing somites in the thorax. Spinicaudata have 11–32 segments depending on the species, but the gonopores open on the 11th trunk somite. Cyclestheriida, however, is a sister taxon to the order Cladocera; it bears 16–18 pairs of trunk limbs in females and 15 pairs in males.","PeriodicalId":338672,"journal":{"name":"Evolution and Phylogeny of Pancrustacea","volume":" 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132075347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}