| SYSTEMATIC BIOLOGY |
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| HOME | SYLLABUS | WEEKLY ASSIGNMENTS | J. SYSTEMATIC BIOLOGY | TAXA OF LIFE | |
| TAXONOMY OF THE PARACOELOMATA | |||||
Giribet et al. (2000) identified a clade of pseudocoelomate taxa that included the Platyhelminthes. Thus, they called the group the Platyzoa. However, with the placement of the flatworms in the Eutrochozoa, the clade was renamed Paracoelomata (Valentine 2004). The paracoelomates are all relatively small and most have a pseudocoelom, a persistent blastoceol also called a paracoelomic condition. Some have no body cavity at all (Gnathostomozoa, Entoprocta, Cycliophora, and Gastrotricha; from Valentine 2004). Most have a ciliated body surface and feed by a ciliary field that surrounds the mouth. Please consult The Major Clades of the Animal Kingdom for some views on the relationships of the eucoelomate protostome phyla with each other and with the other phyla of protostomes.
CLASS GASTROTRICHIDA
Chaetonotus, Tetranchyroderma, Dactylopodula, Macrodasys, Platydasys, Pleurodasys, Turbanella, Urodasys, Neodasys, Aspidophorus, Dasydytes, Lepidodermella.
CLASS SEISONIDEA (1 ORDER)
Seison.
CLASS BDELLOIDEA (1 ORDER)
Philodina, Embata, Rotaria, Adineta.
CLASS MONOGONATA (3 ORDERS)
Notommata, Proales, Polyarthra, Synchaeta, Chronogaster, Gastropus, Brachionus, Asplanchna, Euchlanis, Keratella, Conochilus, Floscularia, Hexarthra, Testudinella, Stephanoceros, Collotheca, Epiphanes.
CLASS ARCHIACANTHOCEPHALA (4 ORDERS)
Macrocanthorhynchus, Moniliformis, Oligacanthorhynchus.
CLASS EOCANTHOCEPHALA (2 ORDERS)
Neochinorhynchus, Pallisentis, Bolbosoma.
CLASS PALEACANTHOCEPHALA (2 ORDERS)
Acanthocephalus, Centrorhynchus, Corynosoma, Echinorhynchus, Leptorhynchoides, Polymorphus.
CLASS ENTOPROCTIDA
Urnatella, Loxosoma, Loxosomella, Loxokalypus, Myosoma, Pedicellina, Bartensia, Gonypodaria..
CLASS CYCLIOPHORIDA
Symbion.
CLASS GNATHOSTOMULIDA (2 ORDERS)
Gnathostomula, Problognathia, Haplognathia, Pterognathia, Austrognathia.
CLASS CHAETOGNATHIDA (2 ORDERS)
Gephyrospadella, Paraspadella, Spadella, Aberrospadella, Bathyspadella, Eukrohnia, Heterkrohnia, Krohnittella, Kukrohnia, Zahonya, Tokiokaspadella.
Bathybelos, Caecosagitta, Parasagitta, Sagitta, Pterosaggita, Krohnitta.
This page is maintained by Jack R. Holt. Last modified: 04/22/08.