Cyclocoelidae Stossich, 1902
publication ID |
https://doi.org/ 10.11646/zootaxa.4053.1.1 |
publication LSID |
lsid:zoobank.org:pub:5D898449-E50A-4F70-B82B-BF2281A95F12 |
DOI |
https://doi.org/10.5281/zenodo.6108891 |
persistent identifier |
https://treatment.plazi.org/id/317187CD-FFE4-771A-BEB0-A71B9BF38DF3 |
treatment provided by |
Plazi |
scientific name |
Cyclocoelidae Stossich, 1902 |
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Family Cyclocoelidae Stossich, 1902 View in CoL
Diagnosis. Medium-sized to large flatworms, lanceolate, body often tapered anteriorly and rounded posteriorly. Oral sucker, if present, usually poorly developed. Acetabulum generally absent, but reported in some species. Mouth subterminal, prepharynx generally shorter than esophagus, ceca frequently simple, inner wall sometimes irregular, undulating in overall appearance in some species, united near posterior extremity to form characteristic cyclocoel. Testes oval to elongate, borders smooth or irregular, tandem to diagonal, rarely side by side, usually located near posterior end, but may be equatorial to preequatorial in some species. Genital pore near midline of body, prepharyngeal, pharyngeal or postpharyngeal. Cirrus sac present, enclosing seminal vesicle, extending posteriorly to level of posterior aspect of esophagus to immediately postbifurcal. Ovary oval to elongate, intertesticular, pretesticular or posttesticular, forming a triangle or in a straight line with testes. Uterus intercecal to extracecal, uterine seminal receptacle present in some species. Vitellarium follicular, ventral and somewhat lateral to ceca, vitelline fields reaching to, or beyond, cecal bifurcation anteriorly, confluent posteriorly or not. Excretory vesicle generally Y-shaped, branches extending anterior to level of pharynx or beyond, reticulate where known. Excretory pore usually somewhat subterminal opening on dorsal surface, may approach being terminal in some species. Life cycles, where known, utilize either freshwater or terrestrial snails, polyembryony produces tailless cercariae that encyst in either the rediae where they were produced or in the tissue of snails. Adults in body cavity, lungs, air sacs, nasal and infraorbital sinuses, or hypothalamus of birds.
Type genus. Cyclocoelum Brandes, 1892 .
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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