Sipunculidae, Rafinesque, 1814

Silva-Morales, Itzahí & Gómez-Vásquez, Julio D., 2021, First records and two new species of sipunculans (Sipuncula) from the Southern Mexican Pacific, European Journal of Taxonomy 740 (1), pp. 77-117 : 105

publication ID	https://doi.org/ 10.5852/ejt.2021.740.1283
publication LSID	lsid:zoobank.org:pub:07F1B593-9F4F-4B32-88D9-ADC5CA0BEB84
DOI	https://doi.org/10.5281/zenodo.4644479
persistent identifier	https://treatment.plazi.org/id/03CA87A4-D36C-803E-7900-415BFABE61CB
treatment provided by	Plazi
scientific name	Sipunculidae
status

Treatment

Family Sipunculidae View in CoL View at ENA

1. With a pair of protractor muscles ..................................... Xenosiphon branchiatus (Fischer, 1894) View in CoL

– Protractor muscles absent ....................................................................................... Sipunculus View in CoL ........2

2. With 42 or more LMB; digitate processes of the brain present .......................................................... ....................................................................... Sipunculus (Sipunculus) cf. polymyotus Fisher, 1947 View in CoL

– With 41 or less LMB; digitate processes of the brain absent.....................................................3

3. With 34 or less LMB; nephridia partially attached .......................................................................... ............................................................................... Sipunculus (Sipunculus) nudus Linnaeus, 1766 View in CoL

– With 35–41 LMB; nephridia unattached ............................................................................................ ......................................................... Sipunculus (Sipunculus) phalloides phalloides ( Pallas, 1774) View in CoL