TY - JOUR A1 - Itzahí, Silva-Morales A1 - Gómez-Vásquez, Julio D. T1 - First records and two new species of sipunculans (Sipuncula) from the Southern Mexican Pacific T2 - European journal of taxonomy N2 - Sipunculans are a poorly studied group in the Tropical Eastern Pacific. For the Southern Mexican Pacific (SMP) there is only one record of a sipunculan species. The main objective of this work was to determine the species composition of the phylum Sipuncula present in the SMP. The study area covered three Mexican states: Guerrero, Oaxaca and Chiapas; specimens from 28 localities were examined from both intertidal and subtidal zones. A total of 551 specimens were reviewed, from which 11 species were identified. Five of them have previously been recorded in the Tropical Eastern Pacific (TEP): Apionsoma (A.) hespera comb. nov., A. (Edmondsius) pectinatum, Aspidosiphon (A.) elegans, Phascolosoma (P.) puntarenae and Themiste (T.) hennahi; four species are similar to nominal species: Sipunculus (S.) cf. polymyotus, Siphonosoma cf. vastum, Siphonosoma cf. cumanense and Phascolosoma (P.) cf. perlucens; and two new species are described: Aspidosiphon (Paraspidosiphon) cutleri sp. nov. and Aspidosiphon (Paraspidosiphon) pastori sp. nov. A checklist and an identification key for all sipunculan species from the TEP are presented. The checklist includes 53 taxa, 25 of which are questionable records. This work generated 11 new records of sipunculans in the SMP and five new records in the TEP. T3 - European journal of taxonomy : EJT - 740:77-117 KW - Aspidosiphon KW - Chiapas KW - Guerrero KW - Oaxaca KW - Phascolosoma Y1 - 2021 UR - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/55758 UR - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-557581 SN - 2118-9773 VL - 2021 IS - 740 SP - 77 EP - 117 PB - Muséum National d'Histoire Naturelle CY - Paris ER -