First records and two new species of sipunculans (Sipuncula) from the Southern Mexican Pacific

  • 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.

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Author:Silva-Morales Itzahí, Julio D. Gómez-Vásquez
Parent Title (English):European journal of taxonomy
Series (Serial Number):European journal of taxonomy : EJT (740:77-117)
Publisher:Muséum National d'Histoire Naturelle
Place of publication:Paris
Document Type:Article
Date of Publication (online):2021/03/25
Date of first Publication:2021/03/25
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2021/05/17
Tag:Aspidosiphon; Chiapas; Guerrero; Oaxaca; Phascolosoma
Page Number:41
First Page:77
Last Page:117
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 59 Tiere (Zoologie) / 590 Tiere (Zoologie)
Sammlungen:Sammlung Biologie / Sondersammelgebiets-Volltexte
Licence (German):License LogoCreative Commons - Namensnennung 4.0