Tubicolous polychaete worms (Annelida) from Bahia de Chamela Islands Sanctuary, Mexico, with the description of a new bamboo worm Author Yanez-Rivera, Beatriz CONACYT- Centro de Investigacion en Alimentacion y Desarrollo A. C. (CIAD), Unidad Mazatlan en Acuicultura y Manejo Ambiental, Mazatlan, Mexico https://orcid.org/0000-0002-3192-2142 beyariv@ciad.mx Author Tovar-Hernandez, Maria Ana Universidad Autonoma de Nuevo Leon, Facultad de Ciencias Biologicas, Laboratorio de Biosistematica, San Nicolas de los Garza, Nuevo Leon, Mexico https://orcid.org/0000-0002-5263-2830 maria_ana_tovar@yahoo.com Author Galvan-Villa, Cristian Moises Universidad de Guadalajara, Centro Universitario de Ciencias Biologicas y Agropecuarias, Departamento de Ecologia, Zapopan, Mexico https://orcid.org/0000-0003-1927-2500 Author Rios-Jara, Eduardo Universidad de Guadalajara, Centro Universitario de Ciencias Biologicas y Agropecuarias, Departamento de Ecologia, Zapopan, Mexico text Biodiversity Data Journal 2020 8 57572 57572 http://dx.doi.org/10.3897/BDJ.8.e57572 journal article http://dx.doi.org/10.3897/BDJ.8.e57572 1314-2828-8-e57572 CE3CFA74ABAA48A49EB22776C731837F 9627C5A06E285DBFB389A57DFEE8433F Hydroides brachyacantha Rioja, 1941 Hydroides brachyacantha in Rioja 1941a : 169-172, pl. 3, fig. 2, pl. 4, figs. 1-9.- Sun et al. 2016 : 49-54, figs. 5, 6A-F.- Bastida-Zavala et al. 2016 : 413-414, figs. 3, 11B.- Chavez-Lopez and Cruz-Gomez 2019 : 162. Hydroides brachyacanthus .- Bastida-Zavala and ten Hove 2003 : 73-76, figs. 3A-M, 7A-F.- Cinar 2006 : 225-226, fig. 2.- Bastida-Zavala 2008 : 22-23, fig. 6C.- Tovar-Hernandez et al. 2009 : 328-330, figs. 3j, 7d-f. Materials Type status: Other material . Occurrence: catalogNumber: LEMA-PO169 ; recordedBy: Beatriz Yanez-Rivera ; individualCount: 2 ; Taxon: phylum: Annelida; class: Polychaeta; order: Sabellida; family: Sabellidae; genus: Hydroides; Location: higherGeographyID: Pacific Ocean; higherGeography: Tropical Eastern Pacific; continent: America; islandGroup: Islas de Chamela; island: Isla Cocinas; country: Mexico ; countryCode: MX; stateProvince: Jalisco; municipality: La Huerta; minimumDepthInMeters: 3; maximumDepthInMeters: 4; verbatimLatitude: 19°32 '45'' N ; verbatimLongitude: 105°06 '27'' W ; Identification: identifiedBy: Maria Ana Tovar-Hernandez ; Event: samplingProtocol: Scuba dive ; eventDate: June 27, 2013 ; year: 2013; month: 6; day: 27; habitat: On coral; fieldNumber: Site 15; Record Level: language: Spanish; institutionID: Universidad de Guadalajara; collectionID: Coleccion Biologica del Laboratorio de Ecosistemas Marinos y Acuicultura; institutionCode: UDG ; collectionCode: LEMA Type status: Other material . Occurrence: catalogNumber: LEMA-PO170 ; recordedBy: Beatriz Yanez-Rivera ; individualCount: 7 ; Taxon: phylum: Annelida; class: Polychaeta; order: Sabellida; family: Sabellidae; genus: Hydroides; Location: higherGeographyID: Pacific Ocean; higherGeography: Tropical Eastern Pacific; continent: America; islandGroup: Islas de Chamela; island: Isla Pajarera; country: Mexico ; countryCode: MX; stateProvince: Jalisco; municipality: La Huerta; maximumDepthInMeters: 7; verbatimLatitude: 19°33 '22'' N ; verbatimLongitude: 105°06 '50'' W ; Identification: identifiedBy: Maria Ana Tovar-Hernandez ; Event: samplingProtocol: Scuba dive ; eventDate: June 26, 2013 ; year: 2013; month: 6; day: 26; habitat: On rock-coral; fieldNumber: Site 21; Record Level: language: Spanish; institutionID: Universidad de Guadalajara; collectionID: Coleccion Biologica del Laboratorio de Ecosistemas Marinos y Acuicultura; institutionCode: UDG ; collectionCode: LEMA Type status: Other material . Occurrence: catalogNumber: LEMA-PO171 ; individualCount: 1 ; Taxon: phylum: Annelida; class: Polychaeta; order: Sabellida; family: Sabellidae; genus: Hydroides; Location: higherGeographyID: Pacific Ocean; higherGeography: Tropical Eastern Pacific; continent: America; islandGroup: Islas de Chamela; island: Isla Pajarera; country: Mexico ; countryCode: MX; stateProvince: Jalisco; municipality: La Huerta; minimumDepthInMeters: 3; maximumDepthInMeters: 4; verbatimLatitude: 19°33 '29'' N ; verbatimLongitude: 105°06 '40'' W ; Identification: identifiedBy: Maria Ana Tovar-Hernandez ; Event: samplingProtocol: Snorkel ; eventDate: June 27, 2013 ; year: 2013; month: 6; day: 27; habitat: On coral; fieldNumber: Site 20; Record Level: language: Spanish; institutionID: Universidad de Guadalajara; collectionID: Coleccion Biologica del Laboratorio de Ecosistemas Marinos y Acuicultura; institutionCode: UDG ; collectionCode: LEMA Description Body 8-10 mm long, 0.8-1 mm wide. Radiolar crown length 1.5-1.7 mm with 8-10 pairs of radioles. Thorax with seven chaetigers and abdomen with 61-64 segments. Verticil with 8-12 yellow to dark brown spines unequal in size (Fig. 13 D-H). Dorsal hook broad, curved, larger than all other spines, covering central disc. Other spines with pointed tip and pronounced knob each. First and second pair of dorsal spines (lateral to dorsal hook) with tips and trunks wider than all other spines (Fig. 13 D-H). Collar chaetae bayonet with two blunt teeth; distal blade smooth. Taxon discussion Hydroides brachyacantha Rioja, 1941 ( Rioja 1941a ), an important fouling serpulid species originally described from Mazatlan (Southern Gulf of California, Mexico) and Acapulco (southern Mexican Pacific), has been reported from the Mexican Pacific and numerous tropical and subtropical localities ( Rioja 1941a , Tovar-Hernandez et al. 2009 , Bastida-Zavala and ten Hove 2003 , Bastida-Zavala 2008 , Bastida-Zavala et al. 2016 ). At the Mazatlan Port, the mean annual density of H. brachyacantha during 2009 was 80 ind m-2 (fouling assemblages in metallic buoys), with a minimum of 4 ind m-2 in November and a maximum of 304 ind m-2 in March ( Sun et al. 2016 ). Recently, a neotype was established by Sun et al. (2016) , who also demonstrated that the previous records from the species in Australia belongs to a different lineage.