Updated checklist and identification key of benthic tanaidaceans (Crustacea Peracarida) of the sublittoral zone of the northern Yucatan Peninsula, Mexico Abarca-Ávila, Mónica Mariel Herrera-Dorantes, María Teresa Winfield, Ignacio Ardisson, Pedro-Luis Zootaxa 2019 2019-12-13 4711 1 51 76 4CTWK (Bacescu 1980) Bacescu 1980 [167,717,1964,1991] Malacostraca Apseudidae Paradoxapseudes Animalia Tanaidacea 3 54 Arthropoda species bermudeus   Material examined. TA: 125 individuals. CNCR35343. Tr-Loc: Madagascar, Yucatan, Mexico, 21°26’30.12’’N 90°17’25.9’’W, 37 individuals, 29 May 2012, coll. GR, IW, MA, UP, collected at 15 mdepth; Tr-Loc: Sisal, Yucatan, Mexico, 21°20’54.4’’N 90°08’52.5’’W, 22 individuals, 30 May 2012, coll. GR, IW, MA, UP, collected at 9 mdepth; Tr-Loc: Tanchit, Yucatan, Mexico, 21°21’53.3’’N 90°04’05.4’’W, 50 individuals, 31 May 2012, coll. GR, IW, MA, UP, collected at 8 mdepth; Tr-Loc: Bajo Diez, Yucatan, Mexico, 21°20’50.8’’N 90°08’53.0’’W, six individuals, 04 June 2012, coll. GR, IW, MA, UP, collected at 11 mdepth; Tr-Loc: Bocacha, Yucatan, Mexico, 21°19’17.3’’N 90°20’02.6’’W, ten individuals, 04 June 2012, coll. GR, IW, MA, UP, collected at 8 mdepth. These specimens were collected in sponges such as  Aiolochroia crassa(Hyatt),  Aplysina fistularis(Pallas),  Clathria( Clathria) foliaceaTopsent,  Igernella notabilis(Duchassaing & Michelotti), algae such as  Dictyopteris delicatulaJ.V.Lamourouxand  Dictyota dichotoma(Hudson) J.V.Lamouroux, coral rubble. The abundance of females was not recorded for this species.  Local distribution.Consult Cházaro-Olvera et al.(2018).  Geographical distribution.Atlantic Ocean: Bermuda, east coast of United States, South Carolina, and Florida; GoM: Tuxpan-Lobos Protected Natural Area, Veracruz Reef System National Park; Caribbean Sea: Puerto Morelos Reef National Park, Quintana Roo.  Recognition characters.Peduncle of antennule with small tubercles on inner margin; rostrum rounded with a small acute process; pereopod-1 with a coxal spine; chela strong (male type) in adult females.   Remarks.This is a hermaphroditic species that was captured for the first time in a cave near the sea coast, in the company of  NannastacusBate, and also inhabits live bottom substrata, associated with sponges such as  A. fistularis,  Amphimedon compressaDuchassaing & Michelotti,  Chondrilla nuculaSchmidt,  Geodia neptuni(Sollas)and  I. notabilis, algae such as  D. dichotomaand  Ulva lactucaLinnaeus, coral rubble and wood, in depths 1 to 50 m.   References. Băcescu (1980);  Heard et al. (2004); García-Madrigal et al. (2005); Guţu (2008); Winfield et al. (2013); Monroy-Velázquez et al. (2017); Winfield et al. (2017); Cházaro-Olvera et al. (2018).