An update on the diversity of marine sponges in the southern Gulf of Mexico coral reefs Author Ugalde, Diana diana.ugalde@ciencias.unam.mx Author Fernandez, Julio C. C. juliocesarbio@yahoo.com.br Author Gómez, Patricia Author Lôbo-Hajdu, Gisele glhajdu@uerj.br Author Simões, Nuno diana.ugalde@ciencias.unam.mx text Zootaxa 2021 2021-09-03 5031 1 1 112 http://zoobank.org/cc3a59d1-e09e-407e-93f4-4796fd3d7c19 journal article 10.11646/zootaxa.5031.1.1 1175-5326 5454380 CC3A59D1-E09E-407E-93F4-4796FD3D7C19 Amphimedon compressa Duchassaing & Michelotti, 1864 Tables 6 , 7 ; Figs. 30A–B , 36M Synonymy and references: Amphimedon arborscens Lamarck (1814: 446) ; Spongia arborescens Lamarck (1814: 446) ; Spongia rubens Duchassaing & Michelotti (1864: 41) ; Amphimedon arborescens Duchassaing & Michelotti (1864: 79) ; Haliclona rubens Laubenfels de (1953: 519) , Hartman (1955: 167) , Green (1977: 86) ; Amphimedon arborscens var. ensiformis Duchassaing & Michelotti (1864: 79) ; Haliclona ( Amphimedon ) compressa , Amphimedon aff. compressa and Amphimedon sp. : see references compiled in Muricy et al. (2011: 103) ; Amphimedon compressa Duchassaing & Michelotti (1864: 78) , Green et al . (1986: 134) , Gómez (2002:82) , Muricy et al. (2011: 103) . Type locality. The Virgin Islands . Material examined. CNPGG –1900, Alacranes reef ( 22.39255°N , 89.69508°W ), 5 m depth , coll. Oscar Bocardo , 15 May 2016 ; CNPGG –1950, Cayo Arcas reef ( 20.19161°N , - 91.99086°W ), 12.5 m depth , coll. Oscar Bocardo , 23 August 2016 ; CNPGG –2290, Banco Obispo Norte reef ( 20.4946°N , - 92.20378°W ), 24 m depth , coll. Oscar Bocardo , 13 September 2017 ; CNPGG –2403, Hornos reef ( 19.19083°N , - 96.11777°W ), 3 m depth , coll. Diana Ugalde , 27 August 2018 ; CNPGG –2419, Isla Verde reef ( 19.20166°N , - 96.07094°W ), 3.8 m depth , coll. Diana Ugalde , 28 August 2018 ; CNPGG –2437, CNPGG –2438, CNPGG –2440, Cabezo reef ( 19.05086°N , - 95.82388°W ), 9.3–9.5 m depth , coll. Diana Ugalde , 28 August 2018 . FIGURE 30. Amphimedon compressa Duchassaing & Michelotti, 1864 (CNPGG-2403), skeleton and spicules: A. transversal section of the skeleton; B. oxeas. Scale bars: A = 250 µm; B = 50 µm. Distribution. Mexico ( Hartman 1955 ; Green 1977 as Haliclona rubens ; Gómez & Green 1984 ; Green et al. 1986 ; Gómez 2002 ; Maas-Vargas 2004 ; González-Gándara et al. 2009 ; De la Cruz-Francisco & Bandala-Pérez 2016 ; current records), Bahamas , US ( Florida ), other countries in the Caribbean Sea; Brazil ( Muricy et al . 2011 ). Remarks. Amphimedon compressa is a common inhabitant of the coral reefs in the GoM; it has been recorded in different coral reefs of Veracruz ( Green et al. 1986 ; Gómez 2007 , 2011 ; González-Gándara et al. 2009 ), as well as in the Campeche Bank by Hartman (1955 , as Haliclona rubens ). We observed this species frequently in different coral reefs at the Campeche Bank. A. compressa had also been reported by several authors, in the northern GoM ( Rützler et al. 2009 ) and off Quintana Roo ( Gómez 2002 ; Maas-Vargas 2004 ).