Svenzea tubulosa ( Alcolado & Gotera, 1986 )
publication ID |
https://doi.org/ 10.11646/zootaxa.5031.1.1 |
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lsid:zoobank.org:pub:CC3A59D1-E09E-407E-93F4-4796FD3D7C19 |
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https://treatment.plazi.org/id/110587B3-4D36-482F-FF53-F8B04BAB3364 |
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Svenzea tubulosa ( Alcolado & Gotera, 1986 ) |
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Svenzea tubulosa ( Alcolado & Gotera, 1986) View in CoL
Tables 6, 7; Figs. 57A–C View FIGURE 57 , 58L View FIGURE 58 , 70A View FIGURE 70
Synonymy: Scopalina tubulosa Alcolado & Gotera (1986: 6) . Type locality. Cuba, Greater Antilles
Material examined. CNPGG-2166, Cayo Arcas reef (20.1949°N, 91.9574°W), 8 m depth, coll. Diana Ugalde, 24 April 2018 GoogleMaps ; CNPGG-2198, Cayo Arcas reef (20.1956°N, 91.9599°W), 6.7 m depth, coll. Diana Ugalde, 20 August 2018 GoogleMaps ; CNPGG-2232, Cayo Arcas reef (20.1956°N, 91.9599°W), 10.2 m depth, coll. Diana Ugalde, 24 August 2018 GoogleMaps ; CNPGG-2272, Triangulo Este reef (20.8976°N, 92.2421°W), 14.1 m depth, coll. Oscar Bocardo, 11 September 2017 GoogleMaps ; CNPGG-2370, Banco Nuevo reef (20.5456°N, 91.8794°W), 20 m depth, coll. Oscar Bocardo, 15 September 2017 GoogleMaps ; CNPGG-2472, Alacranes reef (22.5424°N, 89.7486°W), 15 m depth, coll. Diana Ugalde, 25 June 2016 GoogleMaps .
Description. Tubular habit, erect, in single tubes or forming clusters of two to four tubes ( Figs. 58L View FIGURE 58 , 70A View FIGURE 70 ), 3–8 cm high, the surface is optically smooth but microhispid to the touch. Oscules on the top of the tubes splitted in two apertures, 5 mm to 1 cm in diameter each. Pores visible along the tubes 1–2 mm diameter. The color is ochre yellow in vivo at the outside part, and white color inside, beige when in ethanol. The consistency is firm but compressible, easy to cut.
Skeleton. Choanosomal skeleton is an ill-defined isotropic net, forming meshes ( Fig. 57A View FIGURE 57 ), 150–250–550 µm in diameter, ascending tracts let single spicules protrude outside the surface ( Fig. 57B View FIGURE 57 ).
Spicules. Megascleres. Styles slightly curved with hastate tip ( Fig. 57C View FIGURE 57 ), 310– 325 (34.2)–430/7.5– 10.5 (2.9)– 16.5 µm.
Distribution. Mexico (current records), Cuba ( Alcolado & Gotera 1986).
Remarks. The specimens assigned to S. tubulosa conform thoroughly to the original description of Alcolado & Gotera (1986). A somewhat wider range in spicule dimensions is detected in our specimens ( Table 4). Svenzea tubulosa is easily distinguished from the other five Svenzea species reported in the TNwA by its tubular morphology and skeletal architecture, which consists of an almost isotropic network, absent from other species of the genus. Our material is the first record of S. tubulosa for the GoM, and this is the first record of the species since Alcolado & Gotera’s original description. Svenzea tubulosa is recorded herein at four coral reefs in the Campeche Bank, including Alacranes reef. Hence, we expect that the species may have wide geographical distribution in the southern GoM.
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