Svenzea zeai ( Alvarez, van Soest & Rützler, 1998 )
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publication ID |
https://doi.org/ 10.11646/zootaxa.5031.1.1 |
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publication LSID |
lsid:zoobank.org:pub:CC3A59D1-E09E-407E-93F4-4796FD3D7C19 |
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persistent identifier |
https://treatment.plazi.org/id/110587B3-4D35-4851-FF53-F934485830F2 |
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treatment provided by |
Plazi |
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scientific name |
Svenzea zeai ( Alvarez, van Soest & Rützler, 1998 ) |
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Svenzea zeai ( Alvarez, van Soest & Rützler, 1998) View in CoL
Tables 6, 7; Figs. 59A–D View FIGURE 59 , 70B View FIGURE 70
Synonymy and references: Pseudaxinella zeai Alvarez et al. (1998: 20) .
Type locality. Colombia .
Material examined. CNPGG-2284, Triangulo Este reef (20.89108°N, 92.23992°W), 20 m depth, coll. Oscar Bocardo, 12 September 2017.
Description. Massive habit, with globular to volcano-shaped mounds ( Fig. 70B View FIGURE 70 ). The size of the specimen is 22 × 12 × 7 cm. The surface is smooth and velvety, not visible zoanthids. Oscules on the top of the mounds, 1–1.5
cm diameter. Dark-brown color in vivo, beige inside, and it turned light brown in ethanol. The consistency is highly crumbly.
Skeleton. Ectosomal skeleton is difficult to discern since there are many blackish granular cells ( Fig. 59A View FIGURE 59 ). The choanosomal skeleton consists of an irregular isotropic reticulation with 1–3 spicules at all sides ( Fig. 59B View FIGURE 59 ). Single spicules protrude outside the surface ( Fig. 59A View FIGURE 59 ).
Spicules. Megascleres: Styles slightly curved ( Fig. 59C–D View FIGURE 59 ), 190– 231 (36.6)–310/5– 7.7 (1.3)–10 µm, and oxeas ( Fig. 59C–D View FIGURE 59 ), 170– 234 (42.7)–290/7– 8.5 (0.9)–9.5 µm.
Distribution. Mexico (current record), other countries in the Caribbean Sea ( Alvarez et al. 2002).
Remarks. Svenzea zeai is characterized by the smallest spicules in the genus ( Table 4) and a massive habit with volcano-shaped mounds not comparable to the other five Svenzea species. Although Svenzea germanyanezi Gómez & Calderón-Gutiérrez (2020) has a conical shape, it differs in its choanosomal skeleton composed by a subisodictial network, formed by unispicular or occasionally paucispicular tracts. Also, S. germanyanezy is stygobiont, 5.6 m depth, while S. zeai is a coral reef dweller, 18–20 m depth.
Svenzea zeai is a widespread species in the Caribbean Sea ( Alvarez et al. 2002). Rützler et al (2009) referred the species to the GoM, but their reference to Alvarez et al (1998) as the source for that record is mistaken, as no mention of the Gulf is made for Pseudaxinella (?) zeai by the latter authors. Accordingly, the specimen studied here constitute the first record of the species in this area.
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