Agelas dispar Duchassaing & Michelotti, 1864

Ugalde, Diana, Fernandez, Julio C. C., Gómez, Patricia, Lôbo-Hajdu, Gisele & Simões, Nuno, 2021, An update on the diversity of marine sponges in the southern Gulf of Mexico coral reefs, Zootaxa 5031 (1), pp. 1-112: 11

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Agelas dispar Duchassaing & Michelotti, 1864


Agelas dispar Duchassaing & Michelotti, 1864  

Tables 6, 7; Figs. 4A–C View FIGURE 4 , 16C View FIGURE 16

Synonymy and references: Agelas dispar Duchassaing & Michelotti (1864: 76)   , Muricy et al. (2011: 37), Parra- Velandia et al. (2014: 306), Rützler et al. (2014: 77) and Pérez et al. (2017: 11); Agelas sparsus   : see references compiled in Muricy et al. (2011: 38) and Parra-Velandia et al. (2014: 306); Agelas sparsus var. clavaeformis   , Agelas dispar   f. clavaeformis and Agelas sp. 2   , see references compiled in Parra-Velandia et al. (2014: 306).

Type locality. The Virgin Islands   .

Material examined. CNPGG-1309, CNPGG-1698, Alacranes reef (22.45838°N, 89.61122°W), 10–11 m depth, coll. Nuno Simões, 10 August 2016 GoogleMaps   ; CNPGG-2007, Cayo Arcas reef (20.20361°N, - 91.97611°W), 10 m depth, coll. Diana Ugalde, 30 August 2016 GoogleMaps   .

Description. Massive habit to lobate ( Fig. 16C View FIGURE 16 ), size 17 × 10 cm. Surface: smooth, pierced by pores. Oscules are round with slightly elevated collars, 0.5 to 1 cm in diameter. Brown color in vivo, and brown after preservation in ethanol. Consistency is elastic and compressible.

Skeleton. A regular reticulation of spongin fibers; with meshes 250 to 360 µm wide ( Fig. 4A View FIGURE 4 ). Primary fibers cored (1–9 spicules per cross-section) and echinated; diameters 50–120 µm. Secondary fibers are not cored and less echinated than primaries, 30–70 µm diameter, and some fibers are free of spicules ( Fig. 4B View FIGURE 4 ).

Spicules. Megascleres: Acanthostyles are usually slightly curved 83–104 (13.5) –130/3.9– 5.4 (1.1) –7.8 µm ( Fig. 4C View FIGURE 4 ).

Distribution. Mexico (current records), US (Florida)(de Laubenfels 1936), Bahamas, Cuba ( Alcolado 1976), other countries in the Caribbean Sea to Brazil ( Parra-Velandia et al. 2014).

Remarks. Our specimens correlate with those reported in the Caribbean region by Parra-Velandia et al. (2014). Some records assigned to A. dispar   need to be reassigned to their correct species, as in the case of A. dispar   from Veracruz reported by Green et al. (1986). We examined the specimens of Green et al. (1986) deposited in the CNPGG, and they corresponded indeed to A. sventres   , as has been reassigned by Parra-Velandia et al. (2014). Therefore, our specimens are the first record of Agelas dispar   in the SGoM.