Haliclona (Halichoclona) albifragilis ( Hechtel, 1965 )

Bettcher, Larissa, Fernandez, Julio C. C., Gastaldi, Marianela, Bispo, André, Leal, Camille V., Leite, Dora, Avelino-Alves, Dhara, Clerier, Pedro H. B., Rezende, Dafinny, Gulart, Clara M. R., Pinheiro, Ulisses & Hajdu, Eduardo, 2023, Checklist, diversity descriptors and selected descriptions of a highly diverse intertidal sponge (Porifera) assemblage at Costa do Descobrimento (Bahia, Brazil), Zootaxa 5277 (3), pp. 443-489 : 465-469

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https://doi.org/ 10.11646/zootaxa.5277.3.2

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Haliclona (Halichoclona) albifragilis ( Hechtel, 1965 )


Haliclona (Halichoclona) albifragilis ( Hechtel, 1965) View in CoL

( Tab. 1–2, 8; Fig. 11A–J View FIGURE 11 )

Synonymy. Adocia albifragilis, Hechtel (1965) .

Studied material. MNRJ 22236 View Materials , P.M.M. Coroa Alta (16°13.200′ S, 38°57.038′ W, Santa Cruz Cabrália, BA, Brazil), intertidal, coll. Fioravanso, A. & Gastaldi, M., 22 nd April 2019 GoogleMaps . MNRJ 21903 View Materials , Recife do Mutá (16°20.721′ S, 39°0.067′ W, Porto Seguro, BA, Brazil), intertidal, coll. Fioravanso, A. & Gastaldi, M., 20 th April 2019 GoogleMaps .

Description. Encrusting (0.2 cm thick), 2.0 cm maximum length. Surface rugose, with a few scattered oscules, 0.2 cm in diameter. Consistency compressible, but easily torn. Color in vivo beige translucent, and beige in fixative ( Tab. 8; Figs. 11A–B View FIGURE 11 ).

Skeleton. Ectosome with an isodictyal reticulation, moderate spongin and paucispicular tracts. Choanosome with an irregular subisodictyal reticulation, paucispicular tracts and occasional reinforcing spongin ( Figs. 11C–D View FIGURE 11 ).

Spicules. Megascleres only ( Tab. 8; Fig. 11E View FIGURE 11 ): oxeas, smooth, slightly curved or straight, mostly acerate, with pointy or roundish terminations: 112–133.5–158 x 2.4–3.8–7.3 µm.

Distribution. Previously, West Indies ( Jamaica — Hechtel 1965; Barbados, Curaçao, Bonaire — de Weerdt 2000); Venezuela, Florida ( de Weerdt 2000). New record—Costa do Descobrimento (BA, Brazil).

Ecology. The specimen MNRJ 21903 was growing on a Geodia gibberosa Lamarck, 1815 and the specimen MNRJ 22236 was growing next to polychaete tubes, tunicates and algae. Both materials were in sciophilous microhabitat.

Remarks. Our specimens are very similar—in terms of habit, skeleton, spicules and ecology—to the original ( Hechtel, 1965) and subsequent descriptions ( de Weerdt, 2000) of H. (Halich.) albifragilis from the Caribbean. However, we observed that the skeletal architecture in Caribbean counterparts is slightly denser than in our Brazilian specimens. Nevertheless, this is interpreted here as morphological plasticity given the great similarity in other morphological features when Caribbean and Brazilian H. (Halich.) albifragilis are compared.

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