Aplysina orthoreticulata, Pinheiro, Ulisses Dos S., Hajdu, Eduardo & Custódio, Márcio R., 2007

Pinheiro, Ulisses Dos S., Hajdu, Eduardo & Custódio, Márcio R., 2007, Aplysina Nardo (Porifera, Verongida, Aplysinidae) from the Brazilian coast with description of eight new species, Zootaxa 1609, pp. 1-51 : 39-41

publication ID

https://doi.org/ 10.5281/zenodo.178878

DOI

https://doi.org/10.5281/zenodo.6240811

persistent identifier

https://treatment.plazi.org/id/03E387FE-FFE2-FFC8-E3B5-FCB6FD43BDE3

treatment provided by

Plazi

scientific name

Aplysina orthoreticulata
status

sp. nov.

Aplysina orthoreticulata sp.n. ( Figs. 21 View FIGURE 21 , 22 View FIGURE 22 A)

Holotype: MNRJ 4651 (BA, 16º07'30'' S - 38º10'52'' W), 40 m depth, Programme REVIZEE Central V coll., 30/VI/2001.

Diagnosis: This is the only digitiform Aplysina with a surface covered by shallow depressions and having a skeleton made of an orthogonal reticulation of stout spongin fibres. The colour is beige with purple spots in vivo, turning into purple when preserved in ethanol.

Description

The specimen is a digitiform projection, 16 cm long and 1 cm in diameter ( Fig. 21A View FIGURE 21 ), covered by shallow irregular depressions. It possesses many small oscula (0.1 cm across) restricted to the sides of the sponge. The diameter of the projections is mostly regular, with the exception of a constriction in the upper portion that reduces the sponge diameter to 0.5 cm. Fibers are observed projecting themselves perpendicularly from the surface of the sponge. The colour is beige with purple spots in vivo, turning completely purple when preserved in ethanol. Consistency very hard, incompressible.

Skeleton: Choanosome with an orthogonal reticulation of spongin fibers, resulting in small meshes (average 550 Μm) in which the fibers are organized perpendicularly to each other ( Fig. 21B View FIGURE 21 ). The fibers possess a laminated bark with reddish colour and thickness of 100–307 Μm (average 184 Μm) and fine black or reddish pith, with thickness between 10 and 40 Μm (average 22 Μm; Fig. 21C View FIGURE 21 ).

Bathymetry: The only specimen was dredged at 40 m depth.

Distribution: Provisionally known only from the type locality off the State of Bahia ( Brazil; Fig. 22 View FIGURE 22 A). Etymology: The specific name orthoreticulata is derived from the new species’ orthogonal reticulation. Remarks: Aplysina orthoreticulata sp.n. presents a superficial resemblance to A. cauliformis (cf. above), both comprising digitiform branches of regular diameter. However, none of the currently recognized morphotypes of the latter (see above) possess their surface excavated by shallow depressions and the orthogonal reticulation, which is unique within the genus.

MNRJ

Museu Nacional/Universidade Federal de Rio de Janeiro

Kingdom

Animalia

Phylum

Porifera

Class

Demospongiae

Order

Verongida

Family

Aplysinidae

Genus

Aplysina

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