Amphimedon brevispiculifera ( Dendy, 1905 )

Calcinai, Barbara, Belfiore, Giuseppe, Pica, Daniela, Torsani, Fabrizio, Palma, Marco & Cerrano, Carlo, 2020, Porifera from Ponta do Ouro (Mozambique), European Journal of Taxonomy 698, pp. 1-56: 16-17

publication ID

https://doi.org/10.5852/ejt.2020.698

publication LSID

lsid:zoobank.org:pub:623BBCE3-12A5-45A9-802A-2ED2E15164A3

DOI

http://doi.org/10.5281/zenodo.4335428

persistent identifier

http://treatment.plazi.org/id/F52B791A-FFE9-E936-8132-FEC0C267F3C1

treatment provided by

Valdenar

scientific name

Amphimedon brevispiculifera ( Dendy, 1905 )
status

 

Amphimedon brevispiculifera ( Dendy, 1905)  

Fig. 9 View Fig

Pachychalina brevispiculifera Dendy, 1905: 149   , pl 10 fig. 7.

Material examined

PONTA DO OURO • 2 branches, about 4 cm long, alcohol preserved; 26°49′55.65″ S, 32°53′13.417″ E; Three Sisters; 23.9 m deep; 21 Feb. 2017; Cerrano leg.; PO65 GoogleMaps   .

Description

The live sponge is arborescent, with flattened branches often anastomosing ( Fig. 9A View Fig ); oscules are numerous and concentrated on the upper margin of the branches ( Fig. 9A View Fig ). Light purple in vivo, the specimen conserved in alcohol is pale yellow; the surface is smooth, the consistence is firm and elastic. The preserved sample consists of two small fragments; the biggest being a small branch about 4 cm long and 1.5 cm thick.

SKELETON. Ectosome ( Fig. 9B View Fig ) formed by multispicular fibers, rich in spongin, with the diameter ranging between 20 and 75 μm, creating irregular, rounded meshes of 100–200 μm. Echinating spicules, at the end of the choanosomal primary fibers, protrude at the nodes. Choanosome ( Fig. 9C View Fig ) consists of multispicular primary fibers as well as multispicular secondary fibers, of about the same thickness (20–90 μm in diameter), forming rectangular meshes (average of 100 ×175 μm).

SPICULES. Short, stout and sharp oxeas, 80–(88.5, 4.4)–95×2.5–(2.75, 1.3)–3 μm ( Fig. 9D View Fig ).

Remarks

Out of 57 species of the genus Amphimedon   , 30 are recorded in the Indo-Pacific Ocean ( Van Soest et al. 2019). The examined specimen fits with A. brevispiculifera   described from the Gulf of Manaar. They share the same general morphology, disposition of the oscules and the short dimension of the spicules (100 × 5.5 μm); the species name “ brevispiculifera   ” means ‘with short spicules’. All the other species of Amphimedon   in the Indo-Pacific Ocean are characterized by longer oxeas.

The present specimen is apparently morphologically similar to the sponge recently recorded by Samaai et al. (2019) in South Africa and named Callyspongia (Cladochalina) diffusa sensu Samaai et al. (2019)   .

This species was previously known only from South India and Sri Lanka ( Laccadive Sea); thus, it is the first record since its original description and a new record for the studied area.

Kingdom

Animalia

Phylum

Porifera

Class

Demospongiae

Order

Haplosclerida

Family

Niphatidae

Genus

Amphimedon

Loc

Amphimedon brevispiculifera ( Dendy, 1905 )

Calcinai, Barbara, Belfiore, Giuseppe, Pica, Daniela, Torsani, Fabrizio, Palma, Marco & Cerrano, Carlo 2020
2020
Loc

Pachychalina brevispiculifera

Dendy A. 1905: 149
1905