Clathria (Thalysias) hirsuta Hooper & Levi, 1993

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 : 39

publication ID

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

publication LSID

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

DOI

https://doi.org/10.5281/zenodo.4335460

persistent identifier

https://treatment.plazi.org/id/F52B791A-FFC0-E900-82D3-FD6FC76AF7EA

treatment provided by

Valdenar

scientific name

Clathria (Thalysias) hirsuta Hooper & Levi, 1993
status

 

Clathria (Thalysias) hirsuta Hooper & Levi, 1993 View in CoL

Fig. 21 View Fig

Clathria hirsuta Hooper & Levi, 1993: 1259 View in CoL , figs 19–20.

Material examined

PONTA DO OURO • 1 very small sample covering a hydroid; 26°49′29.579″ S, 32°53′51.072″ E; Blacks; 19.2 m deep; 4 Feb. 2017; Cerrano leg.; PO10 GoogleMaps 1 small fragment; 26°49′16.561″ S, 32°53′52.979″ E; Tea Garden; 19.7 m deep; 6 Mar. 2017; Cerrano leg.; PO78 GoogleMaps .

Description

The sponge is massive ( Fig. 21 View Fig A–B), digitiform and arborescent ( Fig. 21C View Fig ). The exhalant channels converge in numerous, large oscula ( Fig. 21 View Fig A–B). The color may vary from bright orange to vivid red ( Fig. 21 View Fig A–C). Both samples preserved in alcohol changed their color to beige. The surface is verrucose and the consistence is elastic.

SKELETON. The ectosome consists of a layer of small styles. The choanosome is formed by an irregular reticulation from pauci- to multispicular primary fibers, 52–73 µm in section, and secondary unispicular fibers, 24–41 µm. Both are spongin rich and are cored by smooth styles. Echinating acanthostyles are present on the primary fibers ( Fig. 21D View Fig ).

SPICULES. Smooth and straight styles ( Fig. 21E View Fig ), sometimes modified in subtylostyles, 82.5–(93.25, 11.8)– 137.5 µm × 4–(5.2, 0.7)– 6 µm; smooth and slightly curved styles ( Fig. 21F View Fig ), 70–(109.5, 23.4)– 147 µm × 4.5–(5.2, 0.7)– 6.1 µm; straight acanthostyles ( Fig. 21G View Fig ) with sharp spines on the terminal parts, close to the tips and scattered on the head, 40–(56.3, 10.3)– 72 µm; raphidiform toxas ( Fig. 21H View Fig ) slightly curved in the middle, 100–(104.5)– 120 µm ×4.75–(6)– 7.5 µm; palmate chelae ( Fig. 21I View Fig ) 5–7.5 µm.

Remarks

Clathria (Thalysias) hirsuta Hooper & Levi, 1993 was exclusively known from New Caledonia and Australia (Great Barrier Reef); this is the first record in the Indian Ocean. The spicule shape, size and the morphology fit the original description of the species. However, Hooper & Levi (1993) recognized two distinct populations, with some morphological differences, one from Queensland and one from New Caledonia. The morphological characters (especially spicule size) make the specimens, here examined, closer to the population from New Caledonia.

On the specimen PO78 the hydroid Zyzzyzus warreni Calder, 1988 (Class Hydrozoa, Phylum Cnidaria) was detected.

Kingdom

Animalia

Phylum

Porifera

Class

Demospongiae

Order

Poecilosclerida

Family

Microcionidae

Genus

Clathria

Loc

Clathria (Thalysias) hirsuta Hooper & Levi, 1993

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

Clathria hirsuta

Hooper J. N. A. & Levi C. 1993: 1259
1993
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