Halicnemia geniculata
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Ordo: Halichondrida
Familia: Eteroxyidae
Genus: Halicnemia
Name
Halicnemia geniculata Sarà, 1958 – Wikispecies link – Pensoft Profile
- Halicnemia geniculata Sarà, 1958: 237.
Material examined
Specimen IG-F-BL4-sp1-sciaf.; alcohol preserved, Gallinara Island (station 2, Falconara) 44°01'22"N, 8°13'34"E, depth 35 m, collected on 17-06-2009. The specimen was entirely used for spicule preparations.
Description
Small and thin, yellow-ochre encrustation (1 cm2) on a coralligenous block.
Skeleton. Not observed.
Spicules. Long tylostyles, 405 (1351.7) 1976 × 1.5 (2.7) 4 μm, generally straight, with terminal or subterminal swellings variable in shape; irregular and polytylote forms are to be found (Fig. 13A). Rabdhotylostyles with heads as above, 147(242)705 × 1.5 (2.7) 4 μm (Fig. 13B); oxeas long, sinuous and thin, 460 (757) 1118 × 1.5 (2.5) 5 mm (Fig. 13C); acanthoxeas slightly curved or bent, uniformly spined, 42.5 (51.8) 62.5 × 1.5 (1.8) 2 μm (Fig. 13D).
Distribution and discussion
This species, originally described from a superficial cave of the Gulf of Naples (Sarà 1958[1]) was recorded at 60–70 m depth in the same area (Sarà and Siribelli 1962[2]) and in caves close to Marseille (Pouliquen 1972[3]). It is a Mediterranean endemic species (Pansini and Longo 2008[4]) and a new finding for the Ligurian Sea and the coralligenous community.
Taxon Treatment
- Bertolino, M; Cerrano, C; Bavestrello, G; Carella, M; Pansini, M; Calcinai, B; 2013: Diversity of Porifera in the Mediterranean coralligenous accretions, with description of a new species ZooKeys, 336: 1-37. doi
Other References
- ↑ Sarà M (1958) Studio sui Poriferi di una grotta di marea del Golfo di Napoli. Archivio Zoologico Italiano 43: 203-281.
- ↑ Sarà M, Siribelli L (1962) La fauna di Poriferi delle ‘secche’ del golfo di Napoli. II. La secca di Benda Palummo. Annuario dell’Istituto e Museo di Zoologia dell’Università di Napoli 14(2): 1-62.
- ↑ Pouliquen L (1972) Les spongiaires des grottes sous-marines de la région de Marseille: Ecologie et systématique. Téthys 3(4): 717-758.
- ↑ Pansini M, Longo C (2008) Porifera. In: Relini G (Ed) Checklist della flora e della fauna dei mari italiani. Ministero dell’Ambiente e tutela del territorio, Roma. Biologia Marina Mediterranea 15(1): 42-66.
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