Clathria (Clathria) priestleyae Goodwin, Berman, and Hendry 2019
- Dataset
- Demosponges from the sublittoral and shallow-circalittoral (<24 m depth) Antarctic Peninsula with a description of four new species and notes on in situ identification characteristics
- Rank
- SPECIES
- Published in
- Goodwin, Claire E., Berman, Jade, Hendry, Katharine R. (2019): Demosponges from the sublittoral and shallow-circalittoral (<24 m depth) Antarctic Peninsula with a description of four new species and notes on in situ identification characteristics. Zootaxa 4658 (3): 461-508, DOI: 10.11646/zootaxa.4658.3.3
Classification
- kingdom
- Animalia
- phylum
- Porifera
- class
- Demospongiae
- order
- Poecilosclerida
- family
- Microcionidae
- genus
- Clathria
- species
- Clathria priestleyae
description
(Figure 14) lsid: zoobank. org: act: 7 FE 528 FB- 040 A- 4 C 14 - 9 A 73 - A 4695 DF 0 E 64 B
materials_examined
Distribution. Currently only known from the type and holotype localities.
materials_examined
Specimens. Holotype: BELUM. Mc 2015.638 Rocks near San Martin Islands (65 ° 41.297 ’ S, 65 ° 20.091 ’ W), depth 6 – 21 m; collected by C. Goodwin and E. Priestley, 17 / 02 / 2015. Paratypes: BELUM. Mc 2015.692, BELUM. Mc 2015.703 and BELUM. Mc 2015.713 Vieugue Island (65 ° 38.758 ’ S, 65 ° 12.540 ’ W), depth 10 – 22 m; collected by C. Goodwin and E. Priestley, 23 / 02 / 2015; BELUM. Mc 2015.721 Port Charcot, Booth Island (65 ° 03.853 ’ S, 64 ° 01.868 ’ W), depth 6 – 16 m; collected by C. Goodwin and E. Priestley, 23 / 02 / 2015. BELUM. Mc 2015.758 Paradise Bay Wall (64 ° 53.841 ’ S, 62 ° 52.391 ’ W), depth 14 – 21 m; collected by C. Goodwin and E. Priestley, 24 / 02 / 2015. and BELUM. Mc 2015.775 Paradise Bay Wall (64 ° 53.841 ’ S, 62 ° 52.391 ’ W), depth 10 – 24 m; collected by C. Goodwin and E. Priestley, 25 / 02 / 2015. Comparative material examined. Clathria pauper Brondstedt, 1927. BMNH 30.11.5.2 a (tissue section and spicule preparation). Labelled ‘ N of Discovery Islet from type’. Etymology. Named after Emily Priestley who was an invaluable member of the expedition dive team. External morphology. In situ appearance (Figure 14 A): Pale yellow encrusting sponge forming patches of variable size (5 –> 20 cm) on bedrock. Surface covered with spiky projections up to 2 cm in length, these are sometimes branched. The projections are cored by fibres of spicules which are visible through the projection as a central core. Preserved appearance. Fairly soft brown basal cushion with projecting, tapering spikes, up to 1 cm in length. Surface velvety, finely hispid. Skeleton (Figure 14 B): In the basal cushion the choanosomal skeleton is an irregular plumo-reticulation of thick ascending fibres of primary styles (up to 20 spicules thick) which are echinated by the acanthostyles, joined by thinner secondary tracts cored by 2 – 3 primary styles. In the spiky surface projections, a thick ascending fibre of principal styles (up to 20 spicules thick) cores the centre of the projection. Thinner fibres of 2 – 3 principal styles, heavily echinated by acanthostyles, lead up to the surface at 45 ° angle to the central fibre. Brushes of sub-ectosomal styles join these at the surface. Microscleres are scattered throughout the tissue. Spicules: Measurements from BELUM. Mc 2015.638. Principal styles (Figure 14 C): 430 (802) 1105 by 14 (19) 25 µm. Large smooth styles which are often slightly curved. Subectosomal styles (Figure 14 D, E): 297 (375) 440 by 7 (9) 11 µm. Tylote head which is spined with a few large spines. Acanthostyles (Figure 14 F): 121 (146) 168 by 8 (11) 21 µm. Entirely spined with fairly large spines. Thin toxas (Figure 14 G): 154 (176) 213 µm. Oxhorn toxas (Figure 14 H): 54 (69) 103 µm. Remarks. We have assigned this species to Clathria (Clathria) rather than one of the other seven subgenera on the basis of the lack of differentiation between the axial and extra-axial regions of the choanosome and the presence of a reticulate skeleton, and only a single category of auxillary styles (Hooper 2002 b). Although the species has an appearance similar to C. (Axosuberites) rosita Goodwin, Brewin & Brickle, 2012 this subgenus has a distinctive extra-axial skeleton and lacks echinating megascleres (Hooper, 2002 b). Of the 29 species present in the Antarctic and adjacent regions only two, C. (C.) lissosclera Bergquist & Fromont, 1988 and C. (C.) pauper Brøndsted, 1927, possess two distinct categories of toxa.