dcsimg

Description

provided by Zookeys
Holotype ZMB 3204 encrusting, size 5 × 2.5 cm and thickness 1–5 mm (as described by Thiele, now very small fragment), white after preservation in alcohol. The majority of the reviewed material is encrusting with a thickness of 4-10mm, but branching specimens also occur. External morphology follows the description of the genus. Color of the ectosome can be red, orange, brown orange, dark brown, chocolate brown, milk coffee brown, cream, or white (Fig. 1, 2). Color of choanosome is pale beige. After preservation in ethanol color is similar to live specimens, but lighter shade. Spicules. Holotype ZMB 3204 (Fig. 6) Megascleres large straight tylostyles with blunt/rounded point 355-672-940 × 7.5-12-17.5 × 7.5-16-20 μm, small straight tylostyles with sharp point 165-226-275 × 2.5-6-7.5 × 2.5-8-10 μm; microscleres selenasters 55-70-75 × 42.5-55-72.5 μm, spherasters (abundant) 20-25-30 μm, streptasters typically with well developed axis and with 4-9 rays with hastate tips, rays are smooth or can be spined, but do not have bifurcations of the tips 15-24-32.5 × 2.5-8-12.5 μm; acanthose microrhabs with straight or zig-zag axis 5-7-10 × <2.5 μ m.The range within the examined material (Table 1): large tylostyles 460-1250 × 8-23 × 10-25 μ m, small tylostyles 120-430 × 3-15 × 2-15 μ m, selenasters 50-85 × 22-73 μ m, spherasters 13-30 μ m, streptasters 15-35 × 2-15 μ m, rays 5-18 × 1-2.5 μ m. Skeleton. As description of genus with addition that microrhabds form a layer over and amidst the selenaster cortex and are also prevalent in choanosomal tissue. Streptasters scattered in choanosome. Spherasters amidst selenasters in cortex and scattered in choanosome.
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copyright
Leontine E. Becking
bibliographic citation
Becking L (2013) Revision of the genus Placospongia (Porifera, Demospongiae, Hadromerida, Placospongiidae) in the Indo-West Pacific ZooKeys 298: 39–76
author
Leontine E. Becking
original
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Distribution

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East African coast to eastern Indonesia (Fig. 9, Table 4). Possibly further east to Central Pacific. Pulitzer-Finali (1993) identified a ‘P. carinata’ from East Africa (Mombasa) that fits the description of Placospongia mixta based on the length of the tylostyles (up to 1200 μ m) and the presence of spherasters, but no Placospongia mixta specimens were observed in the Seychelles material deposited at ZMA.
license
cc-by-3.0
copyright
Leontine E. Becking
bibliographic citation
Becking L (2013) Revision of the genus Placospongia (Porifera, Demospongiae, Hadromerida, Placospongiidae) in the Indo-West Pacific ZooKeys 298: 39–76
author
Leontine E. Becking
original
visit source
partner site
Zookeys