Chondropsis subtilis Calcinai, Bavestrello, Bertolino, Pica, Wagner & Cerrano, 2013, n. sp.

• Main Authors: Calcinai, Barbara, Bavestrello, Giorgio, Bertolino, Marco, Pica, Daniela, Wagner, Daniel, Cerrano, Carlo
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2013
• Subjects: Biodiversity; Taxonomy; Animalia; Porifera; Demospongiae; Poecilosclerida; Chondropsidae; Chondropsis; Chondropsis subtilis; Pink salmon
• Online Access: https://doi.org/10.5281/zenodo.6156063; http://treatment.plazi.org/id/03B7DE6C8A24F87AFF38C365FB23C4AB

Chondropsis subtilis n. sp. (Fig. 6 A–H) (Tab. 3) Holotype material. MSNG 56260: sample Bugor 504: Indonesia, North Sulawesi, Manado Tua Island, Negeri, 15 m, September 2007. Paratype material. MSNG 56261: sample Siladen Village: Indonesia, North Sulawesi, Siladen Island, 10 m, October 2008. Comparative material: Chondropsis wilsoni Dendy, 1895 holotype material BMNH, 1902.10.18.155-156-157 (three slides). Diagnosis. Chondropsis subtilis is characterised by a surface that is covered by a reticulated pattern of fine sand, a main skeleton of longitudinal, ascending tracts of sand, strongyles and foreign spicules embedded in spongin; spicules are thin strongyles (2 µm) as megascleres and small sigmas as microscleres. Description. The sponge (holotype) encrusts a colony of Carijoa riisei as a pellicle up to 0.5 mm thick (Fig. 6 A, B), leaving only the polyp openings free. The holotype occurs on several branches of the coral, up to 14 cm long (Fig. 6 C). The paratype occurs on several inter-crossing branches of C. riisei covered by numerous other epibionts (bryozoans, vermetids, foraminifera). Consistency soft and compressible. Surface microconulose due to protruding choanosomal bundles; in some portions of the sponge surface sand and spicules create a fine network (Fig. 6 D). In the paratype the surface is collapsed, the conules are more prominent and the sponge surface is strongly shaggy. The colour is pink salmon in situ (Fig. 6 A, B), whitish in ethanol (Fig. 6 C). Skeleton. Ectosomal skeleton of scattered, tangential strongyles, sand and abundant foreign spicules. A regular network of polygonal to circular meshes, about 100 µm in diameter, is evident on the sponge surface (Fig. 6 D); in some parts of the sponge, the surface consists of an homogeneous layer of sand, foreign spicules and strongyles (Fig. 6 E) and the regular pattern of sand is not evident. Choanosomal skeleton of longitudinal, ascending tracts of spongin (70–125 µm in diameter), embedded sand grains, strongyles and foreign spicules connected by ...