Radiospongilla cf. cerebellata (Bowerbank, 1863)

Ruengsawang, Nisit, Sangpradub, Narumon, Cubeddu, Tiziana, Erpenbeck, Dirk, Wörheide, Gert, Pronzato, Roberto & Manconi, Renata, 2025, Bangkok urban census of aquatic invertebrate fauna by an integrative taxonomic approach: the case of Suan Luang Rama IX Park and its freshwater sponges (Spongillida: Spongillidae), Zootaxa 5660 (3), pp. 371-388 : 374-375

Radiospongilla cf. cerebellata

Figures 1–8

Diagnosis

Gemmular theca subspherical, partly adhering to the basal body spongin plate and armed by 2 layers of tangential and radial gemmuloscleres (strongyles to strongyloxeas). Outer layer of gemmular theca with honeycombed surface and armed by tangential gemmuloscleres. Pneumatic layer thick, continuous, variably arranged in the same theca as (a) polygonally chambered only towards the outer layer, (b) extensively lamellar to (c) filamentous network near inner layer, and armed by scattered, not abundant, irregularly radial gemmuloscleres. Inner layer well developed, smooth, compact, multilayered. Skeletal megascleres long, smooth oxeas with tapered tips to less frequent stout, smooth, oxeas with abruptly pointed tips. False microscleres, very similar to gemmuloscleres, rare, scattered, tangential, short spiny strongyles to strongyloxeas in the dermal membrane. Gemmuloscleres strongyles to strongyloxeas with spines and hooks.

Material examined

THAILAND — Bangkok • 1 specimen CNR-POR-FW 311; Suan Luang Rama IX Park; 13°41′23″ N, 100°39′45″ E; 27 Jan. 2024; N. Ruengsawang leg.; in greenhouse pond of the Botanical Garden ; • 1 spec. CNR-POR-FW 310; Suan Luang Rama IX Park; 13°41′23″ N, 100°39′46″ E; 27 Jan. 2024; R. Manconi leg.; in greenhouse pond of the Botanical Garden ; • 1 spec. CNR-POR-FW 312; Suan Luang Rama IX Park; 13°41′27″ N, 100°39′39″ E; 27 Jan. 2024; R. Manconi leg.; in terracotta pots scattered in the Lotus and Water Lily Garden .