Revision of the subgenus Neopsacas (Hexactinellida, Rossellidae, Crateromorpha) with the description of new species and subspecies Author Menshenina, Larisa L. Author Tabachnick, Konstantin R. Author Janussen, Dorte text Zootaxa 2007 1463 55 68 journal article 10.5281/zenodo.176494 d38bdbd0-29f5-4f33-b8c1-a409d7b60112 1175-5326 176494 Genus: Crateromorpha Gray in Carter, 1872 Subgenus: Crateromorpha (Neopsacas) Tabachnick, 2002 Synonymy Crateromorpha ( Neopsacas ) Tabachnick, 2002 : 1479 . Type species Crateromorpha ( Neopsacas ) variata Tabachnick, 2002 (by primary designation). Differenciated diagnosis Crateromorpha with hypodermal-hypoatrial spicules having spines near the spicule centre. Diagnosis, revised Body is bell-like or ovoid, basiphytous with long peduncle. The choanosomal skeleton is composed chiefly of diactins, rarely tauactins, stauractins and pentactins. The spicules of the peduncle are diactins fused to each other by synapticula. Dermalia and atrialia are similar to each other and contain mostly pentactins and diactins or diactins only. Hypodermalia and hypoatrialia (when present) are mostly pentactins sometimes hexactins with spines near the spicule centre. Microscleres are various in different species: discoidal, spiny spicules with 1-(usually 5)–6 rays; drepanocomes; hexasters and hemihexasters with discoidal, onychoidal and oxyoidal outer ends. Remarks Discovery of new species have led to further overlap of features between Crateromorpha (Neopsacas) and other subgenera of Crateromorpha . Differences in microsclere composition have become less distinctive, and now the most important feature to distinguish Crateromorpha (Neopsacas) from other subgenera is presence of spines situated close to the spicule centre in hypodermal and hypoatrial hexactins. Dermal and atrial spicules are rare in some specimens and do not seem to form continuous layers in Crateromorpha (Neopsacas) .