Halisarca Johnston, 1842

Willenz, Philippe, Ereskovsky, Alexander V. & Lavrov, Dennis V., 2016, Integrative taxonomic re-description of Halisarca magellanica and description of a new species of Halisarca (Porifera, Demospongiae) from Chilean Patagonia, Zootaxa 4208 (6), pp. 501-533 : 503

Genus Halisarca Johnston, 1842

Diagnosis. Chondrillida in which the choanocyte chambers are tubular, branched and wide mouthed. Larvae are incubated disphaerulae (a larval form found only in Halisarca ) with simple undifferentiated histology and cilia of uniform length. Skeleton is composed of fibrillar collagen only, there are no fibrous or mineral elements present; ectosomal and subectosomal collagen is highly organised and structurally diversified ( Ereskovsky et al. 2011).