Arthuria darwinii ( Haeckel, 1870 ), 2015

Van Soest, Rob W. M. & De Voogd, Nicole J., 2015, Calcareous sponges of Indonesia, Zootaxa 3951 (1), pp. 1-105 : 97-98

Arthuria darwinii ( Haeckel, 1870) comb. nov.

Leucosolenia darwinii Haeckel, 1870: 243 ;

Ascaltis darwinii ( Haeckel, 1872) (II) : 57, (III) pl.9 fig. 4, pl. 10 figs 3a–c

( Olynthus, Cistolynthus , Soleniscus, Nardorus, Tarrus, Auloplegma, Ascometra , Ascetta , Ascilla darwinii ( Haeckel, 1872) (II) : 57–58.

Ascaltis erasmi Haeckel, 1872 (II): 58.

Ascaltis caroli Haeckel, 1872 (II): 58.

Ascaltis darwinii var. erasmi Haeckel, 1872 (II): 58.

Ascaltis darwinii var. caroli Haeckel, 1872 (II): 58.

Description (summarized from Haeckel, 1972 (II): 57): Apparently a variable network of partially upright tubes ending in small oscules, together forming an encrustation on algal fronds. Size of cormus up to 30 mm in lateral expansion. Skeleton and spicules: the walls of the tubes consist of a single layer of spicules. Tri- and tetractines are similar in shape, equiangular equiactinal, 80–100 x 10–12 µm, with apical actines of the tetractines often curved upwards.

Type locality: Java (collected by Mulder); also reported by Haeckel from Sri Lanka (collected by Wright) and the Red Sea (collected by Frauenfeld).