Anamixilla torresi Polejaeff 1883
Creators: name: Van Soest, Rob W. M.
name: De Voogd, Nicole J.
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Porifera
Calcarea
Leucosolenida
Jenkinidae
Anamixilla
Anamixilla torresi

description: Anamixilla torresi Poléjaeff, 1883
Figures 51a–c, 52a–c
Anamixilla torresi Poléjaeff, 1883: 50, pl. IV figs 2a–c; Dendy, 1893a: 97; Burton, 1930: 5, fig. 4; Borojevic, 1967b: 9; Erhardt & Baensch, 1998: 73.
Material examined. ZMA Por. 00139, Indonesia, Irian Jaya, 1.71°S 130.79°E, depth 32 m, trawled, coll. Siboga Expedition stat. 164, 20 August 1899; ZMA Por. 00140, Indonesia, Nusa Tenggara, Timor, Samau Island, Haingsisi, 10.1358°S 123.6297°E, depth 0–38 m, trawled, coll. Siboga Expedition stat. 303, 2 February 1900; ZMA Por. 00141, Indonesia, Maluku, Banda anchorage, 4.5398°S 129.9084°E, depth 9–45 m, trawled, coll. Siboga Expedition stat. 240, 22 November 1899; ZMA Por. 00142, Indonesia, Ambon anchorage, 3.7°S 128.15°E, depth 40 m, trawled, coll. Siboga Expedition stat. 231, 14 November 1899; ZMA Por. 08006, Indonesia, Nusa Tenggara, E of Komodo, Teluk Slawi, 8.8°S 119.52°E, underneath coral head, depth 1–4 m, snorkeling, coll. R. W.M. van Soest, Indonesian-Dutch Snellius II Expedition stat. 069/II/13, 17 September 1984; ZMA Por. 16351, Indonesia, North Sulawesi, Bunaken Island, in cave, 1.6132°N 124.7797°E, depth 32 m, SCUBA, coll. H. Erhardt, 17 September 1996; RMNH Por. 6572, Indonesia, North Sulawesi, Lembeh Strait, Teluk Makawide, 1.48°N 125.24°E, depth 12 m, SCUBA, coll. N.J. de Voogd, #LEM19/090212/062, 9 February 2012; RMNH Por. 6612, Indonesia, North Sulawesi, Lembeh Strait, Tanjung Pandea, 1.4°N 125.17°E, depth 14 m, SCUBA, coll. N.J. de Voogd, #LEM24/110212/126, 11 February 2012.
Description. Wide irregular-shaped tubes (Fig. 51a) of up to 2.5 cm diameter and with short fringe at the rim of flaring, trumpet-like tube-endings. Overall size of cormus up to 10 cm or more in length. Color white, with blueish fringe in larger tubes. Consistency brittle, but limp when taken out of the water.
Histology. Syconoid aquiferous system.
Skeleton. Inarticulate, with a cortex formed by tangential giant and medium sized triactines (Fig. 51b), a choanosomal skeleton (Fig. 51c) formed by similar giant triactines and the unpaired actines of subatrial triactines. Atrial skeleton (Fig. 51c) consists of tetractines.
Spicules. (Figs 52a–c) Giant triactines, medium sized triactines, small triactines, medium sized and small tetractines; these spicules are all parasagittal. There are also - mostly broken - trichoxeas, uncommon, which likely represent spicules from the tubar fringe.
Giant triactines (Fig. 52a), equiangular with unequal length actines (parasagittal), 990– 164 0–2010 x 66– 84.2 – 120 µm.
Medium-sized triactines (Fig. 52b) with unequal length actines (parasagittal), usually with an unpaired actine longer than both unequal length paired actines, 330– 471.3 –602 x 13– 24.7 –35 µm.
Tetractines (Fig. 52c), with unpaired actines usually shorter than the paired actines, in a large size range from giant-sized to small, 30– 394.1 –690 x 2– 16.6 –24 µm, paired actines 50– 590.6 –900 x 2– 16.1 –20 µm, apical actines approximately 31–53.8–90 x 7– 11.3 –19 µm.
Trichoxeas, in bundles or loose, mostly broken, up to at least 300 x 2.5 µm (only observed in RMNH Por. 6572).
Ecology. Mostly in the deeper reef environment, 20–40 m.
Distribution. Indonesia, elsewhere North Australia and New Caledonia.
Remarks. This material generally conforms closely to Poléjaeff's description, and to brief characterizations of Burton and Borojevic. The species is apparently not uncommon.
description: Published as part of Van Soest, Rob W. M. & De Voogd, Nicole J., 2015, Calcareous sponges of Indonesia, pp. 1-105 in Zootaxa 3951 (1) on pages 72-74, DOI: 10.11646/zootaxa.3951.1.1, http://zenodo.org/record/14950882