Genus Holascus Schulze, 1886
- Holascus Schulze, F.E. 1886. Ueber den Bau und des System der Hexactinelliden. Abhandlungen der Königlich-Preussischen Akademie der Wissenschaften. Berlin 1886: 1-97 [39].
Type species:
Holascus stellatus Schulze, 1887 by subsequent designation, see Hooper, J.N.A. in Hooper, J.N.A. & Wiedenmayer, F. 1994. Porifera. pp. 1-620 in Wells, A. (ed.). Zoological Catalogue of Australia. Melbourne : CSIRO Australia Vol. 12 xiii 624 pp. [Date published 21/Nov/1994] (on basis that Holascus stellatus Schulze, F.E. 1887. Report on the Hexactinellida collected by H.M.S. Challenger during the years 1873–8176. Rep. Sci. Results Voyage Challenger. Zool. 21(53): 1–514 pls 1–104 1 map [86] was the first named species in the genus).
Distribution
States
South Australia, Tasmania
Extra Distribution Information
SW Atlantic, Southern Ocean, Indian Ocean, Indo-Malayan region, NE and E Pacific.
IMCRA
Tasmania Province (10), West Tasmania Transition (9)
Distribution References
Diagnosis
Body is tubular, lophophytose, with thin walls and a tuft of anchor-like basalia. Sieve-plate was observed in several species. Basalia are anchor-like spicules. Choanosomal spicules are hexactines, pentactines, stauractines and tauactines with different predomination in different species. Additional choanosomal spicules are short-rayed diactines and other short-rayed derivatives of hexactines. Dermalia and atrialia are usually pinular hexactines, rarely atrialia could be of pentactines. Microscleres are various combinations of hexasters, hemihexasters, hexactines, triactines and diactines, discohexasters, hemidiscohexasters, discohexactines, onychohexasters, hemionichohexasters, onycho-hexactines, graphiocomes, drepanocomes and tylohexasters.
ID Keys
See Subfamily Euplectellinae Diagnosis.
Diagnosis References
Tabachnick, K. 2002. Family Euplectellidae Gray, 1867. pp. 1388-1434 in Hooper, J.N.A. & Soest, R.W.M. Van (eds). Systema Porifera. A guide to the classification of sponges. New York : Kluwer Academic/Plenum Publishers Vol. 2. [1396]
History of changes
| Published | As part of group | Action Date | Action Type | Compiler(s) |
|---|---|---|---|---|
| 29-Mar-2018 | 28-Feb-2012 | MODIFIED | ||
| 29-Mar-2018 | 15-Apr-2011 | MODIFIED | ||
| 12-Feb-2010 | (import) |