Genus Plakortis Schulze, 1880

Museums

Regional Maps

• Plakortis Schulze, F.E. 1880. Untersuchungen über den Bau und die Entwicklung der Spongien. Neunte Mittheilung. Die Plakiniden. Zeitschrift für Wissenschaftliche Zoologie 34: 407-451 pls 20-22.

  Type species:

   Plakortis simplex Schulze, 1880 by monotypy.

Distribution

IBRA and IMCRA regions

IMCRA

Northeast Transition (19), Timor Province (2), Northwest Shelf Transition (26), Southwest Shelf Transition (30), Central Eastern Shelf Transition (39), Northeast Shelf Province (40), Northeast Shelf Transition (41)

Diagnosis

Thinly to massively encrusting plakinids with a skeleton mainly formed by small (50–200µm) diods with triods in varying abundance. Deformed calthrops can be found in some specimens. Some species have microrhabds (5–20µm) distributed regularly in the sponge body. Aquiferous system intermediate between sylleibid-like and leuconoid, with eurypylous choanocyte chambers regularly distributed around exhalant canals. Both ectosomal inhalant cavities and basal exhalant cavities are usually present. Skeleton confused, dense, without ectosomal specialization or differential location of spicules.

ID Keys

Refer to family Plakinidae diagnosis

Diagnosis References

Muricy, G. 2011. Diversity of Indo-Australian Plakortis (Demospongiae: Plakinidae), with description of four new species. Journal of the Marine Biological Association of the United Kingdom 91(2): 303–319 [Date published 2011: dated 2010] [303]

Muricy, G. & Diaz, M. C. 2002. Order Homosclerophorida Dendy, 1905. Family Plakinidae Schulze, 1880. pp. 71-82 in Hooper, J.N.A. & van Soest, R.W.M. (eds). Systema Porifera: A guide to the classification of sponges. New York : Kluwer Academic/Plenum Publishers Vol. 1. [81]

History of changes