# Plakortis

Plakortis is a genus of marine sponges in the order Homosclerophorida, first described by Franz Eilhard Schulze in 1880.

## Description

Plakortis sponges are characterised by having:
* inorganic (spicular) skeletal complement
* Skeleton composed mainly of diods, triods, and/or calthrops in one size class
* Lophose diods, triods, or calthrops complement the main skeleton of non-lophose spicules
* no lophose spicules
* diactinal "microscleres" (microrhabs) in some species

## Species

List of accepted species:
* Plakortis albicans Cruz-Barraza & Carballo, 2005
* Plakortis angulospiculatus (Carter, 1879)
* Plakortis badabaluensis Ubare & Mohan, 2016
* Plakortis bergquistae Muricy, 2011
* Plakortis clarionensis Cruz-Barraza, Vega & Carballo, 2014
* Plakortis communis Muricy, 2011
* Plakortis copiosa Pulitzer-Finali, 1993
* Plakortis dariae Ereskovsky, Lavrov & Willenz, 2014
* Plakortis deweerdtaephila Vicente, Zea & Hill, 2016
* Plakortis edwardsi Ereskovsky, Lavrov & Willenz, 2014
* Plakortis erythraena Lévi, 1958
* Plakortis fromontae Muricy, 2011
* Plakortis galapagensis Desqueyroux-Faúndez & van Soest, 1997
* Plakortis halichondrioides (Wilson, 1902)
* Plakortis hooperi Muricy, 2011
* Plakortis insularis Moraes & Muricy, 2003
* Plakortis japonica (Hoshino, 1977)
* Plakortis kenyensis Pulitzer-Finali, 1993
* Plakortis lita de Laubenfels, 1954
* Plakortis mesophotica Idan, Shefer, Feldstein & Ilan, 2021
* Plakortis microrhabdifera Moraes & Muricy, 2003
* Plakortis myrae Ereskovsky, Lavrov & Willenz, 2014
* Plakortis nigra Lévi, 1953
* Plakortis petrupaulensis Domingos, Moraes & Muricy, 2013
* Plakortis potiguarensis Domingos, Moraes & Muricy, 2013
* Plakortis pulvillus Samaai, Pillay & Janson, 2019
* Plakortis quasiamphiaster Díaz & van Soest, 1994
* Plakortis ruetzleri Lage, Muricy, Ruiz & Pérez, 2018
* Plakortis simplex Schulze, 1880
* Plakortis spinalis Domingos, Moraes & Muricy, 2013
* Plakortis symbiotica Vicente, Zea & Hill, 2016
* Plakortis zyggompha (de Laubenfels, 1934)

## Literature
### Chemical and medecinal properties

* Paul Ralifo; Laura Sanchez; Nadine C Gassner; Karen Tenney; R Scott Lokey; Theodore R Holman; Frederick A Valeriote; Phillip Crews (1 January 2007). "Pyrroloacridine alkaloids from Plakortis quasiamphiaster: structures and bioactivity". Journal of Natural Products. 70 (1): 95–99. doi:10.1021/NP060585W. ISSN 0163-3864. PMC 1839848. PMID 17253856. Wikidata Q42875300.
* Sridevi Ankisetty; Deborah J. Gochfeld; M. Cristina Diaz; Shabana I. Khan; Marc Slattery (25 August 2010). "Chemical constituents of the deep reef caribbean sponges Plakortis angulospiculatus and Plakortis halichondrioides and their anti-inflammatory activities". Journal of Natural Products. 73 (9): 1494–1498. doi:10.1021/NP100233D. ISSN 0163-3864. PMID 20738102. Wikidata Q84803121.
* Florecita S. De Guzman; Francis J. Schmitz (July 1990). "Peroxy Aliphatic Esters from the Sponge Plakortis lita". Journal of Natural Products. 53 (4): 926–931. doi:10.1021/NP50070A021. ISSN 0163-3864. Wikidata Q104397018.
* Braekman JC; Daloze D; De Groote S; Fernandes JB; Van Soest RW (3 July 1998). "New polyketides from the sponge Plakortis sp". Journal of Natural Products. 61 (8): 1038–1042. doi:10.1021/NP980096Z. ISSN 0163-3864. PMID 9722495. Wikidata Q77171802.
* A Rudi; Y Kashman (October 1993). "Three new cytotoxic metabolites from the marine sponge Plakortis halichondrioides". Journal of Natural Products. 56 (10): 1827–1830. doi:10.1021/NP50100A027. ISSN 0163-3864. PMID 8277322. Wikidata Q72696133.