Poraniomorpha Danielssen and Koren 1881

Mah, Christopher L., 2023, New occurrence of Poraniidae (Valvatacea, Asteroidea) in Australia with a new genus and species from deep-sea settings, Memoirs of Museum Victoria 82, pp. 119-131 : 125

publication ID

https://doi.org/ 10.24199/j.mmv.2023.82.06

publication LSID

urn:lsid:zoobank.org:pub:B48A3062-C822-4DD1-ADCC-A577C9D2CD32

DOI

https://doi.org/10.5281/zenodo.12214634

persistent identifier

https://treatment.plazi.org/id/03E33A5A-FFE0-1366-FCF8-FD8DFC63F91B

treatment provided by

Felipe

scientific name

Poraniomorpha Danielssen and Koren 1881
status

 

Poraniomorpha Danielssen and Koren 1881 View in CoL

Poraniomorpha Danielssen and Koren 1881: 189 View in CoL .—1884: 67– 70.— Verrill 1895: 139.— Grieg 1907: 41–42.— Fisher 1911: 248 (in key).—1919: 407.— Koehler 1924: 157.— Mortensen 1927: 92.— Gallo 1937: 1664–1667.— Djakonov 1950: 58–59 (1968: 48–49).— Spencer and Wright 1966: U70.— Clark 1984: 33–41.— Clark and Downey 1992: 212.— Mah and Foltz 2014: 350 View Cited Treatment .

Rhegaster Sladen 1883: 155 View in CoL .— 1889: 367.— Bell 1893: 80.— Verrill 1914: 17.

Lasiaster Sladen, 1889: 371–372 View in CoL .— Bell 1893: 81.— Verrill 1899: 198.

Diagnostic comments. The diagnosis herein follows Mah and Foltz (2014), who recognised Poraniomorpha View in CoL as a separate genus from Culcitopsis View in CoL , disagreeing with Clark and Downey (1992), who argued that Culcitopsis View in CoL was a subgenus of Poraniomorpha View in CoL . This includes taxa with polygonal, imbricate, fenestrate plates and a solid abactinal skeleton as separate from species within Culcitopsis View in CoL , which demonstrate strongly expressed fleshy tissue as part of their body wall.

Diagnosis. Body shape ranges from pentagonal to strongly stellate (R/r=1.2–2.75, 3.7–3.9 in this case), arms triangular, variably short to elongate. Characterised by compact, imbricate, fenestrate abactinal plates irregular in shape, but weakly convex, mound-like in overall appearance. Body surface overlaid by thick dermal tissue invested with granules bearing pointed tips, variable in abundance, density and homogeneity, covering abactinal marginal and actinal surface, obscuring plate boundaries. In other species, actinolateral fringe discrete with larger, thicker spines variably present. Actinal regions relatively large, plates imbricate in transverse series. Adambulacral armature prominent, forming a spiny fringe along tube foot groove. Two to five furrow spines.

Comments. Four species of Poraniomorpha are currently recognised: P. abyssicola ( Verrill, 1895) , P. bidens Mortensen 1932 , P. hispida ( Sars, 1872) , and P. tumida ( Stuxberg, 1878) , all of which occur in the North Atlantic and adjacent waters. This is the first occurrence of Poraniomorpha in the Southern Hemisphere.

Kingdom

Animalia

Phylum

Echinodermata

Class

Asteroidea

Order

Valvatida

Family

Poraniidae

Loc

Poraniomorpha Danielssen and Koren 1881

Mah, Christopher L. 2023
2023
Loc

Lasiaster

Verrill, A. E. 1899: 198
Bell, F. J. 1893: 81
Sladen, W. P. 1889: 372
1889
Loc

Rhegaster

Verrill, A. E. 1914: 17
Bell, F. J. 1893: 80
Sladen, W. P. 1889: 367
Sladen, W. P. 1883: 155
1883
Loc

Poraniomorpha

Mah, C. L. & Foltz, D. W. 2014: 350
Clark, A. M. & Downey, M. E. 1992: 212
Clark, A. M. 1984: 33
Djakonov, A. M. 1950: 58
Gallo, V. R. 1937: 1664
Mortensen, T. 1927: 92
Koehler, R. 1924: 157
Fisher, W. K. 1911: 248
Grieg, J. A. 1907: 41
Verrill, A. E. 1895: 139
Danielssen, D. C. & Koren, J. 1881: 189
1881
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