Open Access Open Access  Restricted Access Subscription or Fee Access

Validation of Astropecten jarli Madsen, 1950 and implications for A. cingulatus Sladen, 1883 (Paxillosida: Astropectinidae)

JOHN M. LAWRENCE, JANESSA COBB

Abstract


Astropecten is a major paxillosid genus with a widely occurring presence in tropical and temperate seas. Astropecten jarli from off the west coast of Africa, in the Eastern Atlantic Region, was placed in synonymy with Astropecten cingulatus, a widespread species from the Western Atlantic Region, producing the only amphi-Atlantic Astropecten species. Examination of the holotypes of both species and other specimens of A. cingulatus and A. jarli revealed that A. jarli has a greater major radius:minor radius than A. cingulatus at all sizes, a unique adambulacral spine configuration, and different spination on the inferomarginal plates. ANCOVA indicates A. cingulatus and A. jarli have similar major radius:number of superomarginal plates at small sizes but are distinguishable by the number of superomarginal plates in large individuals. The ratio of the width of the paxillar area:width of the superomarginal plates is greater in A. jarli. Some specimens identified as A. cingulatus from the Eastern Atlantic Region do not fit the description of either A. cingulatus or A. jarli. We conclude that A. jarli is morphologically distinct from A. cingulatus and should be recognized as a valid species. Astropecten cingulatus does not have an amphi-Atlantic distribution and is limited to the Western Atlantic Region.


Keywords


Asteroidea, amphi-Atlantic distribution, taxonomy, biodiversity, zoogeography, Echinodermata

Full Text:

PDF (5MB)

References


Bernasconi, I. (1941) Los equinodermos de la expedición del Buque oceanográfico “Comodoro Rivadavia” ARA. Physis, 19, 37–49.

Carrera-Rodríguez, C. & Tommasi, L.R. (1977) Asteroidea de la plataforma continental de Rio Grande do Sul (Brasil), coleccionados duante los viajes del N/Oc. “Prof. W. Besnard” para el Proyecto Rio Grande do Sul. Boletim do Instituto Oceanográfico, 26, 51–130.
https://doi.org/10.1590/S0373-55241977000100004

Cherbonnier, G. & Nataf, G. (1973) Astropecten des côtes occidentales d’Afrique. Bulletin du Muséum National d’Histoire Naturelle, Paris, 120, 1233–1302.

Clark, A.M. & Downey, M.E. (1992) Starfishes of the Atlantic. Chapman & Hall, London, 663 pp.

Clarke, K.R. & Gorley, R.N. (2006) PRIMER v6: User Manual/Tutorial. PRIMER-E, Plymouth, 192 pp.

Döderlein, L. (1917) Die Asteriden der Siboga-Expedition. 1. Die Gattung Astropecten und ihre Stammesgeschichte. Siboga-Expeditie, 46a, 1–190.

Downey, M.E. (1973) Starfishes from the Caribbean and the Gulf of Mexico. Smithsonian Contributions to Zoology, No. 126, 1–158
https://doi.org/10.5479/si.00810282.126

Madsen, F.J. (1950) The echinoderms collected by the Atlantide–Expedition 1945–46. I. Asteroidea. Atlantide Reports, 1, 167–222.

Martínez, S. (2009) Shallow water Asteroidea and Ophiuroidea of Uruguay: composition and biogeography. Revista de Biología Tropicale, 56, 205–214.

OBIS (2015a) Distribution records of Astropecten cingulatus (Sladen, 1989). Available from Ocean Biogeographic Information System. Intergovernmental Oceanographic Commission of UNESCO. Available from http://www.iobis.org (accessed 10 November, 2015).

OBIS (2015b) Distribution records of Astropecten cingulatus (Sladen, 1989). Diveboard - Scuba diving citizen science observations. Available from Ocean Biogeographic Information System. Intergovernmental Oceanographic Commission of UNESCO. Available from: http://www.iobis.org (accessed 10 November 2015)

Sladen, W.P. (1883) The Asteroidea of H.M.S. ‘Challenger’ expedition — Part II Astropectinidae. Journal of the Linnean Society of London, Zoology, 17, 214–269.
https://doi.org/10.1111/j.1096-3642.1883.tb02022.x

Sladen, W.P. (1889) The Asteroidea. Report on the Scientific Results of the Voyage of H.M.S. Challenger. Zoology, 30, 1–935.




DOI: http://dx.doi.org/10.11646/zootaxa.4269.1.4

Refbacks

  • There are currently no refbacks.


 
ISSN 1175-5326 (Print Edition) & ISSN 1175-5334 (Online Edition)
Published by Magnolia Press, Auckland, New Zealand