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Free Content Variation in Raja Garmani and the Status of Raja Lentiginosa (Pisces: Rajidae)

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Abstract:

Specimens of Raja garmani and R. lentiginosa were examined throughout their respective ranges and, based on the anatomy of their claspers, it is concluded that they are not specifically different. R. garmani consists of four subspecies, each of which can be distinguished by a combination of characters. R. garmani virginica which occurs off the east coast of the United States, north of Cape Hatteras, is relatively large at maturity, has a distinct rosette color pattern and the clasper glans possesses a sentinel which extends to about two-thirds the length of the spike and bears blunt, poorly developed protuberances. R. g. garmani which occurs off the east coast of the United States, south of Cape Hatteras, is small at maturity, has a distinct rosette color pattern and possesses a sentinel which extends to about two-thirds the length of the spike and bears blunt, poorly developed protuberances. R. garmani lentiginosa which occurs in the Gulf of Mexico is large at maturity, has a color pattern of diffuse dark and light spots and possesses a sentinel which extends to about two-thirds the length of the spike and bears well developed, sharppointed protuberances. R. garmalli caribbaea which occurs off the coast of Central America is small at maturity, has a color pattern intermediate to the east coast and Gulf of Mexico subspecies and possesses a sentinel which extends distal to the spike and bears well developed, sharp-pointed protuberances.

The subspecies occupy the same depths but are allopatrically distributed and separated from each other by steep thermal gradients.

The clasper of R. garmani is distinctly different from all those that have been described for the genus Raja.

Document Type: Research Article

Publication date: July 1, 1977

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  • The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.
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