Morphological variability of Bathybdella sawyeri (Hirudinida : Piscicolidae) from hydrothermal vents on the Galapagos Rift and the South East Pacific Rise

Type Article
Date 2006-08-11
Language English
Author(s) Burreson Eugene1, Segonzac Michel2
Affiliation(s) 1 : Virginia Inst Marine Sci, Coll William & Mary, Gloucester Point, VA 23062 USA.
2 : IFREMER, Ctr Brest, DRO LEP Centob, F-29280 Plouzane, France.
Source Zootaxa (1175-5326) (Magnolia Press), 2006-08-11 , Vol. 1286 , P. 15-21
WOS© Times Cited 4
Keyword(s) Cyanagraea, Bythograeidae, Bathybdella, Hydrothermal vent, East Pacific Rise, Piscicolidae, Hirudinida
Abstract The deep-sea fish leech Bathybdella sawyeri Burreson has recently been collected from two sites on the South East Pacific Rise at approximately 14 degrees and 17 degrees S, 2623 - 2586 m depth. Leeches were obtained from washings of vent mussels Bathymodiolus thermophilus (Mytilidae) and clams Calyptogena magnifica (Vesicomyidae) collected with a grab by a submersible, or were found attached to the cheliped of the crab Cyanagraea praedator (Bythograeidae) collected in baited traps at 14 S. Most individual leeches had morphology typical of B. sawyeri as originally described, with suckers of approximately equal size, but all specimens collected from the crab C. praedator had unusually large oral suckers that were distinctly larger than the caudal sucker. However, internal morphology of the specimens from C. praedator was identical to B. sawyeri on the basis of serial sections; thus all specimens were identified as B. sawyeri. The only previous report of B. sawyeri is from the Galapagos Rift, so these collections extend the range to the South East Pacific Rise.
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Burreson Eugene, Segonzac Michel (2006). Morphological variability of Bathybdella sawyeri (Hirudinida : Piscicolidae) from hydrothermal vents on the Galapagos Rift and the South East Pacific Rise. Zootaxa, 1286, 15-21. Open Access version : https://archimer.ifremer.fr/doc/00000/2049/