. Bulletin of the Natural History Museum (Zoology). 174 gvc Fig. 7 Erenna richardi. A-D. Early stages in the development of a tentillum. Scale mm. c cnidoband; dc diverticular canal; gvc gastrovascular canal; o 'ocellus';/; pedicle; tp terminal process. egg. The immature gonodendra (Fig. 5E) were more darkly pigmented and had a relatively long stalk which typically bifurcated close to its apex, with the gonophores being developed on the branches. One of these branches could be denuded and could be mistaken for a gonopalpon. Occasionally small gonophores were budded off approximat


. Bulletin of the Natural History Museum (Zoology). 174 gvc Fig. 7 Erenna richardi. A-D. Early stages in the development of a tentillum. Scale mm. c cnidoband; dc diverticular canal; gvc gastrovascular canal; o 'ocellus';/; pedicle; tp terminal process. egg. The immature gonodendra (Fig. 5E) were more darkly pigmented and had a relatively long stalk which typically bifurcated close to its apex, with the gonophores being developed on the branches. One of these branches could be denuded and could be mistaken for a gonopalpon. Occasionally small gonophores were budded off approximately half way up the stalk. No gonophores were found with the JSL I Dive 2889. However, two specimens from the Discovery collections also bore only female gonodendra. DISTRIBUTION. Of the four specimens of Erenna richardi col- lected by the JSL submersibles, one came from the vicinity of the Dry Tortugas, between Florida and Cuba; two from The Bahamas; and one from c. 27°N 85°W in the Gulf of Mexico (Rebeca Gasca - personal communication). The species also has been found occasion- ally in recent Discovery collections in the North Atlantic, mainly south of 35°N and at depths greater than 1000 m. Much of the material is in too poor a condition to identify to species, although it seems likely that the presence of black pigment in the radial canals of the nectophore is specific to E. richardi. However, one large specimen, comprising 34 nectophores, over 400 bracts and several stem pieces, from Discovery St. 8599 (c. 8°40'N 23°14'W; depth 300O-3500m). clearly is E. richardi: as is a specimen from St. I0157#3(31°'N 13°W; 650-1000 m). In addition some damaged nectophores that can be referred to this species have been collected by four hauls fished m above the bottom in the proximity of the Rainbow' and 'Lucky Strike' vents on the Mid-Atlantic Ridge (c. 37-38°N, 32-33°W; depth range 1793-2613 m). Better preserved material has also been collected recently in the vicinit


Size: 1184px × 2111px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bhlconsortium, bookcollectionbiodiversity, bookcontributornatura