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30 results for “Eolepadidae”
FIGURE 8. Vulcanolepas scotiaensis Appendages and trophi. a in Vulcanolepas scotiaensis sp. nov., a new deep-sea scalpelliform barnacle (Eolepadidae: Neolepadinae) from hydrothermal vents in the Scotia Sea, Antarctica
FIGURE 8. Vulcanolepas scotiaensis Appendages and trophi. a: Cirrus I; b: Cirrus II. c Right second maxilla; d: Right maxilla (or maxillule); e: Right mandible, showing modification of the two lower teeth and the inferior angle into a comb-like structure, a characteristic feature of the neolepadines noted in Southward & Newman, (1998: 261). f: Intermediate segment of cirrus VI, showing six pairs of long, simple setae and below these, three pairs of successively shorter, finer setae (setae truncated). g: Uni-articulate caudal appendage. (Note that in these diagrams, the density of the setae on the trophi is reduced). From JC42-F-0396.
FIGURE 2 in Vulcanolepas scotiaensis sp. nov., a new deep-sea scalpelliform barnacle (Eolepadidae: Neolepadinae) from hydrothermal vents in the Scotia Sea, Antarctica
FIGURE 2. Distribution of described species of Neolepadinae. In addition to these eight species, Newman et al. (2006) list at least a further nine taxa to be described. These new taxa are not defined at genus level here, nor is their distribution likely to be complete; they are included to provide an appreciation of the wide distribution of the subfamily. Although primarily from the eastern and southern Pacific Ocean, these undescribed taxa include a form intermediate between Leucolepas and Neolepas from the Indian Ocean Ridge (Newman et al., 2006: 362). It is likely that further neolepadines will be found as the known distribution is a reflection of where sampling regimes have been most active; the apparent absence of neolepadines from the widely sampled mid Atlantic Ridge refugial ecosystems is nonetheless surprising.
FIGURE 1 in Vulcanolepas scotiaensis sp. nov., a new deep-sea scalpelliform barnacle (Eolepadidae: Neolepadinae) from hydrothermal vents in the Scotia Sea, Antarctica
FIGURE 1. Locality diagram. Regional setting of the East Scotia Ridge back-arc basin, some 400–500 kilometres southeast of South Georgia in the Southern Ocean. Vent-field segments E2 and E9 of the ESR (shown by stars) are roughly positioned along a longitudinal line immediately to west of the South Sandwich Islands.
FIGURE 7. Vulcanolepas scotiaensis Plate morphology. a in Vulcanolepas scotiaensis sp. nov., a new deep-sea scalpelliform barnacle (Eolepadidae: Neolepadinae) from hydrothermal vents in the Scotia Sea, Antarctica
FIGURE 7. Vulcanolepas scotiaensis Plate morphology. a: Capitulum (left side, exterior) showing plate arrangement (carina, rostrum and peduncle removed); b: Capitulum (interior) showing plate arrangement; c: Carina (exterior); d: Carina (interior); e: Rostrum (exterior); f: Rostrum (interior). From JC42-F-0396.
FIGURE 10b in Vulcanolepas scotiaensis sp. nov., a new deep-sea scalpelliform barnacle (Eolepadidae: Neolepadinae) from hydrothermal vents in the Scotia Sea, Antarctica
FIGURE 10b. Ratios of peduncle to capitulum length. Ratios of peduncle to capitulum lengths for the "robust" variety only. The extrapolation shown is a power regression, demonstrating that there is almost no correlation between growth and the ratio between peduncle and capitulum length. Data extracted from Figure 10a for the 14 specimens from JC42-F0122)
FIGURE 6 in Vulcanolepas scotiaensis sp. nov., a new deep-sea scalpelliform barnacle (Eolepadidae: Neolepadinae) from hydrothermal vents in the Scotia Sea, Antarctica
FIGURE 6. Vulcanolepas scotiaensis sp. nov., external morphology. a: Capitulum (left side, exterior), "gracile" form, peduncle truncated, from JC42-F-0396; b: Capitulum (left side, exterior), more heavily sculpted "robust" form (peduncle truncated), from JC42-F-0122; c: Complete animal (left side, exterior), more heavily sculpted "robust" form, showing a capitulum that is slightly longer than the peduncle, from JC42-F-0122; d: Complete animal (left side, exterior), "gracile" form, from JC42-F-0396; e: Complete animal (left side, exterior), "gracile" form (juvenile), from JC42-F-0396; f: Complete animal (right side, exterior), "gracile" form (adult) showing a peduncle that is at least ten times the length of the capitulum, from JC42-F-0396.
FIGURE 11 in Vulcanolepas scotiaensis sp. nov., a new deep-sea scalpelliform barnacle (Eolepadidae: Neolepadinae) from hydrothermal vents in the Scotia Sea, Antarctica
FIGURE 11. Benthic Ecology: The V. scotiaensis sp. nov. assemblage at the "Carwash" vent chimney in the E9 vent field (60°02.809S, 29°58904W), East Scotia Ridge Back-Arc Basin. a: Photograph DSCN9734, showing V. scotiaensis sp. nov. as the dominant organism living at this site. a specimen of the decapod Kiwa (arrowed) may be seen above and slightly to the right of the letter 'a'; a larger, pink anemone, Pacmanactis sp. (arrowed), is on the left margin. Image taken by the Scorpio stills camera on Isis, Dive 138. b: Photograph DSCN0191, showing detail of V. scotiaensis sp. nov. in feeding mode with extended, delicate, filamentous cirri. A specimen of the limpet Lepetodrilus sp. was grazing on the exterior of one of the larger peduncles (arrowed). Image taken by the Scorpio stills camera on Isis, Dive 140. Only the 'gracile variety' of V. scotiaensis sp. nov. is present in these two photographs, both taken at circa 2400 metres, where temperatures in the barnacle assemblage zone ranges between 5 and 19°C (Marsh et al., 2012). Scale: diameter of largest peduncle (arrowed) circa 6mm.
FIGURE 4 in A new species of hydrothermal vent stalked barnacle Vulcanolepas (Scalpelliforms: Eolepadidae) from the North Fiji Basin, Southwestern Pacific Ocean
FIGURE 4. Ƒulcanolepas fijiensis sp. nov. Holotype. A. Cirrus I - distal half of ramus bearing antenniform segments (antenniform segs), proximal half bearing robust segments (robust segs). B. Cirrus II - antenniform segments on distal half of ramus. Insert showing magnified segments of distal region. C. Cirrus III. Insert showing magnified intermediate segments. D. Cirrus IV. Insert showing magnified intermediate segments. E. Cirrus V. Insert showing magnified intermediate segments. F. Cirrus VI. Insert showing magnified intermediate segments. G. Penis. H. Caudal appendages. Scale bars in µm.
FIGURE 3 in A new species of hydrothermal vent stalked barnacle Vulcanolepas (Scalpelliforms: Eolepadidae) from the North Fiji Basin, Southwestern Pacific Ocean
FIGURE 3. Ƒulcanolepas fijiensis sp. nov. Holotype. A. Whole view, habitus, left side. B, C. Capitulum (left and right sides), showing paired terga (T) and scuta (S) and unpaired carina (CA), lateral (L) and rostrum (R). D, E. Capitulum, carinal and rostral view. F. Dissected capitulum, showing inner surface of capitular plates (white and smooth). Cirrus I is not separated from the remaining pairs of cirri (I, II, III indicate cirri I, II and III).
FIGURE 9 in Vulcanolepas scotiaensis sp. nov., a new deep-sea scalpelliform barnacle (Eolepadidae: Neolepadinae) from hydrothermal vents in the Scotia Sea, Antarctica
FIGURE 9. Vulcanolepas scotiaensis Peduncular scale arrangement. From peduncle of a mature "gracile" specimen, oriented with capitulum to top (capitulum length: 20 mm, peduncle length: 170mm). a: Arrangement immediately above the base of the peduncle; b: Arrangement mid-length along the peduncle, showing widely spaced scales and an attached juvenile; c:. Arrangement close to the capitulum, showing close proximity of small scales, (lower part of capitulum visible). Specimen from JC42-F-0396.
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