WoRMS taxon details
Bradleya thomasi Steineck & Yozzo, 1988
527566 (urn:lsid:marinespecies.org:taxname:527566)
accepted
Species
marine, brackish, fresh, terrestrial
recent + fossil
Steineck, P.L. and Yozzo, D. (1988a) The Late Eocene-Recent Bradleya johnsoni Benson lineage (Crustacea, Ostracoda) in the central equatorial Pacific. Journal of Micropalaeontology 7, 187–199. [details]
Type locality contained in Mozambique Channel
type locality contained in Mozambique Channel [details]
Description "Carapace large, robust; elongate-oval in shape with a broadly rounded anterior margin with 12-15 short denticles and a...
Distribution "Upper Miocene (N16) to Quaternary, sites 572, 573 and 574, Leg 85 DSDP-IPOD, central equatorial Pacific; paleodepth 3-4 km....
Etymology "Dr. Ellen Thomas, Wesleyan University, in recognition of her exemplary studies of Cenozoic deep-sea foraminifera1 faunas."...
Description "Carapace large, robust; elongate-oval in shape with a broadly rounded anterior margin with 12-15 short denticles and a truncate posterior margin with prominent spines in dorsal and ventral corners. Dorsal margin straight except for anterior projection. Greatest width at central margin. Ventral margin gently concave in lateral view, broad and flat. Valve surface reticulate containing thin, sharp-edged muri enclosing shallow, flat to weakly concave sola. Muri and sola densely foveolate; foveolae stellate in outline. A single row of foveolae is present on the lateral surfaces of muri. Horizontal and vertical muri equally emphasised. Posterior reticulum composed of a honeycomb arrangement of polygonal cells. Posteromedian ridge subdued and disrupted.
Ponticulate ventrolateral carina prominent and flaring, continuing anteriorly into a subdued ocular ridge. Bridge present; PBC prominent, typical in form with low rampart. Internal space of mural loop closed dorsally by weak horizontal partitions but tending to be open in ventral portion. Sensillum pores of two types: medium-sized conjunctive or intramural pores situated in low conuli; large sieve-pores located in sola, projecting from surface on high, celate, foveolate tubercles. Anterior inner lamellae broad, without a vestibule; 12-15 normal pore canals, concentrated in ventral third. Hinge holoamphidont, massively calcified with faintly crenulate median element. Eye tubercle absent. Dimorphic; presumed males longer and less concave ventrally than females. Muscle scars include three vertically aligned, reinform adductor scars and two similarly shaped frontal scars. Posteroventral reticulum polymorphic." (Steineck; Yozzo, 1988) [details]
Ponticulate ventrolateral carina prominent and flaring, continuing anteriorly into a subdued ocular ridge. Bridge present; PBC prominent, typical in form with low rampart. Internal space of mural loop closed dorsally by weak horizontal partitions but tending to be open in ventral portion. Sensillum pores of two types: medium-sized conjunctive or intramural pores situated in low conuli; large sieve-pores located in sola, projecting from surface on high, celate, foveolate tubercles. Anterior inner lamellae broad, without a vestibule; 12-15 normal pore canals, concentrated in ventral third. Hinge holoamphidont, massively calcified with faintly crenulate median element. Eye tubercle absent. Dimorphic; presumed males longer and less concave ventrally than females. Muscle scars include three vertically aligned, reinform adductor scars and two similarly shaped frontal scars. Posteroventral reticulum polymorphic." (Steineck; Yozzo, 1988) [details]
Distribution "Upper Miocene (N16) to Quaternary, sites 572, 573 and 574, Leg 85 DSDP-IPOD, central equatorial Pacific; paleodepth 3-4 km....
Distribution "Upper Miocene (N16) to Quaternary, sites 572, 573 and 574, Leg 85 DSDP-IPOD, central equatorial Pacific; paleodepth 3-4 km. Recent of Mozambique Channel (Benson, 1972) and Florida-Hatteras Slope (Cronin, 1983)." (Steineck; Yozzo, 1988) [details]
Etymology "Dr. Ellen Thomas, Wesleyan University, in recognition of her exemplary studies of Cenozoic deep-sea foraminifera1 faunas."...
Etymology "Dr. Ellen Thomas, Wesleyan University, in recognition of her exemplary studies of Cenozoic deep-sea foraminifera1 faunas." (Steineck; Yozzo, 1988) [details]
Brandão, S.N.; Antonietto, L.S; Nery, D.G.; Pereira, J.S.; Praxedes, R.A.; Santos, S.G.; Karanovic, I. (2024). World Ostracoda Database. Bradleya thomasi Steineck & Yozzo, 1988. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=527566 on 2024-11-12
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original description
Steineck, P.L. and Yozzo, D. (1988a) The Late Eocene-Recent Bradleya johnsoni Benson lineage (Crustacea, Ostracoda) in the central equatorial Pacific. Journal of Micropalaeontology 7, 187–199. [details]
additional source Bergue, C T; Govindan, A. (2010). Eocene-Pliocene deep sea ostracodes from ODP site 744A, Southern Indian Ocean. <em>Annals of the Brazilian Academy of Sciences.</em> 82 (3): 747-760., available online at http://www.scielo.br/pdf/aabc/v82n3/21.pdf [details] Available for editors
[request]
additional source Bergue, C T; Govindan, A. (2010). Eocene-Pliocene deep sea ostracodes from ODP site 744A, Southern Indian Ocean. <em>Annals of the Brazilian Academy of Sciences.</em> 82 (3): 747-760., available online at http://www.scielo.br/pdf/aabc/v82n3/21.pdf [details] Available for editors
[request]
Present Present in aphia/obis/gbif/idigbio Inaccurate Introduced: alien Containing type locality
From editor or global species database
Description "Carapace large, robust; elongate-oval in shape with a broadly rounded anterior margin with 12-15 short denticles and a truncate posterior margin with prominent spines in dorsal and ventral corners. Dorsal margin straight except for anterior projection. Greatest width at central margin. Ventral margin gently concave in lateral view, broad and flat. Valve surface reticulate containing thin, sharp-edged muri enclosing shallow, flat to weakly concave sola. Muri and sola densely foveolate; foveolae stellate in outline. A single row of foveolae is present on the lateral surfaces of muri. Horizontal and vertical muri equally emphasised. Posterior reticulum composed of a honeycomb arrangement of polygonal cells. Posteromedian ridge subdued and disrupted.Ponticulate ventrolateral carina prominent and flaring, continuing anteriorly into a subdued ocular ridge. Bridge present; PBC prominent, typical in form with low rampart. Internal space of mural loop closed dorsally by weak horizontal partitions but tending to be open in ventral portion. Sensillum pores of two types: medium-sized conjunctive or intramural pores situated in low conuli; large sieve-pores located in sola, projecting from surface on high, celate, foveolate tubercles. Anterior inner lamellae broad, without a vestibule; 12-15 normal pore canals, concentrated in ventral third. Hinge holoamphidont, massively calcified with faintly crenulate median element. Eye tubercle absent. Dimorphic; presumed males longer and less concave ventrally than females. Muscle scars include three vertically aligned, reinform adductor scars and two similarly shaped frontal scars. Posteroventral reticulum polymorphic." (Steineck; Yozzo, 1988) [details]
Distribution "Upper Miocene (N16) to Quaternary, sites 572, 573 and 574, Leg 85 DSDP-IPOD, central equatorial Pacific; paleodepth 3-4 km. Recent of Mozambique Channel (Benson, 1972) and Florida-Hatteras Slope (Cronin, 1983)." (Steineck; Yozzo, 1988) [details]
Etymology "Dr. Ellen Thomas, Wesleyan University, in recognition of her exemplary studies of Cenozoic deep-sea foraminifera1 faunas." (Steineck; Yozzo, 1988) [details]
Remark "The PBC and the arrangement of posteroventral reticular elements differentiate B. thomasi from B. dictyon (Brady). The bridge of B. dictyon is subdivided internally by horizontal and vertical partitions; its posterior termination consists of a straight or gently curved ridge of variable height which supports a single horizontal mum projecting into the lumen of the mural loop (Benson, 1972, fig. 13b; Whatley et al., 1984, p. 287, pl. 1, figs. 1-3). In B. dictyon, the posteroventral reticulum is most often complex and non-rectilinear (Ducasse & Peypouquet, 1979, pl. 3, fig. 9; Whatley et al., 1984, pl. 1, figs. 2, 3). However, Benson (1972, fig. 13b) figured a specimen from the Recent of the eastern Pacific with three rows of vertically aligned fossae. This pattern, although reminiscent of B. thomasi, nevertheless lacks the characteristic triplet of fossae enumerated as EE’E (see Plate 3, fig. 4; Fig. 5c) of that species.
Bradfeya fordhowensis Whatley, Downing, Kesler & Harlow from the upper Neogene of the Lord Howe Rise resembles B. thomasi in size, outline, and in the low, delicate reticulum. In the former taxon, the bridge is absent or suppressed in contrast to its prominent development in the latter. These forms also differ in the number of fossae in the region posterior to the mural loop and immediately below the posteromedian ridge. In B. thomasi, four quadrangular fossae form a box-like cluster (Pl. 3, fig. 5). This is replaced in B. fordhowensis by a roughly triangular group of three fossae whose basal element is circular in outline (Whatley et al., 1984, pl. 2, figs. 10, 12).
Bradfeya johnsoni Benson is more heavily calcified and has higher, excavate, distally rounded muri with multiple rows of lateral foveolae. In addition, in this species, the PBC is enclosed by an elevated, flat-topped rampart which contrasts with the more subdued and rounded rampart of B. thomasi. Most specimens of B. thomasi can be distinguished from B. johnsoni by the absence of a prominent posteromedian ridge and the diminished contrast between primary and secondary muri." (Steineck; Yozzo, 1988) [details]
