WoRMS taxon details
Bradleya nuda Benson, 1972
461426 (urn:lsid:marinespecies.org:taxname:461426)
accepted
Species
marine, brackish, fresh, terrestrial
Benson, R.H. (1972). The <i>Bradleya</i> Problem, with descriptions of two new psychrospheric ostracode genera, <i>Agrenocythere</i> and <i>Poseidonamicus</i> (Ostracoda: Crustacea). <em>Smithsonian Contributions to Paleobiology.</em> (12), 1-138., available online at http://si-pddr.si.edu/jspui/handle/10088/1879 [details] Available for editors 
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Type locality contained in Japanese Exclusive Economic Zone
type locality contained in Japanese Exclusive Economic Zone [details]
Description Most similar to Bradleya paranuda, new species, a smooth, reticulum-free Recent species from the Philippines, except for a...
Description Most similar to Bradleya paranuda, new species, a smooth, reticulum-free Recent species from the Philippines, except for a more indrawn anterior margin and different and more abundant traces of the reticulum (compare Plate 7: figures 5 and 7) in B. nuda. Also very close in appearance to B. proarata Hornibrook, which is about the same size (from the Paleogene of New Zealand). This older species, however, is sighted (eye tubercules present). The two forms are undoubtedly very similar, and the difference of sight and also the cause of the smoothness of the carapace are significant factors in suggesting their taxonomic separation. It is not yet known (but inferred by Hornibrook) if the smoothness of B. proarata is caused by loss of muri of infilling of fossae by celation (the only specimens of B. proarata I have seen are immature instars and not celate). The resultant appearance could be much the same. As mentioned in the comparative statements of the description of B. japonica, new species, these two species have similar elements of the reticular pattern in common, although there are far fewer in B. nuda. It is noteworthy that the pores along the anterior portion of the ventrolateral carina are in pairs rather than singular, as in the case in the posterior portion. These same paired pores can be found in B. japonica and even in B. arata. Bradleya arata is similar to B. nuda in outline and in the tendency to become smooth. However, no signs of celation can be observed in B. nuda. Either the developmental process has continued to completely fill in the reticulum of the ancestors of B. nuda, or, on the other hand, the reticulum has simply been absorbed into the development of a thicker shell as suggested by the intermediate morphological series stage represented by B. japonica. The existence of B. japonica is very strong evidence to suggest that the nudity of B. nuda is the result of mural loss, and not the paving over of the outer surface by a secondary tegmen as occurs in the process of celation. The tendency toward the removal of the reticulum is success fully compensated for by an increase in the mass or the thickness (including celation) of the shell, as well as by a flaring of the ventrolateral ridge to produce a more triangular (and theoretically stronger) cross-section. [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 nuda Benson, 1972. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=461426 on 2024-11-10
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original description
Benson, R.H. (1972). The <i>Bradleya</i> Problem, with descriptions of two new psychrospheric ostracode genera, <i>Agrenocythere</i> and <i>Poseidonamicus</i> (Ostracoda: Crustacea). <em>Smithsonian Contributions to Paleobiology.</em> (12), 1-138., available online at http://si-pddr.si.edu/jspui/handle/10088/1879 [details] Available for editors [request]
[request]
Present Present in aphia/obis/gbif/idigbio Inaccurate Introduced: alien Containing type locality
From editor or global species database
Description Most similar to Bradleya paranuda, new species, a smooth, reticulum-free Recent species from the Philippines, except for a more indrawn anterior margin and different and more abundant traces of the reticulum (compare Plate 7: figures 5 and 7) in B. nuda. Also very close in appearance to B. proarata Hornibrook, which is about the same size (from the Paleogene of New Zealand). This older species, however, is sighted (eye tubercules present). The two forms are undoubtedly very similar, and the difference of sight and also the cause of the smoothness of the carapace are significant factors in suggesting their taxonomic separation. It is not yet known (but inferred by Hornibrook) if the smoothness of B. proarata is caused by loss of muri of infilling of fossae by celation (the only specimens of B. proarata I have seen are immature instars and not celate). The resultant appearance could be much the same. As mentioned in the comparative statements of the description of B. japonica, new species, these two species have similar elements of the reticular pattern in common, although there are far fewer in B. nuda. It is noteworthy that the pores along the anterior portion of the ventrolateral carina are in pairs rather than singular, as in the case in the posterior portion. These same paired pores can be found in B. japonica and even in B. arata. Bradleya arata is similar to B. nuda in outline and in the tendency to become smooth. However, no signs of celation can be observed in B. nuda. Either the developmental process has continued to completely fill in the reticulum of the ancestors of B. nuda, or, on the other hand, the reticulum has simply been absorbed into the development of a thicker shell as suggested by the intermediate morphological series stage represented by B. japonica. The existence of B. japonica is very strong evidence to suggest that the nudity of B. nuda is the result of mural loss, and not the paving over of the outer surface by a secondary tegmen as occurs in the process of celation. The tendency toward the removal of the reticulum is success fully compensated for by an increase in the mass or the thickness (including celation) of the shell, as well as by a flaring of the ventrolateral ridge to produce a more triangular (and theoretically stronger) cross-section. [details]Diagnosis Distinguished from other species of Bradleya by its smooth, nonfoveolate carapace, devoid of a reticulum except for faint traces in the posterocentral region. A posteriorly directed process surmonts the posterior cardinal angle, and a sharp ridge runs from the posterior end of the bold and smooth ventrolateral carina around to a major spine on the posteroventral margin. No eye tubercule is visible [details]
