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Ostracoda taxon detailsBradleya mesembrina Mazzini, 2005
 461424 (urn:lsid:marinespecies.org:taxname:461424)
accepted
Species
marine,
Mazzini, I. (2005). Taxonomy, biogeography and ecology of quaternary Benthic Ostracoda (Crustacea) from circumpolar deep water of the Emerald Basin (Southern Ocean) and the S Tasman Rise (Tasman Sea). <em>Senckenbergiana maritima.</em> 35(1): 1-119., available online at https://doi.org/10.1007/bf03043180 [details] Available for editors
 [request]
Type locality contained in Tasman Sea
type locality contained in Tasman Sea [details]
Description Robust sub-rectangular species of the non-B, dictyon group (WHaTLEY et al. 1984). Anterior margin asymmetrically rounded...
Description Robust sub-rectangular species of the non-B, dictyon group (WHaTLEY et al. 1984). Anterior margin asymmetrically rounded (L) to evenly rounded (R). Posterior margin truncated in R, asymmetrically rounded in L. Thick marginal rims, anterior of which with short spines, posterior bearing few spines medially. Dorsal margin sinuous due to the pronounced dorsal carina and the hinge ear. Ventral margin straight. Greatest length below mid-height, greatest height at anterior cardinal angle. Well developed reticulum with pronounced muri some of which are suppressed. Asa resuh, many fossae are fused, especially posteriorly. Antero-ventral carina strong or suppressed near the ocular ridge area. Postero-dorsal carina short, extending from the posterior rito till immediately above the MS zone, where it is deflected into the irregular bridge structure. Each solum of the fossae is covered with small circular pits arranged in chains, surface of muri smooth as is the exterior surface above the MS attachment point. Normal pores borh in conjunctive and disjunctive positions. They are sieve-type but the sieve plate is in different positions: closer to the internal surface when they ate intramural, doser to the outer surface when they open on the soluto (Figs. 47J-K). Marginal pore-canals straight, simple, occasionally bifurcate in the ventral area, 21-27 anteriorly, 10- 13 posteriorly. In dorsal view, maximum width in the poster~ ior third at the edge of the ventral carina. Internally: dorsal margin straight, ventral margin slightly concave in the oral region. Inner lamella wide, vestibulum not developed, selvage moderately strong. Hinge holamphidont. R with stepped AT and kidney-shaped PT, median groove smooth with a small, round socket opening behind the AT. L with deep AS and adjacent round tooth, median bar smooth and widening at both ends. PS wide with peculiar oblique incisions inside. Adductor MS consist of a vertical row of four: the upper most oval, the second uppermost dongate and the lower two smaller, elongate and close to each other. Two frontal scars, the lowermost drop-shaped and larger than the round posterior one. In juveniles, the younger the instars the more the secondary reticulation expands on the muri. In many specimens, a horizontal median carina is present, parallel to the other two. The hinge is paramphidont with faintly lobate PT. [details] Etymology From the Greek adjective mesembrinos = Southern; referring to the Southern Ocean where this species has been found.
Etymology From the Greek adjective mesembrinos = Southern; referring to the Southern Ocean where this species has been found. [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 mesembrina Mazzini, 2005. Accessed at: https://www.marinespecies.org/ostracoda/aphia.php?p=taxdetails&id=461424 on 2025-03-03
Date action by
original description
Mazzini, I. (2005). Taxonomy, biogeography and ecology of quaternary Benthic Ostracoda (Crustacea) from circumpolar deep water of the Emerald Basin (Southern Ocean) and the S Tasman Rise (Tasman Sea). <em>Senckenbergiana maritima.</em> 35(1): 1-119., available online at https://doi.org/10.1007/bf03043180 [details] Available for editors
[request]additional source Sasaki, S.; Irizuki, T.; Itaki, T.; Tokuda, Y.; Ishiwa, T.; Suganuma, Y. (2022). Relationship between Modern Deep-Sea Ostracods and Water Mass Structure in East Antarctica. <em>Paleontological Research.</em> 27(2)., available online at https://doi.org/10.2517/pr210033 [details] Available for editors [request]additional source Yasuhara, M., Cronin, T.M., Hunt, G. & Hodell, D.A. (2009) Deep-Sea Ostracods from the South Atlantic Sector of the Southern Ocean during the Last 370,000 Years. Journal of Paleontology, 83, 914-930., available online at https://doi.org/10.1666/08-149.1 [details] Available for editors [request] Present Inaccurate Introduced: alien Containing type locality
From editor or global species database
Description Robust sub-rectangular species of the non-B, dictyon group (WHaTLEY et al. 1984). Anterior margin asymmetrically rounded (L) to evenly rounded (R). Posterior margin truncated in R, asymmetrically rounded in L. Thick marginal rims, anterior of which with short spines, posterior bearing few spines medially. Dorsal margin sinuous due to the pronounced dorsal carina and the hinge ear. Ventral margin straight. Greatest length below mid-height, greatest height at anterior cardinal angle. Well developed reticulum with pronounced muri some of which are suppressed. Asa resuh, many fossae are fused, especially posteriorly. Antero-ventral carina strong or suppressed near the ocular ridge area. Postero-dorsal carina short, extending from the posterior rito till immediately above the MS zone, where it is deflected into the irregular bridge structure. Each solum of the fossae is covered with small circular pits arranged in chains, surface of muri smooth as is the exterior surface above the MS attachment point. Normal pores borh in conjunctive and disjunctive positions. They are sieve-type but the sieve plate is in different positions: closer to the internal surface when they ate intramural, doser to the outer surface when they open on the soluto (Figs. 47J-K). Marginal pore-canals straight, simple, occasionally bifurcate in the ventral area, 21-27 anteriorly, 10- 13 posteriorly. In dorsal view, maximum width in the poster~ ior third at the edge of the ventral carina. Internally: dorsal margin straight, ventral margin slightly concave in the oral region. Inner lamella wide, vestibulum not developed, selvage moderately strong. Hinge holamphidont. R with stepped AT and kidney-shaped PT, median groove smooth with a small, round socket opening behind the AT. L with deep AS and adjacent round tooth, median bar smooth and widening at both ends. PS wide with peculiar oblique incisions inside. Adductor MS consist of a vertical row of four: the upper most oval, the second uppermost dongate and the lower two smaller, elongate and close to each other. Two frontal scars, the lowermost drop-shaped and larger than the round posterior one. In juveniles, the younger the instars the more the secondary reticulation expands on the muri. In many specimens, a horizontal median carina is present, parallel to the other two. The hinge is paramphidont with faintly lobate PT. [details]Diagnosis Medium-sized Bradleya with thick muri. Fossae fused in the posterior area. Postero-dorsal and anteroventral carinae pronounced. Weak ocular ridge Surface of the fossae covered with a secondary reticulation, formed by small chains of circular pits. [details] Etymology From the Greek adjective mesembrinos = Southern; referring to the Southern Ocean where this species has been found. [details] |
