The ontogeny of appendages and carapace of <i>Neonesidea schulzi</i> (Ostracoda: Bairdiidae) from the Red Sea coast, Egypt

Yousef, Ebtesam A.; Moustafa, Alaa Y.

doi:10.1080/07924259.2017.1339641

Cited by 1 publication

(2 citation statements)

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“…Although the material is not abundant in Wei et al (1983) and in the present work, changes in the elongation of the carapaces as well as a lowering of the AB position are observed from A-1 to Adult stages. Changes in the elongation of the carapaces between these stages have also been recognized for several modern Bairdiidae (Smith and Kamiya, 2002;Yousef and Moustafa, 2017).…”

Section: Systematic Paleontology (By Marie-béatrice Forel)mentioning

confidence: 72%

“…The A-3 stage thus appears as an overall important stage for the establishment of sexual dimorphism in fossil Bairdioidea. Interestingly, the Anlangen of copulatory organs of modern Bairdioidea [Neonesidea oligodentata (Kajiyama, 1913) and Neonesidea schulzi (Hartmann, 1964)] form in the A-1 stage while previous stages are only affected by the formation of appendages and changes in their chaetotaxy (Smith and Kamiya, 2002;Yousef and Moustafa, 2017). This discrepancy might be related to adaptation mechanisms to peculiar and still unconstrained conditions.…”

Section: Systematic Paleontology (By Marie-béatrice Forel)mentioning

confidence: 99%

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Digging into the ancestral stocks of Jurassic lineages: ostracods (Crustacea) from Carnian (Late Triassic) sponge mounds from the Maantang Formation (South China)

Forel¹,

Thuy²,

Wisshak³

2019

BSGF - Earth Sci. Bull.

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Microbial-sponge reef mounds of the Carnian, Late Triassic, Maantang Formation crop out along the northwestern margin of the Sichuan Basin in South China. Samples from three mounds have been investigated and their ostracod assemblages are here described for the first time. Thirty-three species are present, distributed into 19 genera, including five newly described species: Carinobairdiacabralae n. sp., Hiatobairdia senegasi n. sp., Hiatobairdiazhengshuyingi n. sp., Hungarella gommerii n. sp, Pontocyprella goussardi n. sp. While most of the encountered genera are already known from the Carnian stage worldwide, the Maantang assemblages are precursors in providing the oldest occurrences of the family Schulerideidae, typical of the Middle and Late Jurassic of Europe, and of the genus Carinobairdia, which was until now restricted to the Norian-Rhaetian interval. These records demonstrate the underestimated importance of the easternmost Tethys in the early Mesozoic evolution of marine ostracods. Some important Jurassic European taxa might have originated on the eastern margin of the Tethys during the Carnian, migrated to the western Tethys later during the Late Triassic and diversified there up to the record known for the European Jurassic. Microbioerosion trace fossil analysis of associated brachiopod shells revealed Orthogonum giganteum as the sole identifiable ichnotaxon and represents the first record of this ichnospecies in Triassic strata. The complete absence of microborings produced by phototrophic trace makers points towards aphotic depths for the deposition of the Maantang Formation, providing independent evidence suggesting that typical shallow water ostracods (Carinobairdia, Schulerideidae) radiated in relatively deep settings.

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Section: Systematic Paleontology (By Marie-béatrice Forel)mentioning

confidence: 72%

Section: Systematic Paleontology (By Marie-béatrice Forel)mentioning

confidence: 99%