Les formations bioconstruitesdu Crétacé inférieur d'estremadura (Portugal)

Rey, Jacques

doi:10.1016/s0016-6995(79)80053-4

Cited by 22 publications

(50 citation statements)

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“…In reference to previous classifications, the tree confirms the validity of the suborders Micrasterina and Hemiasterina erected by Fischer (1966), the paraphyletism of the Toxasterina and Toxasteridae suggested by Smith (1984), the diphyletism of the family Hemiasteridae (Néraudeau 1990(Néraudeau , 1994b, and the clade Macraster plus Douvillaster (Neumann 1999). On the other hand, the tree suggests that the genus Heteraster is monophyletic rather than polyphyletic, as implied by the evolutionary scenarios of Devriès (1960a) and Rey (1972). Our phylogenetic hypothesis leads us to reconsideration of the composition of several groupings at the generic or family levels (Text- fig.…”

Section: Basal Apomorphiesmentioning

confidence: 82%

“…Six species were retained to represent Heteraster: H. corvensis, as the most primitive member of the genus [this species, like some other species of Portuguese Heteraster, was originally classified as a Toxaster, but is now considered to be a true Heteraster (Rey 1972)]; H. texanus, for American species; TABLE 1. List of spatangoid genera cited from the Lower Cretaceous and the Cenomanian.…”

Section: P a L A E O N T O L O G Y V O L U M E 4mentioning

confidence: 99%

“…semi-petaloid paired ambulacra, ethmophract apical system), including the absence of characteristics (no fascioles). Former authors have identified Toxaster lineages on stratigraphic and phenetic grounds (Lambert 1931;Devriès 1960a;Rey 1972;Masrour 1987): (1) T. granosus -T. granosus kiliani -T. lorioli; (2) T. seynensis -T. collegnoi -T. radula; and (3) T. maurus -T. villei -T. peroni (the so-called 'cavipetal' group of Lambert). The trends recorded within these lineages mostly involve changes in general shape and ambulacra.…”

Section: Basal Apomorphiesmentioning

confidence: 99%

“…Devriès (1955Devriès ( , 1960a and Rey (1972) accurately described heterogeneity in the paired petals as intraspecific variations in some Lower Cretaceous species: Heteraster oblongus, H. pomeli, H. peroni, H. tissoti, M.? transians, Toxaster villei, T. peroni, T. collegnoi and Mecaster brahim.…”

Section: Basal Apomorphiesmentioning

confidence: 99%

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Phylogeny of Early Cretaceous spatangoids (Echinodermata: Echinoidea) and taxonomic implications

Villier¹,

Néraudeau

Clavel³

et al. 2004

Palaeontology

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ABSTRACT. A phylogenetic analysis of 36 species provides a test for the taxonomy and the history of Early Cretaceous spatangoids. Most taxonomic units from genera to suborders are consistent with the proposed phylogenetic framework. We retain Hemiasterina, Micrasterina, Hemiasteridae, Schizasteridae, Hemiaster, Heteraster, Mecaster, and Periaster as original monophyletic groups. However, all of these clades originate without the classical apomorphies normally ascribed to them. We suggest a revision of their diagnoses and of the generic attributions of basal species. Some illdefined, 'primitive', and paraphyletic taxa are recognised: Toxaster, Epiaster, Palhemiaster, and Toxasteridae. Even if they do not have phylogenetic meaning, they are retained here, pending a more complete revision.KEY WORDS: Spatangoida, Echinoidea, phylogeny, systematics, Cretaceous.T H E phylogeny of higher-level taxa of echinoids (order and above) is now considered to be robust (Smith 1981(Smith , 1984. In this framework, the order Spatangoida appears as a well-supported monophyletic group, with its first occurrence in the lowermost Cretaceous (Berriasian). While the monophyly of Spatangoida is largely consensual, the precise origin of the order is still unclear and has been the subject of several hypotheses in the last 50 years. Eble (2000) noted the lack of phylogenetic information for early Spatangoida and Holasteroida. Roots of these two orders are generally sought in disasteroid-like ancestors. Beurlen (1934) and Mortensen (1950) proposed Metaporinus as the ancestor of the Spatangoida. However, this hypothesis implied a reversion to a compact structure of the apical system because the first Disasteroida had already evolved by extension and disjunction of the apical system. Durham and Melville (1957) rooted the Spatangoida within the Galeropygidae. Their alternative hypothesis excluded the reversion but implied a stratigraphical gap of more than 50 myr. Later, Durham (1966) suggested that the Holasteroida, Spatangoida and Cassiduloida arose from a common ancestor at the beginning of the Jurassic. Afterwards, most authors retained the hypothesis of Devriès (1960a) that holasteroids and spatangoids both arose from disasteroids (Fischer 1966;Mintz 1966; Smith 1981 Smith , 1984. According to Devriès (1960a) the first spatangoid is Toxaster laffittei from the Berriasian. This species displays transitional features between Disasteroida and Spatangoida, such as a compact apical system and protamphisternous plastron. Other transitional forms to the more derived Spatangoida are found in nominal species such as Toxaster holasteroides and T. africanus, that show a progressive compaction of the apical system to an ethmophract pattern. However, consensus is still lacking. For example, Clavel (in Jablonski and Bottjer 1990) rejected Toxaster laffittei as a Spatangoida and moved it to Holasteroida as Holaster cordatus. In this latter hypothesis, Proholaster auberti is a good candidate for ancestor of the Spatangoida. Smith (1984) proposed an e...

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Section: Basal Apomorphiesmentioning

confidence: 82%

Section: P a L A E O N T O L O G Y V O L U M E 4mentioning

confidence: 99%

Section: Basal Apomorphiesmentioning

confidence: 99%

Section: Basal Apomorphiesmentioning

confidence: 99%

See 2 more Smart Citations

Phylogeny of Early Cretaceous spatangoids (Echinodermata: Echinoidea) and taxonomic implications

Villier¹,

Néraudeau

Clavel³

et al. 2004

Palaeontology

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“…As in Kullberg et al [25], the western Iberian margin constitutes a passive margin during the late Berriasian-late Aptian, gradually creating full marine conditions southwards by the opening of the shelf to the Atlantic Ocean [26] with a rapid rise in relative sea-level [6,27].…”

Section: Resultsmentioning

confidence: 81%

New Data about the Paleo Environment of the Papo-Seco Formation (Lower Cretaceous) of Southern Portugal

Figueiredo¹,

Strantzali²,

Rosina³

et al. 2016

JESE

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New vertebrate and invertebrate remains are reported from the basal deposits (marls, sands and gravels) of Papo-Seco Formation (Lower Barremian, Lower Cretaceous) of Areias do Mastro, nearby Cabo Espichel, Sesimbra, south of Lisbon. The studied layers were formed in an environment of shallow-marine features (lagoon, estuary). Recent paleontological inspection generated several vertebrate and invertebrate remains, including shells and trace fossils (casts and molds) of gastropods and bivalves; after examination, there were identified bones and teeth of fish, crocodiles, dinosaurs, pterosaurs and turtle shell fragments. The new data constitute an important contribution to the knowledge of vertebrate paleo-diversity for the environment during the Lower Cretaceous of Portugal.

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Distribution of gastropods within the Cretaceous Tethyan realm

Kollmann

1992

New Aspects on Tethyan Cretaceous Fossil Assemblages

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Les formations bioconstruitesdu Crétacé inférieur d'estremadura (Portugal)

Cited by 22 publications

References 1 publication

Phylogeny of Early Cretaceous spatangoids (Echinodermata: Echinoidea) and taxonomic implications

Phylogeny of Early Cretaceous spatangoids (Echinodermata: Echinoidea) and taxonomic implications

New Data about the Paleo Environment of the Papo-Seco Formation (Lower Cretaceous) of Southern Portugal

Distribution of gastropods within the Cretaceous Tethyan realm

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