Taxonomy, morphology and phylogeny of Lower Jurassic teudopseid coleoids (Cephalopoda)

Fuchs, Dirk; Weis, Robert

doi:10.1127/0077-7749/2010/0083

Cited by 24 publications

(33 citation statements)

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“…Diagnosis after Fuchs and Weis (2010).-Gladius with a distinctly pointed anterior extremity and a rounded median keel. Hyperbolar zone comparatively broad and smoothly FIGURE 12-Soft-part morphology of Cenomanian Glyphiteuthis sp.…”

Section: Family Teudopsidae Regteren Altena 1949mentioning

confidence: 99%

Diversity, Morphology, and Phylogeny of Coleoid Cephalopods from the Upper Cretaceous Plattenkalks of Lebanon–Part II: Teudopseina

Fuchs

Larson²

2011

Journal of Paleontology

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Section: Family Teudopsidae Regteren Altena 1949mentioning

confidence: 99%

Diversity, Morphology, and Phylogeny of Coleoid Cephalopods from the Upper Cretaceous Plattenkalks of Lebanon–Part II: Teudopseina

Fuchs

Larson²

2011

Journal of Paleontology

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“…The first unequivocal evidence of cirroctopods and octopods come from Late Cretaceous deposits [16,90]. Soft part morphologies suggest vampyropod affinities of Mesozoic gladiusbearing coleoids [81,[91][92][93][94]. Clear evidence of fossil teuthids is still lacking [95].…”

Section: Boxmentioning

confidence: 99%

“…Prospects & Overviews .... reduced gladius [78][79][80][81]. The fin supports of the Cirroctopoda, and the stylet-like shell vestiges of the Octopoda, are considered to represent the remains of a teudopseid gladius.…”

Section: B Krö Ger Et Almentioning

confidence: 99%

Cephalopod origin and evolution: A congruent picture emerging from fossils, development and molecules

2011

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Cephalopods are extraordinary molluscs equipped with vertebrate-like intelligence and a unique buoyancy system for locomotion. A growing body of evidence from the fossil record, embryology and Bayesian molecular divergence estimations provides a comprehensive picture of their origins and evolution. Cephalopods evolved during the Cambrian (∼530 Ma) from a monoplacophoran-like mollusc in which the conical, external shell was modified into a chambered buoyancy apparatus. During the mid-Palaeozoic (∼416 Ma) cephalopods diverged into nautiloids and the presently dominant coleoids. Coleoids (i.e. squids, cuttlefish and octopods) internalised their shells and, in the late Palaeozoic (∼276 Ma), diverged into Vampyropoda and the Decabrachia. This shell internalisation appears to be a unique evolutionary event. In contrast, the loss of a mineralised shell has occurred several times in distinct coleoid lineages. The general tendency of shell reduction reflects a trend towards active modes of life and much more complex behaviour.

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“…Interestingly, the typical tip of R. acutali n. sp. resembles the pointed anterior extremity described in the Jurassic Teudopsis bunelii Eudes-Deslongchamps, 1835, but also in Jurassic muensterellid and palaeloliginid coleoids (Fuchs and Weis, 2010;Fuchs and Larson, 2011b). The latter are assumed to be ancestral to the genus Rachiteuthis (Fuchs and Larson, 2011b).…”

Section: Genus Rachiteuthis Fuchs 2006amentioning

confidence: 91%

Gladius-bearing coleoids from the Upper Cretaceous Lebanese Lagerstätten: diversity, morphology, and phylogenetic implications

et al. 2015

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Gladius-bearing coleoids are rare in the fossil record. For the Cretaceous period, these cephalopods are mainly recorded in a few Lagerstätten in Lebanon (Haqel, Hajoula, En Nammoura, and Sahel Aalma). Here, we study 16 specimens of gladius-bearing coleoids from these Upper Cretaceous Lebanese Lagerstätten to investigate their taxonomic diversity. Besides two species that were already reported (Dorateuthis syriaca and Glyphiteuthis libanotica), one new species is identified in the Cenomanian site of Hajoula: Rachiteuthis acutali n. sp., as well as another form of Glyphiteuthis from En Nammoura. Several studied specimens exhibit well-preserved soft-part characters. Among them, we document for the first time two transverse rows of sessile suckers in D. syriaca and we confirm the absence of tentacles, as well as the presence of a crop in this species. This strongly supports the phylogenetic proximity of D. syriaca with modern vampyropods rather than with modern decabrachians. In turn, the similarity in gladius morphology between this taxon and modern squids is regarded as convergent.

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Taxonomy, morphology and phylogeny of Lower Jurassic teudopseid coleoids (Cephalopoda)

Cited by 24 publications

References 0 publications

Diversity, Morphology, and Phylogeny of Coleoid Cephalopods from the Upper Cretaceous Plattenkalks of Lebanon–Part II: Teudopseina

Diversity, Morphology, and Phylogeny of Coleoid Cephalopods from the Upper Cretaceous Plattenkalks of Lebanon–Part II: Teudopseina

Cephalopod origin and evolution: A congruent picture emerging from fossils, development and molecules

Gladius-bearing coleoids from the Upper Cretaceous Lebanese Lagerstätten: diversity, morphology, and phylogenetic implications

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