Die Bauchschuppen vonMoythomasia nitida Gross (Pisces, Actinopterygii)

Jessen, Hans

doi:10.1007/bf02990148

Cited by 6 publications

(7 citation statements)

References 1 publication

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“…The variation in scale morphology is consistent with that described in other pataeoniseoids (Gross t953;Jessen 1972;Gardiner 1984;Long 1988;Esin 1990;Burrow 1994). Esin (1990) stated that certain morphological characteristics remain consistent on scales from different parts of the fish body, especially the form and character of dissections of the anterior margin of the free field.…”

Section: Discussionsupporting

confidence: 82%

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Scale morphology of the Late Devonian palaeoniscoidMoythomasia durgaringaGardiner and Bartram, 1977

Trinajstic¹

1999

Alcheringa: An Australasian Journal of Palaeontology

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Section: Discussionsupporting

confidence: 82%

“…A detailed study ofMoythomasiaperforata, M. nitida and M. striata was presented by Gross (1953), who illustrated part of the lateral body squamation of all three fish. In addition, Jessen (1972) described the squamation of the abdominal region of M. nitida. Gardiner (1984) study does not describe or illustrate the complete squamation of these palaeoniscoids.…”

mentioning

confidence: 98%

Scale morphology of the Late Devonian palaeoniscoidMoythomasia durgaringaGardiner and Bartram, 1977

Trinajstic¹

1999

Alcheringa: An Australasian Journal of Palaeontology

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“…Such a proportion of the parietal relative to the postparietal is clearly more similar to that of Middle±Late Devonian actinopterygians (e.g. Cheirolepsis, Howqualepis, Mimia, Moythomasia, and Osorioichthys; Jessen 1968;Pearson 1982;Gardiner 1984;Long 1988;Taverne 1997), than to that of the Lower Devonian Dialipina (Schultze 1992), where the postparietal is longer than the parietal. Laterally, the supratemporal and intertemporal are almost certainly present, but it is uncertain if the dermosphenotic is included in the skull-roof.…”

Section: Text-®gures 12±14mentioning

confidence: 80%

“…Devonian actinopterygians from South America were hitherto represented by just a few (Janvier and Suarez-Riglos 1986), an isolated cleithrum from the Givetian of the Sica Sica Formation of the Bolivian Altiplano (Gagnier et al 1989), and isolated scales from deposits of supposed Late Famennian age in eastern Brazil (Janvier and Melo 1987). The Bolivian specimens belong to a rather generalized actinopterygian type, as represented by the Late Devonian genera Moythomasia and Mimia (Jessen 1968;Gardiner 1984). All the actinopterygian remains described here are from the clayey mudstone and claystone levels of Potrero Rinco Ân 1.…”

Section: Text-®gures 12±14mentioning

confidence: 99%

Devonian Vertebrates From Colombia

Janvier¹,

Villarroel

2000

Palaeontology

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ABSTRACT. Vertebrate remains are reported from the Emsian±Eifelian Floresta Formation and the Late Devonian (?Frasnian) Cuche Formation of north-eastern Colombia. The material from the Floresta Formation is associated with a marine invertebrate fauna and includes an arthrodire and probably a rhenanid. Several vertebrate-bearing localities are recorded from the Cuche Formation; vertebrates occur with plant remains and lingulid fragments. They include an acanthodian (Cheiracanthoides? sp.), a chondrichthyan (Antarctilamna? sp.), placoderms (Bothriolepis sp., Asterolepis? sp. and an undetermined groenlandaspidid or primitive brachythoracid arthrodire), a stegotrachelid actinopterygian, and three sarcopterygians (a cosmine-covered form tentatively referred to an osteolepidid, the porolepiform Holoptychius sp., and the rhizodontid Strepsodus? sp.). This assemblage suggests a Late Frasnian age and is surprisingly similar to Late Devonian vertebrate assemblages found in similar facies of Europe and North America, notwithstanding the presence of the Gondwanan chondrichthyan Antarctilamna?.

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“…The earliest undisputed actinopterygians are from the middle to late Devonian (Janvier, 1996). Articulated remains of taxa such as Cheirolepis (Pearson & Westoll, 1979) and Moythomasia (Gross, 1950; Jessen, 1968, 1972; Gardiner, 1984) have palaeoniscoid scales (Fig. 12B,C), consisting of a superficial region of multilayered ganoine covering a region of dentine, and a thick basal plate of vascularized bone (Goodrich, 1907; Ørvig, 1978a,b,c; Sire, 1990).…”

Section: Origin Evolution and Diversity Of The Integumentary Skeletonmentioning

confidence: 99%

Origin and evolution of the integumentary skeleton in non‐tetrapod vertebrates

2009

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Most non-tetrapod vertebrates develop mineralized extra-oral elements within the integument. Known collectively as the integumentary skeleton, these elements represent the structurally diverse skin-bound contribution to the dermal skeleton. In this review we begin by summarizing what is known about the histological diversity of the four main groups of integumentary skeletal tissues: hypermineralized (capping) tissues; dentine; plywood-like tissues; and bone. For most modern taxa, the integumentary skeleton has undergone widespread reduction and modification often rendering the homology and relationships of these elements confused and uncertain. Fundamentally, however, all integumentary skeletal elements are derived (alone or in combination) from only two types of cell condensations: odontogenic and osteogenic condensations. We review the origin and diversification of the integumentary skeleton in aquatic non-tetrapods (including stem gnathostomes), focusing on tissues derived from odontogenic (hypermineralized tissues, dentines and elasmodine) and osteogenic (bone tissues) cell condensations. The novelty of our new scenario of integumentary skeletal evolution resides in the demonstration that elasmodine, the main component of elasmoid scales, is odontogenic in origin. Based on available data we propose that elasmodine is a form of lamellar dentine. Given its widespread distribution in non-tetrapod lineages we further propose that elasmodine is a very ancient tissue in vertebrates and predict that it will be found in ancestral rhombic scales and cosmoid scales.

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Die Bauchschuppen vonMoythomasia nitida Gross (Pisces, Actinopterygii)

Cited by 6 publications

References 1 publication

Scale morphology of the Late Devonian palaeoniscoidMoythomasia durgaringaGardiner and Bartram, 1977

Scale morphology of the Late Devonian palaeoniscoidMoythomasia durgaringaGardiner and Bartram, 1977

Devonian Vertebrates From Colombia

Origin and evolution of the integumentary skeleton in non‐tetrapod vertebrates

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