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Material in the scales of lobe-finned fishes
Cosmine is a spongy, bony material that makes up the dentine-like layers in the scales of the lobe-finned fishes of the class Sarcopterygii. Fish scales
Cosmine
Class of lobe-finned fishes
a mineralized tissue called cosmine, but in post-Devonian lungfishes, the skull roof lies beneath the skin and the cosmine covering is lost. All modern
Lungfish
Small rigid plate that grows out of an animal's skin
dentine-like material called cosmine. The upper surface is keratin. The coelacanth has modified cosmoid scales that lack cosmine and are thinner than true
Scale_(zoology)
Hard skeletal covering of fish
supplied with blood vessels, followed by a complex dentine-like layer called cosmine with a superficial outer coating of vitrodentine. The upper surface is
Fish_scale
Clade of lobe-finned fish
scaloids, consisting of lamellar bone surrounded by layers of vascular bone, cosmine (similar to dentin), and external keratin. The physical structure of tetrapodomorphs
Sarcopterygii
Class of lobe-finned fishes
coelacanths are generally circular and overlapping, and lack ganoine or cosmine. These scales are either ornamented with denticles, tubercles or ridges
Coelacanth
Extinct genus of tetrapodomorphs
large spiracular openings on top of the skull, with a distinct down-folded cosmine-covered lamina of bone present on the tabular bone. This indicated its
Gogonasus
Extinct genus of bony fishes
These pores are also distinct from those of Psarolepis which have a porous cosmine-like surface. Choo, Brian; Zhu, Min; Qu, Qingming; Yu, Xiaobo; Jia, Liantao;
Sparalepis
Extinct genus of bony fishes
Psarolepis was made of plates containing a layer of porcelain-like cosmine. Because the cosmine layer obscures the suture lines of the skull, it is difficult
Psarolepis
Extinct family of tetrapodomorphs
their bodies were covered in rhomboid scales that possessed a layer of cosmine (a porous, mineralised tissue). The scales however lacked the peg-and-socket
Megalichthyidae
distribution of cosmine-related characters in bony fishes, reporting evidence of sparse distribution of characters associated with cosmine among early bony
2026_in_paleoichthyology
Extinct genus of fishes
Upper Devonian (Famennian) of Pennsylvania, U.S.A., and a report on the cosmine-covered osteolepiform fossils of the Catskill Formation". Journal of Vertebrate
Megalichthys
Extinct genus of bony fishes
Although Megamastax resembles sarcopterygians (lobe-finned fish) in having cosmine on its jaws, coronoid plates, a prearticular bone, and a biconcave glenoid
Megamastax
Extinct genus of lobe-finned fish
its head were covered in a thin layer of spongy, bony material called cosmine. This layer contained canals that were connected to sensory cells deeper
Osteolepis
Extinct family of tetrapodomorphs
becoming more symmetrical externally in later forms. The scales lacked the cosmine layer found in more primitive tetrapodomorphs. Most of the body was covered
Tristichopteridae
Group of cartilaginous fish
of the unique, hypermineralized tissue whitlockin (also called kosmin, cosmine, or pleromin) which is composed of the mineral whitlockite rather than
Holocephali
Extinct genus of bony fishes
ISSN 0311-5518. S2CID 134883695. Schultze, Hans-Peter (2016). "Scales, Enamel, Cosmine, Ganoine, and Early Osteichthyans". Comptes Rendus Palevol. 15 (1–2): 83–102
Andreolepis
Unit of sedimentary rock in the US
Upper Devonian (Famennian) of Pennsylvania, U.S.A., and a Report on the Cosmine-Covered Osteolepiform Fossils of the Catskill Formation". Journal of Vertebrate
Catskill_Formation
Extinct genus of fishes
oldest coelacanth. Styloichthys is characterized by large pores on the cosmine surface. These pores are often spoon-shaped and arranged in parallel grooves
Styloichthys
Marvel Feature, with issue #12, is canceled by Marvel. First issue of Cosmine (Ediperiodci), Italian sexy SF series, written by Silverio Pisu. Millie
1973_in_comics
Species of fish
well as Chondrostean. Ganoid scales are modified cosmoid scales with the cosmine replaced with dentine and the surface vitrodentine replaced with ganoine
Polypterus_bichir
information on the anatomy of Styloichthys changae, and study the evolution of cosmine in lobe-finned fishes. Ferrante & Cavin (2025) study the phylogenetic relationships
2025_in_paleoichthyology
Richard Lund (2015). "Two new Actinopterygii (Vertebrata, Osteichthyes) with cosmine from the Bear Gulch Limestone (Heath Fm., Serpukhovian, Mississippian)
2015_in_paleoichthyology
Paleontological site in Montana, USA
Richard (2015). "Two new Actinopterygii (Vertebrata, Osteichthyes) with cosmine from the Bear Gulch Limestone (Heath Fm., Serpukhovian, Mississippian)
Bear_Gulch_Limestone
Extinct genus of fishes
unknown how many nasal bones make up the series due to the presence of a cosmine cover on the bones. Lateral to these bones are the supraorbitals which
Palatinichthys
Extinct genus of tetrapodomorphs
Eusthenodon possesses proportionately large, distinctively round scales without cosmine that exhibit a reticular pattern of ridges with rare appearance of independent
Eusthenodon
Upper Devonian (Famennian) of Pennsylvania, U.S.A., and a report on the cosmine-covered osteolepiform fossils of the Catskill Formation". Journal of Vertebrate
2020_in_paleoichthyology
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