KSIĄŻKI POWIĄZANE ZE SŁOWEM «COSMOID»
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1
Hyman's Comparative Vertebrate Anatomy
Thereafter a new group, the cosmoid fishes, was recognized as having equal
taxo- nomic status with the other major fish groups. The various scale types of
these fishes, as first categorized by Agassiz, were now envisioned as forming a
direct ...
2
The Diversity of Fishes: Biology, Evolution, and Ecology
2 Cosmoid scales were present in fossil coelacanths and fossil lungfishes. The
scales of Recent lungfishes are highly modified by loss of the dentine layer.
Cosmoid scales are similar to placoid scales and probably arose from the fusion
of ...
Gene Helfman, Bruce B. Collette, Douglas E. Facey,
2009
Three-dimensional reconstruction, (a) Cosmoid scale of Megalichthys. (b)
Palaeoniscoid scale of Eurynotus. (c) Lepisosteoid scale of Lepisosteus. (a, b, c
adapted from Goodrich, 1907.) (d) Odontocomplex topping a scale of
Plegmolepis.
Non- placoid scales are basically of three types: A. Cosmoid scale. B. Ganoid
scale. C. Bony ridge scale. Cosmoid scale The cosmoid scales are found in the
extinct "Crossopterygean and Depnoi". The external layer of the scale is thin and
...
The only living member with cosmoid scales is represented by the genus
Latimeria. Cosmoid scales are regarded as the precursor of the ganoid, placoid
and the bony scales of the modern teleosts. Each cosmoid scale consists of
following ...
Nonplacoid scales are basically of three kinds-cosmoid, ganoid, and bony-ridge.
The last term is proposed to fill a gap in the story (in need of refinement) which
has been developed concerning scales over the past century. In addition, bony ...
7
Handbook of Micromechanics and Nanomechanics
The "primitive" cosmoid and ganoid scales are bulky, bony scales which offer
very effective protective properties, through a multilayered structure capable of a
variety of dissipative mechanisms [8]. Over the course of evolution the reduction
of ...
Shaofan Li, Xin-Lin Gao,
2013
8
Skeletal Biomineralization: Pattern, Processes, and ...
It is from rhomboid-type scales that cosmoid (Sarcopterygii) and ganoid (
Actinopterygii) scales differentiated. The main differences in these types deal with
the organization of the dentine and enamel. Rhomboid scales have a dorsal peg
which ...
In contrast to the actinopterygians, the dipnoans and crossopterygians are
characterized by (1) paired fins having a pronounced, fleshy, lobed base that
contains robust skeletal elements, and (2) cosmoid scales. The cosmoid scale is
formed ...
William E. Duellman,
1994
10
Multicellular Animals: Order in Nature - System Made by Man
Two forms of the dermal scales play a part in the characterization of the highest-
ranking adelphotaxa of the Osteognathostomata - the ganoid scales of the
Actinopterygii and the cosmoid scales of the fossil Sarcopterygii (SCHULTZE
1977).