SKELETAL SUPPORTS OF THE MEDIAN FINS OF FISHES
SKELETAL SUPPORTS OF THE MEDIAN FINS OF FISHES
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DOI：
10.1002/jmor.1050760305
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发表时间：
1945-01-01
影响因子：
1.5
通讯作者：
EATON, TH
中科院分区：
文献类型：
--
作者：
EATON, TH
鳍条和他们的更深的支持的同源性和关系进行了审查，和术语减少。皮纹由两种不同的成分组成，单独或以各种方式组合：（1）角毛，胚胎和生殖配对的杆，可能与鳞片行有关系，也可能没有关系，通常出现在介形动物到硬骨鱼类;（2）鳞片行，倾向于与前者对齐，融合或取代前者;在后一种情况下，它们成为鳞毛。鳍肢是较深的部分，通过鳍肌肉与鳍条有特定的关系;该术语包括“桡鳍”和“基鳍”。“上鳍和下鳍是神经和血棘的分离部分，与鳍没有直接关系。鳍褶理论的证据被认为是不充分的或虚幻的。通常提供的化石证据受到其他解释的影响，而解剖学和胚胎学的“证据”则归因于身体和四肢的不同生长速度，以及其他在脊椎动物胚胎中广泛存在但没有系统发育意义的相关条件。这表明鳍的出现与介形动物的中刺和成对刺有关。
Homologies and relationships of fin rays and their deeper supports are reviewed, and the terminology reduced. Dermal rays consist of 2 different components, alone or variously combined: (1) cerato-trichia, embryonically and primitively paired rods, which may or may not attain relationship with scale rows, and which are of general occurrence from Ostracoderms to Osteichthyes; (2) scale rows, which tend to align with, fuse with, or replace the preceding; in the latter case they become lepidotrichia. Pterygiophores are deeper pieces with specific relationship to fin rays by way of fin muscles; the term includes "radials" and "basals." Supraneurals and infrahaemals are detached elements of neural and haemal spines having no direct relation to fins. Evidence on the fin-fold theory is considered to be inadequate or illusory. The fossil evidence usually offered is subject to other interpretation, while the anatomical and embryological "evidence" is attributed to differential growth rate of body and limbs, and other correlated conditions widespread in vertebrate embryos but without phylogenetic significance. It is suggested that fins arose in connection with median and paired spines in Ostracoderms.