Chen Xing-Yu, Arratia Gloria
Department of Pharmacology at Toxicology and Museum of Natural History, University of Kansas, Lawrence, Kansas 66045.
Institut für Paläontologie, Museum für Naturkunde der Humboldt Universität, D-10115 Berlin, Germany.
J Morphol. 1996 May;228(2):127-144. doi: 10.1002/(SICI)1097-4687(199605)228:2<127::AID-JMOR2>3.0.CO;2-2.
Studies of the skin with scanning electron microscopy (SEM) reveal a diverse morphology in breeding tubercles among species of Phoxinus. Based mainly on the fine structure of the surface of tubercles, nine morphotypes, coded as letters A-I, occur in Phoxinus. Most of the morphotypes are common to all Phoxinus species, but type E is present only on the dorsum of the head of P. phoxinus, type H on the breast scale of female P. phoxinus, and type I on the pectoral fin in P. erythrogaster. Multicellular breeding tubercles bearing unicellular projections, identified as unculiferous tubercles are found in type H and probably types F and G. The distribution of tubercles on head, body, and fins is described and compared among Phoxinus species. Breeding tubercles in Phoxinus and other minnow genera are compared in order to interpret the phylogenetic implication of the tuberculation in Phoxinus. The deeply embedded breast scales and the breeding tubercles on their apical margins, and a series of tubercles on the apical margins of lateral scales of the caudal peduncle in breeding males of Phoxinus species, are the characters supporting the monophyly of the genus. © 1996 Wiley-Liss, Inc.
利用扫描电子显微镜（SEM）对麦穗鱼属物种的皮肤进行研究，发现繁殖瘤的形态多样。主要根据瘤表面的精细结构，麦穗鱼属中出现了九种形态类型，编码为字母A - I。大多数形态类型在所有麦穗鱼属物种中都很常见，但E型仅出现在麦穗鱼头部的背部，H型仅出现在雌性麦穗鱼的胸鳞上，I型仅出现在红腹麦穗鱼的胸鳍上。在H型以及可能的F型和G型中发现了带有单细胞突起的多细胞繁殖瘤，被鉴定为具柄瘤。描述并比较了麦穗鱼属物种头部、身体和鳍上瘤的分布情况。对麦穗鱼属和其他米诺鱼属中的繁殖瘤进行了比较，以解释麦穗鱼属中瘤化现象的系统发育意义。麦穗鱼属繁殖雄性个体中深深嵌入的胸鳞及其顶端边缘的繁殖瘤，以及尾柄侧鳞顶端边缘的一系列瘤，是支持该属单系性的特征。© 1996威利 - 利斯公司。
