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Cybium,
Revue
Internationale dIchtyologie |
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Histology and morphology of the scales in some extinct and extant teleosts François J. MEUNIER (1, 2) & Paulo M. BRITO (1, 3) (1) Unité
0403, Biodiversité et Dynamique des Communautés aquatiques,
Département des Milieux et Peuplements aquatiques, Muséum
national dHistoire naturelle, 43 rue Cuvier, 75231 Paris, FRANCE. Abstract.
- Scale morphology and histology of some fossil and extant teleosts,
as well as some stem group teleosts such as Pachycormiforms, are compared.
Basal teleosts have lepidosteoid type scales, although cycloid scales
appear at the Leptolepis coryphaenoides level. Pachycormiforms
have mainly lepidosteoid scales, but amioid type scales also occur within
this clade, confirming that pachycormiforms are not teleosts. An osteoglossid
type of scale is defined, based on morphological and histological characters
and is considered a derived feature within teleosts. |
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