Fishes of the World |
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Strana 40
SUBGRADE ELASMOBRANCHIOMORPHI Although placoderms share some
characteristics with chondrichthyans , there are also many basic differences , and
the two groups cannot be closely related . Their placement together in this ...
SUBGRADE ELASMOBRANCHIOMORPHI Although placoderms share some
characteristics with chondrichthyans , there are also many basic differences , and
the two groups cannot be closely related . Their placement together in this ...
Strana 68
+ Class ACANTHODII True bone present ; jaws formed by palatoquadrate and
Meckel ' s cartilage , both ossified ; mandibular arch ( palatoquadrate ) , probably
closely associated with hyoid arch , with the spiracular gill cleft ( homologous with
...
+ Class ACANTHODII True bone present ; jaws formed by palatoquadrate and
Meckel ' s cartilage , both ossified ; mandibular arch ( palatoquadrate ) , probably
closely associated with hyoid arch , with the spiracular gill cleft ( homologous with
...
Strana 118
This muscle , probably homologous with the trapezius of tetrapods , can be
present or absent in closely related groups , for example , it is present in Dallia
but absent in Umbra and Novumbra , and it is present in some species of
Galaxias but ...
This muscle , probably homologous with the trapezius of tetrapods , can be
present or absent in closely related groups , for example , it is present in Dallia
but absent in Umbra and Novumbra , and it is present in some species of
Galaxias but ...
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Obsah
INTRODUCTION | 1 |
PHYLUM CHORDATA | 21 |
Subdivision Halecomorphi | 86 |
Autorské práva | |
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Časté výrazy a frázy
absent adipose fin adults Africa anal fin ANTARCTIC ARCTIC areas Atlantic Australia barbels body bone brackish branched branchiostegal rays Bull CAPRICORN caudal fin characters CIRCLE classification closely compressed continuous cycloid derived developed Distribution dorsal and anal dorsal fin eastern eight elongate EQUATOR extending eyes Family fin rays fishes five fossil four freshwater genera e.g. genus gill openings given gives head Indian known lack lateral line living lower Marine maxilla Maximum length mouth nine North occur oceans Order organ origin Pacific pairs pectoral fin pelvic fins placed plates present primarily primitive probably rarely recognized region relationships relatively Rosen scales seas separate seven short side similar single snout soft rays South America southern species spines SUBFAMILY Suborder swim bladder tail teeth teleosts Three genera TRIBE tropical usually vertebrae western Zealand Zool