By Maria Luiza Beçak, Willy Beçak, Franklin L. Roberts, Robert N. Shoffner, E. Peter Volpe (auth.), Maria Luiza Beçak, Willy Beçak, Franklin L. Roberts, Robert N. Shoffner, E. Peter Volpe (eds.)

Since the ebook of the 1st Atlas of Mammalian Chromosomes in 1967 the continual compilation of mammalian karyotypes has develop into an invaluable tool in cytologic and taxonomic reports. Technical advances in getting ready mitotic cells from nonmammalian vertebrates have given that allowed a greater comparability of taxa in fishes, amphibia, reptiles, and birds. In those fields the literature can also be generally scat­ tered; and it has develop into tough to survey such info, released in addition to unpublished, by means of nonspecialists. those have been one of the purposes for the hot recreation of compiling a chromosome atlas for nonmammalian vertebrates. An annual book is deliberate with presentation of among 10 and 15 karyotypes from every one type. during this moment quantity, fifty two species are awarded. For comfort in destiny colation, the numbering procedure employs category abbreviations, viz. , P-Pisces, Am-Amphibia, R-Reptilia, and Av-Aves. inside each one type, the numbers are unavoidably consecutive. more often than not the karyotypes are laid out following the layout hired in An Atlas of Mammalian Chromosomes. at any time when attainable either sexes are represented, although sexual chromosomal dimorphism isn't (currently) glaring. whilst the intercourse chromosomes are identified, they're so indicated by means of traditional nomenclature (XX/XY or ZW /ZZ). within the karyotypes of birds the so-called microchromosomes are grouped jointly on the finish with no an try at whole enumeration, that's shortly most unlikely. they're often regarded as acrocentrics, yet a couple of are rather biarmed.

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Extra resources for Chromosome Atlas: Fish, Amphibians, Reptiles, and Birds: Volume 2

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Order: ANURA Family: BUFONIDAE Bufo valliceps (Wiegmann) (Gulf Coast toad) 2n=22 Volume 2, Folio Am-13, 1973 Order: Family: ANURA BUFONIDAE Bufo valliceps Wiegmann (Gulf Coast toad) 2n AUTOSOMES: = 22 8 large metacentrics and submetacentrics 4 medium-sized metacentrics 10 small metacentrics and submetacentrics SEX CHROMOSOMES: No sex dimorphism The largest pair of chromosomes in the complement bears a prominent secondary constriction in the long arm near the centromere. The specimens were collected in Orleans Parish, Louisiana, USA, by Mr.

Diploid-polyploid cryptic species pairs: a possible clue to evolution by polyploidization in anuran amphibians. Cytogenetics 11: 7-24, 1972. Order: ANURA Family: HYLIDAE Hyla versicolor LeConte (Eastern gray treefrog) 2n = 48 J 1 .. a. II IIII If II • ••• Volume 2, Folio Am-16, 1973 © 1973 by Springer-Verlag New York Inc. Order: ANURA Family: PELOBATIDAE Scaphiopus bombifrons (Cope) (Plains spadefoot toad) 2n=26 Volume 2, Folio Am-17, 1973 Order: ANURA Family: PELOBATIDAE Scaphiopus bombifrons (Cope) (Plains spadefoot toad) 2n AUTOSOMES: 8 2 8 8 SEX CHROMOSOMES: large large small small = 26 metacentrics and submetacentrics subtelocentrics submetacentrics metacentrics No sex dimorphism One pair of small submetacentric chromosomes bears a prominent secondary constriction in the long arm below the centromere.

Nat. 12: 239-248, 1970. 3) Earley, E. : Karyotypes of fifteen anuran species, with particular reference to secondary constrictions. D. thesis, Tulane University, New Orleans, Louisiana, 1971. Order: ANURA Family: PELOBATIDAE Scaphiopus bombifrons (Cope) (Plains spadefoot toad) 2n = 26 • Volume 2, Folio Am-17, 1973 © 1973 by Springer-Verlag New York Inc. Order: ANURA Family: PELOBATIDAE Scaphiopus couchi (Baird) (Couch's spadefoot toad) 2n=26 Volume 2, Folio Am-18, 1973 Order: ANURA Family: PELOBATIDAE Scaphiopus couchi Baird (Couch's spadefoot toad) 2n AUTOSOMES: 8 4 6 8 SEX CHROMOSOMES: large large small small = 26 metacentrics and submetacentrics subtelocentrics submetacentrics metacentrics No sex dimorphism The smallest submetacentric chromosome bears a faint secondary constriction in the short arm above the centromere.

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Chromosome Atlas: Fish, Amphibians, Reptiles, and Birds: by Maria Luiza Beçak, Willy Beçak, Franklin L. Roberts, Robert
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