Phallus morphology in caecilians (Amphibia, Gymnophiona) and its systematic utility
نویسندگان
چکیده
منابع مشابه
Electrophoretic patterns of certain proteins in caecilians (Amphibia: Gymnophiona).
1. A maximum of 15 loci from five genera of caecilians (Amphibia: Gymnophiona or Apoda) were examined. Species include lchthyophis glutinosus, Geotrypetes seraphini, Caecilia occidentalis, Gymnopis multiplicata, and Dermophis mexicanus. 2. The data indicate that [chtkyophis (family Ichthyophiidae) is less closely related than are the other genera (members of the family Caeciliidae). Dermophis a...
متن کاملMitochondrial evidence on the phylogenetic position of caecilians (Amphibia: Gymnophiona).
The complete nucleotide sequence (17,005 bp) of the mitochondrial genome of the caecilian Typhlonectes natans (Gymnophiona, Amphibia) was determined. This molecule is characterized by two distinctive genomic features: there are seven large 109-bp tandem repeats in the control region, and the sequence for the putative origin of replication of the L strand can potentially fold into two alternativ...
متن کاملUltrastructure of the mature spermatozoa of caecilians (Amphibia: Gymnophiona).
The spermatozoa of Gymnophiona show the following autapomorphies: 1) penetration of the distal centriole by the axial fiber; 2) presence of an acrosomal baseplate; 3) presence of an acrosome seat (flattened apical end of nucleus); and 4) absence of juxta-axonemal fibers. The wide separation of the plasma membrane bounding the undulating membrane is here also considered to be apomorphic. Three p...
متن کاملPatterns of peripheral innervation of the tongue and hyobranchial apparatus in caecilians (Amphibia: Gymnophiona).
The innervation of the musculature of the tongue and the hyobranchial apparatus of caecilians has long been assumed to be simple and to exhibit little interspecific variation. A study of 14 genera representing all six families of caecilians demonstrates that general patterns of innervation by the trigeminal, facial, glossopharyngeal, and vagus nerves are similar across taxa but that the composi...
متن کاملA mitogenomic perspective on the phylogeny and biogeography of living caecilians (Amphibia: Gymnophiona).
The caecilians, members of the amphibian Order Gymnophiona, are the least known Order of tetrapods, and their intra-relationships, especially within its largest group, the Family Caeciliidae (57% of all caecilian species), remain controversial. We sequenced thirteen complete caecilian mitochondrial genomes, including twelve species of caeciliids, using a universal primer set strategy. These new...
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ژورنال
عنوان ژورنال: Bulletin of The Natural History Museum. Zoology Series
سال: 2002
ISSN: 0968-0470,1475-2980
DOI: 10.1017/s096804700200016x