Comparative gross encephalon morphology in Callichthyidae (Teleostei: Ostariophysi: Siluriformes)
نویسندگان
چکیده
منابع مشابه
Molecular phylogeny of the armored catfish family Callichthyidae (Ostariophysi, Siluriformes).
The family Callichthyidae comprises eight genera of fishes widely distributed across the Neotropical region. In the present study, sequences of the mitochondrial genes 12S rRNA, 16S rRNA, ND4, tRNAHis, and tRNASer were obtained from 28 callichthyid specimens. The sample included 12 species of Corydoras, three species of Aspidoras, two species of Brochis, Dianema, Lepthoplosternum, and Megalechi...
متن کاملCytogenetic analysis of five species of the subfamily Corydoradinae (Teleostei: Siluriformes: Callichthyidae)
In the present study, five callichthyid species belonging to the subfamily Corydoradinae were karyotyped: three species of Aspidoras and two of Corydoras. The three species of Aspidoras had the same diploid number, 2n = 46 chromosomes, similar karyotypic formulae, with most chromosomes metacentric or submetacentric, single interstitial Ag-NORs and C-band positive segments mainly found in the ce...
متن کاملAspidoras mephisto, new species: The first troglobitic Callichthyidae (Teleostei: Siluriformes) from South America
Aspidoras mephisto n. sp. is described from the Anésio-Russão cave system, upper Tocantins River basin, Goiás, Brazil. The species can be readily distinguished from its congeners by troglomorphic features and also by presenting the following combination of features: infraorbital 1 generally with well-developed ventral laminar; or moderately developed; poorly-developed serrations on posterior ma...
متن کاملDescriptive osteology of Corydoras aeneus (Siluriformes: Callichthyidae)
Both the cranial and postcranial osteology of Corydoras aeneus (Gill, 1858) is described based on the study of five adult specimens. The results were compared to the condition described for other loricarioid fishes. Most results corresponded with the expected pattern based on studies dealing with parts of the callichthyid osteology, although some differences were observed. One of these differen...
متن کاملSperm of Doradidae (Teleostei: Siluriformes).
Spermatic characteristics were studied in 10 species representing several distinct groups within the catfish family Doradidae. Interestingly, different types of spermatogenesis, spermiogenesis and spermatozoa are correlated with intrafamilial groups previously proposed for Doradidae. Semi-cystic spermatogenesis, modified Type III spermiogenesis, and biflagellate sperm appear to be unique within...
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ژورنال
عنوان ژورنال: Neotropical Ichthyology
سال: 2018
ISSN: 1982-0224,1679-6225
DOI: 10.1590/1982-0224-20170162