## Abstract The integument of the paddlefish (__Polyodon spathula__) is unusual as a relatively small amount of mucus is produced by epithelial cells that are not modified into regular mucous gland cells. A thick compact epidermis and dermis compensate for the slight amount of mucus secreted. Padd
Contemporary status of the North American paddlefish, Polyodon spathula
β Scribed by Kim Graham
- Book ID
- 110249923
- Publisher
- Springer
- Year
- 1997
- Tongue
- English
- Weight
- 99 KB
- Volume
- 48
- Category
- Article
- ISSN
- 0378-1909
No coin nor oath required. For personal study only.
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## Abstract In __Polyodon spathula__, the pectoral fin radials, with the exception of the metapterygium, are derived from the decomposition of a single continuous cartilage fin plate that is continuous with the scapulocoracoid. This cartilage sheet develops two interior splits to form three precurs
## Abstract Retinal wholeβmount preparations from the eyes of the North American paddlefish, __Polyodon spathula__, were examined with a combination of bright field and differential interference contrast microscopy. The entire retina was mapped and population counts of rod and cone photoreceptors w