. Bonner zoologische Monographien. Zoology. 28 2. Posterior barbel (). The posterior barbel of Couesius is a papillate appendage derived from the upper rictal tissue which is not homologous with the barbels of other "barbeled cyprinids,? ( cyprinins) (Howes 1985). This posterior barbel is located at the corner of the mouth, and present in Couesius only (). - TS 2: A posterior barbel absent [0], or present [1]. 3. Primary lamellae of the olfactory organ (). The primary lamellae of the ol- factory organ are arranged at both sides (lateral and medial) of the axis i
. Bonner zoologische Monographien. Zoology. 28 2. Posterior barbel (). The posterior barbel of Couesius is a papillate appendage derived from the upper rictal tissue which is not homologous with the barbels of other "barbeled cyprinids,? ( cyprinins) (Howes 1985). This posterior barbel is located at the corner of the mouth, and present in Couesius only (). - TS 2: A posterior barbel absent [0], or present [1]. 3. Primary lamellae of the olfactory organ (). The primary lamellae of the ol- factory organ are arranged at both sides (lateral and medial) of the axis in the olfactory. : Supratemporal and otic canals (in black), frontal, pterotic. parietal, epioccipital. and supraoc- cipital bones in hemitremians and in the outgroup. A: Nocomis platyrhynchus (KU 18926. mm SL); B: Semotilus corporalis (KU 18856, mm SL): C: Couesius plumbeus (KU 18881, mm SL). Scale bars = 1 Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bonn, Zoologisches Forschungsinstitut und Museum Alexander Koenig
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Keywords: ., bookcentury1900, bookcollectionbiodiversity, booksubjectzoology
