. Bonner zoologische Monographien. Zoology. 113. : Lateral view of the opercular series of Phoxinus. A: P. tennesseensis (UT , mm SL); B: P. phoxinus (KU 22856, mm SL); C: P. cumberlandensis (KU 18934, SL mm SL); D: P. eos (KU 12255, mm SL); E: P. issykkulensis (P-10696, mm SL); F: P. oreas (KU 3259, mm SL). Scale bars = 1 mm. Interopercle (). The interopercle is placed at the anteroventral portion of the opercular series. It is partially overlapped by ventral side of the preopercle dorsally, and by anterior portion of the subopercle posteri
. Bonner zoologische Monographien. Zoology. 113. : Lateral view of the opercular series of Phoxinus. A: P. tennesseensis (UT , mm SL); B: P. phoxinus (KU 22856, mm SL); C: P. cumberlandensis (KU 18934, SL mm SL); D: P. eos (KU 12255, mm SL); E: P. issykkulensis (P-10696, mm SL); F: P. oreas (KU 3259, mm SL). Scale bars = 1 mm. Interopercle (). The interopercle is placed at the anteroventral portion of the opercular series. It is partially overlapped by ventral side of the preopercle dorsally, and by anterior portion of the subopercle posteriorly. The interopercle is elongated triangular plate-like and tapes anteriorly; therefore, its ante- rior portion is narrower than its posterior portion. The shape of its posterior margin va- ries individually. The posterior margin can be concave, slope, or round in different specimens of a single species. Preopercle (). The preopercle is a "L"-shaped bone and located anteriorly to the opercle. Its posterior portion contacts the anterior margin of the opercle, its ventral margin contacts with dorsal side of the interopercle. It is crescent in shape, and its middle portion is broader than its anterior and dorsal portions. No variation with phylogenetic significance is observed in Phoxinus. Subopercle (). Placed ventrally to the opercle, the subopercle contacts the opercle dorsally and the preopercle 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
