9550

• UCREFRP Catalog Number: 9550
• Author: Snyder, D. E. and R. T. Muth.
• Title: Catostomid Fish Larvae and Early Juveniles of the Upper Colorado River Basin - Morphological Descriptions, Comparisons, and Computer-interactive Key.
• USFW Year: 2004.
• USFW - Doc Type: Fort Collins, CO.
• Copyright Material: NO

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Fig.4. Measures and counts for larval and early juvenile fishes. Yolk sac and pterygiophores are included in width
and depth measures but fins and finfolds are not "B" in BPE and BPV means immediately behind. AMPM is
anterior margin of most posterior myomere. Location of width and depth measures at OD prior to D formation is
approximated to that of later larvae. PHP is measured to end of notochord until adult complement of principal
caudal-fin rays are observed. Fin lengths (D, A, P1, and P2, encircled) are measured along plane of fin from origin
to most distal margin. When reported together, rudimentary median-fin rays (outlined above) are given in lower
case Roman numerals, while principal median-fin rays (darkened above) are given in arabic numerals; rudimentary
rays are not distinguished in paired fins. Most anterior, most posterior, and last myomeres in counts to specific
points of reference are shaded above. (From Snyder 1981.)

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