9492

• UCREFRP Catalog Number: 9492
• Author: Snyder, D. E.
• Title: Computer-Interactive Key to Sucker Larvae and Early Juveniles of the Upper Colorado River Basin with Description of Longnose Sucker.
• USFW Year: 2003.
• USFW - Doc Type: Fort Collins.
• Copyright Material: NO

Recommendations ............................................................ 49

Bibliography ................................................................ 50

Personal Communications ........... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Appendix A - User's Guide to Intkey .............................................54

List of Tables

Except for the replacement and new tables listed below, tables referenced in this
supplemental update are those in Snyder and Muth (1990). Numbers for new tables continue the
series from that publication.

1 Comparison of size at onset or transition of developmental intervals, gut phases,
and other developmental events for larvae and early juveniles of Upper Colorado
River Basin catostomids. ................................................ 24

2 Comparison of the more diagnostic differences in meristics for larvae and early
juveniles of Upper Colorado River Basin catostomids. .........................25

3 Comparison of the more diagnostic differences in morphometrics for larvae and
juveniles of Upper Colorado River Basin catostomids. .........................26

4 Comparison of size relative to pigmental state of eyes and bodies for proto larvae
and lateral to ventral regions of the peritoneum for postflexion mesolarvae,
metalarvae, and early juveniles of Upper Colorado River Basin catostomids. ....... 28

5 Comparison of the more diagnostic melanophore pigmentation patterns for larvae
and juveniles of Upper Colorado River Basin catostomids. ...................... 30

6 Comparison of size relative to mouth position and lower lip lobe separation for
metalarvae and juveniles of Upper Colorado River Basin catostomids. ............33

7 Comparison of frontoparietal fontanelle size for selected length groups of larval
and juvenile catostomids of the Upper Colorado River Basin. .................... 34

8-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Snyder and Muth (1990)

38 Selected juvenile and adult meristics for Catostomus catostomus. . . . . . . . . . . . . . . . . .41

39 Size at apparent onset of selected developmental events for Catostomus
catostomus, as observed under low power magnification. ....................... 41

4