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<br />Utah sucker, Catostomus ardens
<br />Full Analysis: LFL 83444-83492.
<br />Drawings: LFL 83447, 83451, 83461, 83463,
<br />83471,83484,83492.
<br />Cleared and Stained (from which all or many
<br />specimens were used for skeletal study):
<br />LFL 83493-83497.
<br />Additional Reference (from which selected
<br />specimens were cursorily examined): LFL
<br />83498-83576.
<br />Updates (specimens on which character range
<br />extensions since Snyder and Muth 1990
<br />were based): LFL 13.
<br />
<br />Longnose sucker, Catostomus catostomus
<br />Full Analysis: LFL 6690, 6837, 26446,
<br />678220-67278,81460-81495.
<br />Drawings: LFL 6690, 6837, 67222-67223,
<br />67228-67230,67235-67237,67243-67245,
<br />67253-67257,67261-67265,81460-81462.
<br />Cleared and Stained: LFL 81496-81526.
<br />Additional Reference: LFL 67168-67219,
<br />78003,81190-81459,81527-81528.
<br />
<br />White sucker, Catostomus commersoni
<br />Full Analysis: LFL 69104-69229.
<br />Drawings: LFL 69218,69221,69225,69228-
<br />69229.
<br />Cleared and Stained: LFL 69230-69276.
<br />Additional Reference: LFL 70244-70401.
<br />
<br />Bluehead sucker, Catostomus discobolus
<br />Full Analysis: LFL 68748-68815, 69678-69708.
<br />Drawings: LFL 68816-68826.
<br />Cleared and Stained: LFL 68827-68834.
<br />Additional Reference: LFL 69710-69948.
<br />Updates: LFL 69713,69923,80454.
<br />
<br />Flannelmouth sucker, Catostomus latipinnis
<br />Full Analysis: LFL 68987-69059.
<br />Drawings: LFL 69060-69078.
<br />Cleared and Stained: LFL 69079-69087.
<br />Additional Reference: LFL 69949-70243.
<br />Updates: LFL 69949-69952,69975,83957.
<br />
<br />Mountain sucker, Catostomus platyrhynchus
<br />Full Analysis: LFL 83577-83626.
<br />Drawings: LFL 83578, 83580, 83585, 83605,
<br />83612,83619,83625.
<br />Cleared and Stained: LFL 83627-83628.
<br />Additional Reference: LFL 83629-83673.
<br />
<br />Razorback sucker, Xyrauchen texanus
<br />Full Analysis: LFL 69401-69512, 69523-
<br />69524.
<br />Drawings: LFL 69466,69485,69513-69519.
<br />Cleared and Stained: LFL 69520-69522.
<br />Additional Reference: LFL 69400, 70403-70550.
<br />Updates: LFL 80501-80504, 80506, 80508-
<br />80509, 80513, 80515-80516 (also, speci-
<br />men in Museum of Southwestern Biology,
<br />Accession number 200 I-IV: 17, WJBOl-134).
<br />
<br />Specimen Data, Observations, and Illustrations
<br />
<br />Specimens were analyzed for counts, mea-
<br />sures, developmental state, structural differ-
<br />ences, and pigment distribution. Figure 4 illus-
<br />trates the various measurements, fin-ray counts,
<br />and myomere counts that were made on at least
<br />two specimens, if available, in each l-mm- TL
<br />interval throughout the larval period of each
<br />species. Thereafter, to a length of about 50 mm
<br />TL, one or more specimens were similarly
<br />processed for each 5-mm interval, if available.
<br />Specimens were studied under low-power
<br />stereo-zoom microscopes with measuring eye-
<br />piece reticles and various combinations of
<br />reflected, transmitted, and polarized light. For
<br />specimens studied prior to 1992 (all except
<br />longnose sucker), morphometric analysis was
<br />conducted by adjusting microscope magnifi-
<br />cation before each series of measurements to
<br />calibrate the scale in the eyepiece against a stage
<br />
<br />micrometer for direct measurement. Measure-
<br />ments were made to the nearest 0.1 mm and
<br />occasionally to half that unit. Remeasurement
<br />of selected specimens by a second observer
<br />indicated that most measurements are repeatable
<br />to within 0.1 mm. For more recent morphomet-
<br />ric analyses (i.e., longnose sucker), most mea-
<br />surements were made using multiple digital
<br />images of the specimens captured through the
<br />microscope and a computer image-analysis and
<br />measurement program (Optimas 5.1, Optimas
<br />Corp., Seattle). Most measurements other than
<br />SL and TL are summarized by developmental
<br />phase as % SL, but are readily converted percent
<br />TL (% TL) by dividing the length of interest (as
<br />% SL) by TL (AS to PC, as % SL), and
<br />multiplying by 100. Some meristic data were
<br />obtained from specimens cleared and stained for
<br />skeletal study and from available adults.
<br />
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