. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 492 BuUetin Miiseuui of Comparative Zoology, Vol. 144, No. 8. Figure 1. lotabrycon praecox, new genus and new species, MCZ 48659, ci parafype (hooks on anal fin based on alizarin preparation of 6 parafype). lotabrycon praecox new species Figures 1-4 Ilolotype. MCZ 48658, a male mm, from an isolated dry season pool in Hio Nuevo where it flows into l(4t side of Rio Vinces, one kilometer upstream from the town of \'inces, 5 No\ember 1971. Parcitypcs. MCZ 48659, 8 females or immatures mm and
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 492 BuUetin Miiseuui of Comparative Zoology, Vol. 144, No. 8. Figure 1. lotabrycon praecox, new genus and new species, MCZ 48659, ci parafype (hooks on anal fin based on alizarin preparation of 6 parafype). lotabrycon praecox new species Figures 1-4 Ilolotype. MCZ 48658, a male mm, from an isolated dry season pool in Hio Nuevo where it flows into l(4t side of Rio Vinces, one kilometer upstream from the town of \'inces, 5 No\ember 1971. Parcitypcs. MCZ 48659, 8 females or immatures mm and 12 males mm, eolleeted widi the holotv'pe. General features. Largest specimen, a female, mm. Largest male mm. Males as small as mm sexually mature (as indicated by full de\"elopment of caudal gland and hooks on anal and pelvic fins). Body elongate, slender. Eye large. Adipose eyelid absent. Mouth moderately superior, lower jaw^ slightK' projecting. Maxillary extending to anterior border of eye but not beyond, exposed (not slipping under first infraorbital, which is greatly reduced); leadmg edge of maxillary con- vex. Premaxillary with a row of 5 or 6 conical teeth; maxillary toothless; dentary with a row of 6 teeth, first four somewhat larger than those on premaxillary, last two reduced; first tooth on dentary pointed into mouth, second tooth pointed out\vards (Fig. 11). First gill arch with 5 or 6+12 moderately long, edentulous, widely spaced gill rakers (Fig. 19). Pseudotympanum absent, area normally occupied by pseudotympanum with orangish fat de- posits. Belly rounded. No membranous ventral keel between pelvic fins and anal fin origin (often present in minute or lar\al characids at comparable sizes). Proportional meamirements. The measure- nuncs of the holotype are given first, fol- lowed in parentheses by the ranges in the tvpe series. Bodv depth (). Depth caudal peduncle (). Pre- dorsal length (). Preanal lengt
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