Fishes from the rio da Dona, a threatened environment in the Recôncavo Sul basin, Bahia, Brazil
Creators: name: Vita, George
name: Ferreira, Marco Tulio Oliveira
name: Tavechio, Washington
name: Guidelli, Gislaine
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy

description: APPENDIX 2. IDENTIFICATION KEY FOR FISH SPECIES OF THE RIO DA DONA BASIN   1. Body covered by skin or bony plates,scales absent................................................................................................................................................................... 2   
 1’. Body covered by scales..............................................................................................................................................................................................................6   
 2. Body partially or completely covered by bony plates................................................................................................................................................................. 3   
 2’. Body without bony plates.........................................................................................................................................................................................................5   
  3. Two longitudinal series of bony plates on the lateral of body;mouth subterminal............................................................................................... Aspidoras kiriri    
 3’. Three or more longitudinal series of bony plates on the lateral of body;mouth ventral and sucker-like................................................................................... 4   
  4. Absence of tuft of denticles on the occiput; scapular bridge non-exposed and weakly covered by dispersed small plates; ventral surface weakly covered by small plates; body and fins with large dark rounded spots bigger than those on the head........................................................................... Hypostomus unae    
  4’. Tuft of denticles present; scapular bridge exposed and entirely covered by odontodes; ventral surface covered by large lateral plates and numerous small plates grouped medially; presence of a light brown strip from snout tip to caudal fin,with four dark vertical bars on the trunk and fin rays with small dark spots...................................................................................................................................................................................................... Parotocinclus cristatus    
  5. Presence of odontodes on the opercle;absence of pungent spine on the fins;adipose fin absent......................................................... Trichomycterus bahianus    
  5’. Opercle without odontodes;presence of pungent spine on pectoral fins;adipose fin present............................................................................ Rhamdia quelen    
 6. Anteriormost elements of the dorsal and anal fins as spines.....................................................................................................................................................7   
 6’. Dorsal and anal fins without spines......................................................................................................................................................................................... 10   
  7. Upper branch of the first gill arch with lobe........................................................................................................................................ Geophagus gr. brasiliensis    
 7’. Upper branch of the first gill arch without lobe......................................................................................................................................................................... 8   
  8. Four spines on the anal fin; oval dark blotch in the middle body................................................................................................... Cichlasoma sanctifranciscense    
 8’. Three spines on the anal fin;dark blotch absent....................................................................................................................................................................... 9   
  9. Spines of the dorsal fin separated from the soft-branched rays by a notch;presence of an ocellus-shaped caudal blotch....................................... Cichla pinima    
  9’. Dorsal fin without a notch;caudal blotch absent............................................................................................................................................. Coptodon rendalli    
 10. Lateral line absent;protractible premaxilla;adipose fin absent..............................................................................................................................................11   
 10’. Lateral line partially or completely present;non-protractible premaxilla;adipose fin usually present....................................................................................12   
  11. Males and females with a single dark blotch on the lateral of the body,anteriorly to dorsal fin;males with same color pattern as females...... Poecilia vivipara    
  11’. Females without a dark blotch on the lateral of the body;males with different color pattern than females (green,blue and/or red blotches in live specimens), and may present more than one dark blotch on the lateral of the body........................................................................................................ Poecilia reticulata    
  12. Only conical and canine teeth present;adipose fin absent;rounded caudal fin............................................................................................ Hoplias malabaricus    
 12’. Conical,incisive,truncated and/or multicuspid teeth;adipose fin present;caudal fin bifurcated or emarginated...................................................................13   
  13. Cranium without frontal fontanelle; tiny subterminal mouth;“3”-shaped bar on caudal fin present............................................... Characidium aff. timbuiense    
 13’. Frontal fontanelle present;mouth large;“3”-shaped bar on caudal fin absent.......................................................................................................................14   
  14. Incisive teeth;three or four teeth on each side of the premaxilla and the dentary;gill membranes attached to the isthmus....................... Leporinus bahiensis    
 14’. Conical and/or multicuspid teeth;more than four teeth on the premaxilla and dentary......................................................................................................... 15   
  15. Premaxilla with a single tooth series;sharp tricuspid teeth on both premaxilla and dentary;abdomen compressed with a keel of spines preceding pelvic fins................................................................................................................................................................................................................. Serrasalmus brandtii    
 15’. Premaxilla with two tooth series;teeth variably shaped;abdomen non-compressed and without keel of spines.................................................................. 16   
 16. Lateral line incomplete........................................................................................................................................................................................................... 17   
 16’. Lateral line complete..............................................................................................................................................................................................................18   
  17. Pseudotympanum present;humeral blotch absent;dark conspicuous caudal-peduncle blotch usually present................................. Hyphessobrycon parvellus    
  17’. Pseudotympanum absent;faint vertically elongate humeral blotch present;caudal-peduncle blotch absent.............................. Hyphessobrycon itaparicenscis    
  18. Well-defined and horizontally elongated humeral blotch;maxillary teeth absent........................................................................................... Astyanax lacustris    
 18’. One or two vertically elongated humeral blotches; at least one maxilla tooth present...........................................................................................................19   
  19. One humeral blotch with straight edges;one tooth on the maxilla;24-28 branched rays on the anal fin................................................. Astyanax aff. fasciatus    
  19’. Two humeral blotches, being the anteriormost comma-shaped,wider dorsally;up to two maxillary teeth;18-20branched rays on the anal fin.......................................................................................................................................................................................................................................... Astyanax burgerai
description: Published as part of Vita, George, Ferreira, Marco Tulio Oliveira, Tavechio, Washington & Guidelli, Gislaine, 2020, Fishes from the rio da Dona, a threatened environment in the Recôncavo Sul basin, Bahia, Brazil, pp. 1-10 in Papéis Avulsos de Zoologia 60 on page 10, DOI: 10.11606/1807-0205/2020.60.08, http://zenodo.org/record/3727932