Morphology Data of Odontostilbe pulchra
Identification keys
Abnormalities
Main Ref. Bührnheim, C.M. and L.R. Malabarba, 2007
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors
Remarks

Descriptive characteristics of juvenile and adult

Striking features
Body shape lateral elongated
Cross section compressed
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth terminal
Type of scales cycloid scales
Diagnosis

Distinguished from most other members of the genus Odontostilbe by having a remarkably long anal-fin base 26.0-33.5% SL, with only Odontostilbe nareuda has a similarly long anal-fin base length 31.3-32.8% SL, but can be differentiated from Odontostilbe pulchra in having anal-fin rays 24-26 (vs. 17-24, usually 19-22 in Odontostilbe pulchra). In addition, mature males of Odontostilbe pulchra differ from Odontostilbe fugitiva, Odontostilbe ecuadorensis, Odontostilbe dierythrura, Odontostilbe parecis, Odontostilbe paraguayensis, Odontostilbe microcephala, Odontostilbe splendida, and Odontostilbe pao by possessing hooks on the 1st to 22nd anal-fin branched rays of males, practically

on all branched anal-fin rays (vs. 1st to 9th, mostly 6th-7th, anal-fin branched rays of males with hooks); distal border of anal fin slightly concave to almost straight in mature males (vs. distal border concave); longer pectoral fin passing a vertical through pelvic-fin origin (vs. shorter pectoral fin reaching but not trespassing to vertical through pelvic-fin origin), almost absence of elongation of the 2nd unbranched dorsal-fin ray (vs. noticeably elongate 2nd unbranched dorsal-fin ray). Furthermore, males, females and unsexed specimens differ from

Odontostilbe fugitiva by having longer upper jaw 26.8-32.5% HL (vs. 23.4-30.0% HL). The snout length in males separates Odontostilbe pulchra (18.0-26.0% HL, mean 21.8%) from the sympatric species Odontostilbe splendida with 24.1-26.9% HL, mean 25.2% HL, and Odontostilbe pao with 26.7-30.6 HL, mean 28.6% HL (Ref. 75063).

Description: Dorsal fin ii9; Anal fin iv, v, or vi, 17, 18, 19, 20, 21, 22, 23 or 24; Pectoral fin i10, 11 or 12; Pelvic fin i6, 6i; 7, or 7i. Precaudal vertebrae, including Weberian apparatus 14, 15 or 16 (Ref. 75063).

Ease of Identification

Meristic characteristics of Odontostilbe pulchra

Lateral Lines Interrupted: No
Scales on lateral line 33 - 37
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line 5 - 6
Scale rows below lateral line 3 - 4
Scales around caudal peduncle 14 - 14
Barbels
Gill clefts (sharks/rays only)
Gill rakers
on lower limb 10 - 12
on upper limb 5 - 7
total
Vertebrae
preanal 14 - 16
total

Fins

Dorsal fin(s)

Attributes
Fins number
Finlets No. Dorsal   
Ventral  
Spines total
Soft-rays total 11 - 11
Adipose fin present

Caudal fin

Attributes forked

Anal fin(s)

Fins number
Spines total
Soft-rays total

Paired fins

Pectoral Attributes  
Spines     
Soft-rays   11 - 13
Pelvics Attributes  
Position    abdominal  before origin of D1
Spines     
Soft-rays   7 - 8
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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