Teleostei (teleosts) > 
Characiformes (Characins) > 
Acestrorhamphidae (American tetras) > Stethaprioninae						
							
							Etymology: Orthospinus: Greek, ortho = straight + Latin, spina, pinna = thorn (Ref. 45335).
More on author: Eigenmann.						
					Issue   
See Reis (1989) for phylogeny, description, figure, and comparison with other species.
			
			
				
					Environment: milieu / climate zone / depth range / distribution range					
						Ecology					
				
				
				
					Freshwater;  benthopelagic. Tropical				
				
			
			
			
				
				
				
					South America:  São Francisco River basin in Brazil.
				
				
			
			
				
					Size / Weight / Age
				
				
				
					Maturity: Lm ?  range ? - ? cm
 Max length : 7.5 cm SL male/unsexed; (Ref. 130067); max. published weight: 16.00 g (Ref. 130067)				
				 
			
			
			
			
			
			
			
			
							
			
			
			
			
				
					Life cycle and mating behavior					
					Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae				
				
				
				
								
				
			
			 
				
				
				
					Reis, R.E., 2003. Subfamily Stethaprioninae (Silver dollar tetras). p. 209-211. In R.E. Reis, S.O. Kullander and C.J. Ferraris, Jr. (eds.) Checklist of the Freshwater Fishes of South and Central America. Porto Alegre: EDIPUCRS, Brasil. (Ref. 36891)
				
				 
			
			
			
							
					
						IUCN Red List Status   (Ref. 130435: Version 2025-1)
					
					
				 
					
			
			
			
			
			
			
			
				
					Threat to humans  
				
				
				
					  Harmless				
				
			 
			
			
			
			
				
					Human uses  				
				
				
									
				
				
			
			
						
			
			
			
				
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Special reports
 
				
			
			
			
				
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					Internet sources
				
				
			
			
			
				
					Estimates based on models				
				
				
				
				
				
					
					Phylogenetic diversity index  (Ref. 
82804):  PD
50 = 1.0000   [Uniqueness, from 0.5 = low to 2.0 = high].					
													Bayesian length-weight: a=0.01622 (0.00906 - 0.02903), b=3.14 (2.99 - 3.29), in cm total length, based on LWR estimates for this species & (Sub)family-body  (Ref. 
93245).
					
					Trophic level  (Ref. 
69278):  3.2   ±0.4 se; based on size and trophs of closest relatives					
											
				
				
										
						Resilience  (Ref. 
120179):  High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).					
											
				
									
					Fishing Vulnerability  (Ref. 
59153):  Low vulnerability (10 of 100). 
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