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List of Freshwater Fishes reported from Guyana
n = 520
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Table 1: 497 species currently present in the country/island (endemic, native, introduced, reintroduced);
Table 2: 12 species possibly present in the country/island (stray, questionable);
Table 3: 11 species demonstrated to be absent in the country/island (extirpated, not established, misidentification, error).
Table 4: 520 species reported from the country/island altogether.
Table : 520 .
     
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Family Species Author Info Occurrence Common names Abundance Max length Maturity Remark Photo
Anostomidae Abramites hypselonotus (Günther, 1868) Fr native   14.00 cm TL male/unsexed   
Characidae Acanthocharax microlepis Eigenmann, 1912 Fr native   8.50 cm SL male/unsexed  Known from the Essequibo River basin (Ref. 36811). Recorded from Potaro rivers (Ref. 598). 
Doradidae Acanthodoras cataphractus (Linnaeus, 1758) Fr native   11.50 cm SL male/unsexed  Occurs in the Essequibo River (Ref. 27188). 
Doradidae Acanthodoras spinosissimus (Eigenmann & Eigenmann, 1888) Fr native  Kiru-kiru (Not specified), Macusi (Not specified)  13.70 cm SL male/unsexed  Known from tne Essequibo River basin (Ref. 37054). 
Cichlidae Acarichthys heckelii (Müller & Troschel, 1849) Fr native   19.50 cm SL male/unsexed   
Cichlidae Acaronia nassa (Heckel, 1840) Fr native   16.00 cm SL male/unsexed 8 TL Known from the Essequibo River basin (Ref. 36377). 
Acestrorhynchidae Acestrorhynchus falcatus (Bloch, 1794) Fr native   30.00 cm TL male/unsexed   
Acestrorhynchidae Acestrorhynchus falcirostris (Cuvier, 1819) Fr native   45.00 cm SL male/unsexed   
Acestrorhynchidae Acestrorhynchus microlepis (Jardine, 1841) Fr native   37.00 cm TL male/unsexed  Present in the Maroni River which forms the border between Guyana and French Guiana. 
Acestrorhynchidae Acestrorhynchus nasutus Eigenmann, 1912 Fr native   6.90 cm SL male/unsexed  Known from the Essequibo River at Rockstone (Ref. 52916). Also Ref. 598. 
Achiridae Achirus achirus (Linnaeus, 1758) Fr, Br, M, Fi native   37.00 cm TL male/unsexed  Occurrence in this country not supported by R.T.C. Ramos. However, specimen collected in this country (MNHN 0000-3347), has been recognized as A. achirus by M. Dessouter (pers. Comm., 2003). Highly esteemed foodfish in this country (Ref. 51483). 
Serrasalmidae Acnodon oligacanthus (Müller & Troschel, 1844) Fr native   20.00 cm TL male/unsexed   
Cichlidae Aequidens potaroensis Eigenmann, 1912 Fr endemic   10.00 cm SL male/unsexed  Known from the Essequibo River basin (Ref. 36377). Found in the Mazaruni River near Kamarang (Ref. 26742). Also Ref. 12251.  No picture yet.
Cichlidae Aequidens tetramerus (Heckel, 1840) Fr native   19.20 cm TL male/unsexed  Known from the Essequibo drainage. 
Auchenipteridae Ageneiosus inermis (Linnaeus, 1766) Fr native   64.80 cm TL male/unsexed   
Auchenipteridae Ageneiosus marmoratus Eigenmann, 1912 Fr native   18.50 cm SL male/unsexed  Found in a creek below Potaro landing (Ref. 2037). Also Ref. 6868. 
Auchenipteridae Ageneiosus ucayalensis Castelnau, 1855 Fr native   35.20 cm SL male/unsexed   
Triportheidae Agoniates anchovia Eigenmann, 1914 Fr misidentification   14.80 cm SL male/unsexed  Occurrence in this country not confirmed by F.C.T. Lima.  No picture yet.
Triportheidae Agoniates halecinus Müller & Troschel, 1845 Fr native   26.80 cm TL male/unsexed  Also Ref. 598. 
Hypopomidae Akawaio penak Maldonado-Ocampo, López-Fernández, Taphorn, Bernard, Crampton & Lovejoy, 2013 Fr endemic   21.70 cm TL male/unsexed  Found only in the main channel of the upper Mazaruni River, the mouth of the Kamarang River and Waruma Creek: a small tributary of the Kako River, which in turn is a major tributary of the upper Mazaruni (Ref. 94087).  No picture yet.
Doradidae Amblydoras affinis (Kner, 1855) Fr native  Saurauwari (Not specified), Yarauira (Not specified)  13.20 cm SL male/unsexed   
Crenuchidae Ammocryptocharax lateralis (Eigenmann, 1909) Fr native   2.83 cm SL male/unsexed  Occurs in Potaro and Mazaruni River basins (Ref. 37059). Museum: Amatuk Falls, Porao River, Essequibo River drainage, FMNH 72627, originally CM 1141 (holotype, 2.83 cm SL) (Ref. 13683).  No picture yet.
Crenuchidae Ammocryptocharax vintonae (Eigenmann, 1909) Fr native   9.01 cm SL male/unsexed  Recorded from the Potaro and Mazaruni rivers. Museum: Shrimp Creek, FMNH 52756 (originally CM 1142) (holotype, 5.96 cm SL) (Ref. 13683).  No picture yet.
Anablepidae Anableps anableps (Linnaeus, 1758) Fr, Br native  Foureye (English), Foureyed fish (English)  30.00 cm TL male/unsexed  Also Ref. 5217. 
Anablepidae Anableps microlepis Müller & Troschel, 1844 Fr, Br native  Foureye (English)  32.00 cm TL male/unsexed  Also Ref. 5217. 
Rivulidae Anablepsoides holmiae (Eigenmann, 1909) Fr endemic   8.00 cm TL male/unsexed  Known from the Amazon River basin (Ref. 36579).  No picture yet.
Rivulidae Anablepsoides lanceolatus (Eigenmann, 1909) Fr endemic   5.50 cm TL male/unsexed    No picture yet.
Rivulidae Anablepsoides mazaruni (Myers, 1924) Fr endemic   6.00 cm TL male/unsexed  Known from the Essequibo River basin (Ref. 36579). Also Ref. 27139.  No picture yet.
Rivulidae Anablepsoides stagnatus (Eigenmann, 1909) Fr native   6.00 cm TL male/unsexed   
Rivulidae Anablepsoides waimacui (Eigenmann, 1909) Fr endemic   8.50 cm TL male/unsexed  Known from the Amazon River basin (Ref. 36579). Also Ref. 27139. 
Engraulidae Anchoa spinifer (Valenciennes, 1848) Fr, Br, M native  Herring (English), Anchovy (English)  24.00 cm TL male/unsexed  Also Ref. 50628. 
Engraulidae Anchovia surinamensis (Bleeker, 1865) Fr, Br native   15.00 cm TL male/unsexed   
Engraulidae Anchoviella guianensis (Eigenmann, 1912) Fr, Br native   11.30 cm TL male/unsexed   
Engraulidae Anchoviella lepidentostole (Fowler, 1911) Fr, Br, M native   18.00 cm TL male/unsexed   
Engraulidae Anchoviella manamensis Cervigón, 1982 Fr native   2.50 cm SL male/unsexed   
Loricariidae Ancistrus dolichopterus Kner, 1854 Fr native   14.50 cm SL male/unsexed   
Loricariidae Ancistrus hoplogenys (Günther, 1864) Fr native   15.80 cm SL male/unsexed  Known from the Essequibo River basin (Ref. 36713). 
Loricariidae Ancistrus kellerae de Souza, Taphorn & Armbruster, 2019 Fr native    Type locality of Ancistrus kellerae: Potaro River drainage, Kuribrong River (Ref. 119730).  No picture yet.
Loricariidae Ancistrus leucostictus (Günther, 1864) Fr native   10.00 cm SL male/unsexed  Known from the Essequibo River basin (Refs. 36713, 119730). 
Loricariidae Ancistrus lithurgicus Eigenmann, 1912 Fr native   13.20 cm SL male/unsexed  Known from the Essequibo River basin (Refs. 36713, 119730). Also Ref. 2037, 6868.  No picture yet.
Loricariidae Ancistrus nudiceps (Müller & Troschel, 1849) Fr endemic   7.90 cm SL male/unsexed  Known from Takutu River basin in upper Branco River drainage (Refs. 36713, 119730) and Esseuibo River basin (Ref. 119730). Also Ref. 6868.  No picture yet.
Loricariidae Ancistrus saudades de Souza, Taphorn & Armbruster, 2019 Fr native   10.75 cm SL male/unsexed  Type locality of Ancistrus saudades, Rupununi, Guyana, Region 9, Amazon/Branco/Takutu River, creek at second wooden bridge from Moco-Moco power station (Ref. 119730).  No picture yet.
Anguillidae Anguilla rostrata (Lesueur, 1817) Fr, Br, M questionable   152 cm TL male/unsexed ;122 cm TL female  Southern limit of distribution at immediate vicinity of Trinidad and Carribean Sea drainages of eastern Venezuela (Ref. 117411). 
Anostomidae Anostomoides laticeps (Eigenmann, 1912) Fr native   30.00 cm SL male/unsexed  Type locality: Essequibo River. 
Anostomidae Anostomus anostomus (Linnaeus, 1758) Fr native   16.00 cm TL male/unsexed   
Anostomidae Anostomus ternetzi Fernández-Yépez, 1949 Fr native   12.00 cm TL male/unsexed   
Parodontidae Apareiodon agmatos Taphorn, López-Fernández & Bernard, 2008 Fr native   8.04 cm SL male/unsexed  Found in the upper Mazaruni River basin (Ref. 795840.  No picture yet.
Parodontidae Apareiodon gransabana Starnes & Schindler, 1993 Fr native   9.20 cm SL male/unsexed  Also Ref. 35189.  No picture yet.
Characidae Aphyocharacidium melandetum (Eigenmann, 1912) Fr native   3.50 cm male/unsexed    No picture yet.
Characidae Aphyocharax erythrurus Eigenmann, 1912 Fr native   5.80 cm male/unsexed  Found in the Essequibo River basin (Ref. 38382). 
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