Species that contain: Pygidium and rivulatus [ 5 ] records

atochae, Pygidium Allen [W. R.] in Eigenmann & Allen 1942:156, Pl. 13 (figs. 3-5) [Fishes of western South America; ref. 1246] Río de Atocha, Bolivia. Holotype: CAS 64576 [ex IU 17819]. Paratypes: CAS 64577 [ex IU 17819] (4), USNM 167864 [ex IU 17819] (83). Type catalog: Ferraris & Vari 1992:41 [ref. 19771], Ferraris 2007:423 [ref. 29155]. •Synonym of Trichomycterus rivulatus Valenciennes 1846 -- (de Pinna & Wosiacki in Reis et al. 2003:284 [ref. 27061], Ferraris 2007:423 [ref. 29155]). •Valid as Trichomycterus atochae (Allen 1942) -- (Fernández 2000:32 [ref. 26195], Fernández & Chuquihuamaní 2007:55 [ref. 29320], Sarmiento et al. 2014:193 [ref. 35004]). Current status: Valid as Trichomycterus atochae (Allen 1942). Trichomycteridae: Trichomycterinae. Distribution: Bolivia. Habitat: freshwater.

eigenmanni, Trichomycterus Boulenger [G. A.] 1898:8 [Bollettino dei Musei di Zoologia ed Anatomia Comparata della R. Università di Torino v. 13 (no. 329); ref. 14677] Cumbaca [unknown], Brazil. Holotype: MCZ 8301. Type catalog: Ferraris 2007:423 [ref. 29155]. New name for Pygidium kneri of Eigenmann 1889 (not of Steindachner). •Valid as Trichomycterus eigenmanni Boulenger 1898 -- (Ortega & Vari 1986:15 [ref. 9708], Burgess 1989:322 [ref. 12860]). •Synonym of Trichomycterus rivulatus Valenciennes 1846 -- (Burgess 1989:323 [ref. 12860], de Pinna & Wosiacki in Reis et al. 2003:284 [ref. 27061], Ferraris 2007:423 [ref. 29155], DoNascimiento et al. 2014:726 [ref. 33632]). Current status: Synonym of Trichomycterus rivulatus Valenciennes 1846. Trichomycteridae: Trichomycterinae. Habitat: freshwater.

oroyae, Pygidium Eigenmann [C. H.] & Eigenmann [R. S.] 1889:51 [Proceedings of the California Academy of Sciences (Series 2) v. 2; ref. 1253] Rio Oroya, Pochachara, Brazil. Syntypes: MCZ 3955 (8). Type catalog: Ferraris 2007:423 [ref. 29155]. •Synonym of Trichomycterus rivulatus Valenciennes 1846 -- (Burgess 1989:323 [ref. 12860], de Pinna & Wosiacki in Reis et al. 2003:284 [ref. 27061], Ferraris 2007:423 [ref. 29155]). •Valid as Trichomycterus oroyae (Eigenmann & Eigenmann 1889) -- (Ortega & Vari 1986:15 [ref. 9708], Fernández & Chuquihuamaní 2007:55 [ref. 29320], García-Melo et al. 2016:237 [ref. 34471]). Current status: Valid as Trichomycterus oroyae (Eigenmann & Eigenmann 1889). Trichomycteridae: Trichomycterinae. Distribution: Andes and Brazil. Habitat: freshwater.

quechuorum, Pygidium Steindachner [F.] 1900:207 [Anzeiger der Kaiserlichen Akademie der Wissenschaften, Wien, Mathematisch-Naturwissenschaftliche Classe v. 37 (no. 18); ref. 14771] Arequipa, Río Chile, southern Peru. Syntypes: ZSM [old collection] (5) destroyed in WWII. Type catalog: Neumann 2006:282 [ref. 28925], Ferraris 2007:423 [ref. 29155]. Originally appeared as above, but later changed to "Pygidium (Trychomycterus Val.) quechuorum nob." when illustrated and described in more detail in Steindachner 1902:137, Pl. 4 (figs. 3-3a) [ref. 10435]. •Synonym of Trichomycterus rivulatus Valenciennes 1846 -- (Burgess 1989:323 [ref. 12860], de Pinna & Wosiacki in Reis et al. 2003:284 [ref. 27061], Ferraris 2007:423 [ref. 29155]). •Valid as Trichomycterus quechuorum (Steindachner 1900) -- (Ortega & Vari 1986:16 [ref. 9708], Fernández & Chuquihuamaní 2007:55 [ref. 29320]). Current status: Valid as Trichomycterus quechuorum (Steindachner 1900). Trichomycteridae: Trichomycterinae. Distribution: Chile River, Peru. Habitat: freshwater.

tiraquae, Pygidium Fowler [H. W.] 1940:92, Fig. 52 [Proceedings of the Academy of Natural Sciences of Philadelphia v. 92; ref. 1436] Tiraque, Cochabamba, Bolivia. Holotype: ANSP 69126 (with paratypes). Paratypes: ANSP 69127-29 and 69230-70 (45, in one jar). Type catalog: Böhlke 1984:163 [ref. 13621], Ferraris 2007:423 [ref. 29155]. •Synonym of Trichomycterus rivulatus Valenciennes 1846 -- (de Pinna & Wosiacki in Reis et al. 2003:284 [ref. 27061], Ferraris 2007:423 [ref. 29155]). •Valid as Trichomycterus tiraquae (Fowler 1940) -- (Fernández & Chuquihuamaní 2007:55 [ref. 29320], Fernández & Miranda 2007:1314 [ref. 29361], Fernández & Vari 2009:198 [ref. 30062], DoNascimiento et al. 2014:726 [ref. 33632], Sarmiento et al. 2014:193 [ref. 35004]). Current status: Valid as Trichomycterus tiraquae (Fowler 1940). Trichomycteridae: Trichomycterinae. Distribution: Bolivia. Habitat: freshwater.