1210 Journal of species lists and distribution Chec List N OTES ON G EOGRAPHIC D ISTRIBUTION Check List 10(5): 1210–1212, 2014 © 2014 Check List and Authors ISSN 1809-127X (available at www.checklist.org.br) Parotocinclus collinsae Schmidt & Ferraris 1985; some years after, the accessory teeth were also observed by many authors in different genera and species: Reis & Schaefer The Neotropical family Loricariidae is the largest within the Siluriformes and contains six subfamilies. The species included in the subfamily Hypoptopomatinae have a wide distribution from the Orinoco basin to the Rio de la Plata, with the largest number of small bodied hypoptopomatine genera distributed in Southeastern Brazil. Among the genera present in Southern Brazil, Eurycheilichthys Reis & Schaefer, 1993 is considered until now endemic to mountain rivers of Rio Grande do Sul State, occurring above 600 m of altitude. Eurycheilichthys pantherinus (Reis & Schaefer, 1992) lives in the Uruguay River basin and E. limulus Reis & Schaefer, 1998 inhabits the upper basin of the Jacuí River. Recent samples revealed the presence of E. pantherinus in a small stream of the Uruguay River basin, in the province of Misiones. Thus, this is the first record of the species in the middle Uruguay of Argentina. The specimens examined were collected in the arroyo Garibaldi near San Pedro City (approx. 26°53′00″ S, 54°05′01″ W), a headwater of the arroyo Yabotí Guazú which flows into the Uruguay river (Figures 1 and 2). The stream has very clear, rapidly streaming water and stony bottom. The specimens were collected only in the rapids. Reis and Schaefer (1992) described E. pantherinus by the possession of several characteristics: an apomorphic character seven branched pectoral-fin rays; presence of greatly expanded lower lip (Figure 3); accessory ceratobranchial flange reduced to a slender uncinate process; loss of filamentous gill rakers from the oral surfaces of the hyoid skeleton; and very wide body, with cleithral width 27.5–31.8% SL. The collected specimens have these characteristics, although, one of the two cleared and stained specimens has a large accessory flange in the ceratobranchial. The males have a fleshy flap along the posterior margin of the thickened first pelvic-fin rays. Eurycheilichthys pantherinus also has an accessory series of unicuspid teeth in the maxilla and dentary not associated with the common bicuspid teeth. Reis and Schaefer (1992) commented that this type of unicuspid teeth appears in Abstract: The hypoptopomatine genus Eurycheilichthys was so far considered to be endemic to the South of Brazil. One of its species, E. pantherinus, was described from the upper Uruguay river basin. We inform about the finding of this species within the Garibaldi creek, headwater of the arroyo Yabotí Guazú. This is the first record for Argentina which is found in a tributary of the middle Uruguay river. 1 Museo de La Plata, Conicet, Paseo del Bosque s/n, 1900 La Plata, Argentina. 2 Friesenstraße 11, 45476 Muelheim, Germany. * Corresponding author. E-mail: azpeli@fcnym.unlp.edu.ar María de las Mercedes Azpelicueta 1* and Stefan Koerber 2 First record of the hypoptopomatine genus Eurycheilichthys Reis & Schaefer, 1993 (Siluriformes, Loricariidae) from Argentina DOI: 10.15560/10.5.1210 Figure 1. Habitat where Eurycheilichthys pantherinus was collected: Arroyo Garibaldi, Misiones, Argentina. Figure 2. The new locality in the arroyo Garibaldi, Misiones, Argentina, is indicated with a green dot; the other dots indicate the previously known localities in Brazil. Pink dot is the type locality: Rio Grande do Sul, creek tributary of rio dos Touros (Reis & Schaefer, 1998).