The species of the Hypostomus cochliodon group (Siluriformes: Loricariidae). Author Jonathan W. Armbruster text Zootaxa 2003 249 1 60 http://www.zoobank.org/urn:lsid:zoobank.org:pub:DDFAA9D6-E4FA-4C3C-9749-CF0313D30F3C journal article z00249p001 DDFAA9D6-E4FA-4C3C-9749-CF0313D30F3C Hypostomus pyrineusi Miranda-Ribeiro 1920 (Fig. 20) Hypostomus pyrineusi Miranda-Ribeiro 1920 : 9, pls. 3-4. Material examined: BOLIVIA . Beni :, Rio Curiraba, Rio Madeira dr. Campamento Trapiche, USNM 305281, 1, (119.8) . Rio Itenez, Rio Beni - Rio Madeira dr. 5 km S Costa Marques, Brasil, 1 km above mouth of Rio Baures, AMNH 39941, 1, (210.1) . Rio Itenez, Rio Beni dr. 9 km SE of Costa Marques, Brasil, UMMZ 204399, 5, (139.9-226.7) . Rio Itenez, Rio Beni - Rio Madeira dr. opposite Costa Marques, Brasil, AMNH 39758, 2, (92.0-213.4) . Rio Itenez, Rio Beni - Rio Madeira dr. playa pond, 9 km SE Costa Marques, Brasil, AMNH 40108 (none measured) . Rio Maniqui, Rio Marmore - Rio Madeira dr. San Borja, INHS 36995, 2, (162.7-176.0) . BRAZIL . Acre : Rio Macauhan, Rio Yaco - Rio Purus dr. vicinity of Rio Macauhan, USNM 94653, 1, (122.5) . Rio Macaua, Rio Iaco dr. near Sena Madueira, 09°20’S , 68°45’W , AMNH 12599, 1, (113.5) . Amazonas : Rio Jamari, MNRJ 863, 1, (204.0) , Holotype : ECUADOR . Napo : Rio Catapino, Rio Corrientes - Rio Napo dr. MCNG 9724, 1, (174.8) . Rio Pucuno, Rio Suno - Rio Napo dr. 00°47’S , 77°16’W , USNM 177222, 1, (71.3) . Rio Lushian, Rio Misahuali dr. at bridge E of Rucullacta, 00°54’42”S , 77°48’48”W , CAS 106013 . Shansho Cano , USNM 124875, 1, (100.5) . PERU . Amazonas : Rio Maranon dr. 1 km upstream from Caterpiza, LACM 42005-13, 2, (84.1-89.5) and LACM 42003-8, 2, (150.6-174.3) . Rio Maranon dr. 100 m downstream from Caterpiza, LACM 41996-9, 1, (137.1) and LACM 41972-3, 1, (140.9) . Rio Maranon dr. 300 m upstream from Caterpiza, LACM 41813-1, 1, (207.7) . Rio Maranon dr. 500 m upstream from Caterpiza, LACM 41992-7, 4, 1 cs, (162.4-190.1) and LACM 42010-8, 1, (108.0) . Rio Maranon dr. 800 m upstream from Caterpiza, LACM 41834-1, 1, (131.2) . Rio Maranon dr. Caterpiza, LACM 41873-7, 1, (180.7) , LACM 41882-4, 1, (180.9) , LACM 41884-1, 1, (198.9) , LACM 41887-5, 1, (160.3) , LACM 42009-10, 1, (133.9-164.9) , LACM 41898-2, 1, (140.0) , LACM 41893-9, 2, 1 cs, (152.8-163.2) , LACM 42115-8, 1, (104.7) , LACM 41895-6, 1, (152.8-163.2) , and LACM 42116-4, 1, (93.0) . Quebrada Kayamasa, Rio Maranon dr. 40 km upstream from Caterpiza, FMNH 97016, 1, (140.9) , LACM 41872-4, 2, (150.9-187.7) , LACM 41846-4, 1, (199.7) , LACM 41852-1, 1, (173.6) , and LACM 41853-4, 2, (136.7-156.4) . Quebrada Pastazilla, Rio Santiago - Rio Maranon dr. LACM 39947-8, 2, (208.5-215.1) . Quebrada Yutupiza, Rio Maranon dr. LACM 36337-10, 1, (159.4) . Rio Cenepa, Rio Maranon dr. near San Antonio, LACM 39638-3, 3, 1 cs, (94.2-202.8) . Rio Huampani, Rio Maranon dr. Maja Quebrada, LACM 36359-2, 1, (228.0) . Rio Maranon , Rio Amazonas dr. at and across from Sta. Maria de Nieva and confluence of Rio Nieva, FMNH 97017, 2, (110.6-131.9) . Rio Santiago, Rio Maranon dr. at La Poza, LACM 41724-17, 1, (131.5) , LACM 41723-10, 1, (130.5) , LACM 41729-39, 1, (147.7) , LACM 41730-11, 1, (128.8) , LACM 39883-11, 3, 1 cs, (137.9-170.8) . Huanaco :, Rio Huallaga, Rio Ucayali dr. at Tingo Maria, CAS 56754, 2, 1 cs, (79.6-86.1) and CAS 95117, 2, 1 cs, (69.7-160.5) . Rio Rondos, Rio Monzon dr. vicinity of Tingo Maria, just above new bridge site, ANSP 38873 (none measured) . Loreto : Rio Amazonas, Atlantic Ocean dr. INHS 39358 (none measured) . Rio Amazonas, Atlantic Ocean dr. 21.1 mi NE Iquitos bearing 22°, 03°30’30”S , 73°03’28”W , INHS 39122 (65.2) . Rio Amazonas, Atlantic Ocean dr. at Pueblo Gallito, INHS 36939, 1, (80.3) . Rio Itaya, Rio Amazonas dr. approx. 10 km S Santa Clara, INHS 36877, 1, (94.8) . Rio Nanay, Rio Amazonas dr. well above Morona cocha, ANSP 38874 (none measured) . Rio Napo, Rio Amazonas dr. at Mazan, INHS 36565 (none measured) . Madre de Dios:, Cano Pachija, Rio Madre de Dios dr. Manu National Park, Pakitza, from mouth to 7 km upstream, USNM 319601, (81.2) . Cano Picaflor, Rio Madre de Dios dr. Pakitza, Cana Brava Trail #19, USNM 319353, 1, (114.1) . Tributary, Rio Tambopata - Rio Madre de Dios dr. stream enters Rio Tambopata from S bank approximately 500 m downstream of Explorer’s Inn boat landing, 12°49’35”S , 69°17’30”W , USNM 264049, 1, (178.5) . Tributary to Rio Madre de Dios, on S side about 10 km downstream of junction of Rio Tambopata and Rio Madre de Dios, 12°30’S , 69°10’W , USNM 263911, 1, (130.1) . Tributary, Rio Tambopata - Rio Madre de Dios dr. second stream entering Rio Tambopata on SW shore upstream of mouth of Rio La Torre, 12°49’40”S , 69°18’W , USNM 264050, 2, (143.0-202.6) . Diagnosis: Hypostomus pyrineusi is distinguished from most members of the H. cochliodon group except some H. cochliodon , H. levis , H. ericius , H. oculeus , and H. taphorni by having 0-10 (usually 0; Fig. 2B) odontodes on the opercle (vs. 11 or more). Hypostomus pyrineusi further differs from H. hemicochliodon and H. sculpodon by lacking a ridge on the pterotic-supracleithrum (Fig. 5B), by the presence of large, spoonshaped teeth (vs. teeth intermediate; Fig. 1C vs. B), and a lack of a buccal papilla; from H. ericius , H. hemicochliodon , H. oculeus , and H. sculpodon by lacking strong, sharp keels on the lateral plates; from H. levis by having an adipose fin; from H. cochliodon by having the spots more numerous and close-set on the body (vs. spots absent or widely spaced); and from H. taphorni by having pigmentation on the lobes of the caudal fin equally distributed (vs. lower lobe darker than upper). Description: See Hypostomus cochliodon group description for more details. Morphometric data given in Table 5. Body typically almost entirely dark brown with medium to large spots present. Spots on head fairly large when compared to those of H. hondae , H. pagei , and H. taphorni . Spots increasing in size and fading posteriorly, absent on caudal peduncle. Spots on abdomen typically large, some specimens with medium-sized spots, spots never as small as in H. taphorni ; (Fig. 22). Spots occasionally absent and entire fish dark brown (almost black). Caudal fin may be entirely spotted, but caudal-fin membranes and rays typically black or black distally and light proximally; caudal-fin spines typically spotted although some specimens with entirely black caudal-fin spines; caudal fin not bicolored. Abdomen colored as sides, sometimes slightly lighter. Color in juveniles as in adults, but spots comparatively larger and abdomen generally white and unspotted. Dorsal fin short, rarely reaching preadipose plate when depressed. Depressed pectoralfin spine ventral to pelvic fin reaches 2-3 plates beyond pelvic-fin rays. Tip of pectoral-fin spine of nuptial males with stout, recurved, hypertrophied odontodes. Keels weak to moderately developed. Orbits forming moderate ridge slightly raised above medial surface of head; ridges of dorsal and lateral aspect of head fairly well-developed. Longitudinal ridge on pterotic-supracleithrum beginning at posterodorsal corner of eye formed from raised bone and slightly larger odontodes absent. Opercle usually supporting no odontodes, but occasionally one to three odontodes are present. Nuptial body odontodes present (Fig. 2B). Plates in skin anterior to dorsal-fin spine absent or few (Fig. 6A; Table 7). Each jaw with 5-14 teeth (mode = 8), teeth large and spoon-shaped. Average angle between dentaries 55° (SD = 7°; range: 43°-69°, N=30). Lateral line plates 26-31; dorsal plates 8-9; interdorsal plates 4-7; adipose caudal plates 9-16. Range: Found in the Rio Madeira drainage of Bolivia and Brazil, the Rios Napo, Ucayali, Maranon and upper Rio Amazonas drainage of Peru, and the Rio Napo drainage of Ecuador, (Fig. 8). Hypostomus pyrineusi is sympatric with H. ericius , H. hemicochliodon , and H. oculeus and is potentially sympatric with H. levis .