FIGURE 1 |
Corydoras iiap, holotype, CIIAP 3906, 55.2 mm SL, San Juan Bautista District, Maynas Province, Loreto Region, Peru, Quebrada Paujil, Iquitos-Nauta Road, km 26.4, lower Río Nanay basin, upper Río Amazonas basin.
FIGURE 2 |
Head osteological pattern in c&s paratype of Corydoras iiap, MNRJ 55393, 50.4 mm SL, showing general morphology in lateral view (A), with the detail of the nasal capsule and lateral ethmoid in dorsolateral perspective (B). Abbreviations: f: frontal, io1–2: infraorbital 1 and 2, le: lateral ethmoid, pal: palatine, pes: pterotic-extrascapular, pso: parieto-supraoccipital, sph: sphenotic. Additional pore of the temporal sensory canal at sphenotic outlined in yellow. Area where the illustrated bones are located in fish’s body marked in red in the miniature photo of a paratype (CIIAP 2913, 55.2 mm SL). Scale bars = 1 mm.
FIGURE 3 |
Dorsal view of the head of a c&s paratype of Corydoras iiap, MNRJ 55393, 50.4 mm SL, showing general osteological pattern, with the detail of (A) the palatine in dorsal view, and of (B) the upper jaw in frontal view (= dorsal view considering everted mouth). Abbreviations: f: frontal, io1–2: infraorbital 1 and 2, le: lateral ethmoid, me: mesethmoid, mx: maxilla, n: nasal, np: nuchal plate, pal: palatine, pes: pterotic-extrascapular, pmx: premaxilla, pso: parieto-supraoccipital, sph: sphenotic. Red arrows indicate laminar process on posterolateral portion of maxilla; green arrow indicates lateroventral process of mesethmoid; yellow arrow indicates posterolateral process of palatine. Dotted line in (A) outlining dorsolateral longitudinal laminar expansion of palatine. Area where the illustrated bones are located in fish’s body marked in red in the miniature photo of a paratype (CIIAP 2913, 55.2 mm SL). Scale bars = 1 mm.
FIGURE 4 |
Infraorbital series in lateral (A)and dorsal (B) views, and (C) suspensorium plus operculum in lateral view of a c&s paratype of Corydoras iiap (MNRJ 55393, 50.4 mm SL). Abbreviations: aa: angulo-articular, d: dentary, hym: hyomandibula, io1–2: infraorbital 1 and 2, iop: interopercle, mp: metapterygoid, op: opercle, pop: preopercle, prh: posterodorsal ridge of hyomandibula, q: quadrate. Red arrows indicate inner laminar expansion of both infraorbitals; yellow and green arrows indicate anteroventral expansion and posterodorsal process of dentary, respectively; orange and blue arrows indicate dorsal laminar expansion and posteroventral process of anguloarticular, respectively. Area where the illustrated bones are located in fish’s body marked in red in the miniature photo of a paratype (CIIAP 2913, 55.2 mm SL). Scale bars = 1 mm.
FIGURE 5 |
Hyoid and branchial arches in a c&s paratype of Corydoras iiap (MNRJ 55393, 41.5 mm SL), showing its general morphology in dorsal view (A), with the detail of the upper tooth plate plus pharyngobranchials (3 and 4) and epibranchials 3 and 4 (B). Area highlighted in red in (A) indicating the position of the bones showed in (B) in the branchial basket. Abbreviations: eb3–4: epibranchial 3 and 4, pb3–4: pharyngobranchial 3 and 4, utp: upper tooth plate. Area where the illustrated bones are located in fish’s body marked in red in the miniature photo of a paratype (CIIAP 2913, 55.2 mm SL). Scale bars = 1 mm.
FIGURE 6 |
Lateral view of (A) the dorsal-fin spine and dorsal view of (B) the right pectoral-fin spine in a c&s paratype of Corydoras iiap (MNRJ 55393, 50.4 mm SL), showing their respective serration patterns. Area where the illustrated bones are located in fish’s body marked in red in the miniature photo of a paratype (CIIAP 2913, 55.2 mm SL). Scale bars = 1 mm.
FIGURE 7 |
Pelvic girdle in a c&s paratype of Corydoras iiap (MNRJ 55393, 50.4 mm SL). Abbreviations: bp: basipterygium, pae: anterior external process, pai: anterior internal process, pi: dorsal ischiac process. Area where the illustrated bones are located in fish’s body marked in red in the miniature photo of a paratype (CIIAP 2913, 55.2 mm SL). Scale bar = 1 mm.
FIGURE 8 |
General morphology of the caudal skeleton in a c&s paratype of Corydoras iiap (MNRJ 55393, 41.5 mm SL), showing the small cartilage (red dotted line) between upper principal and procurrent caudal-fin rays. Abbreviations: ccc: compound caudal centrum, cfr: caudal-fin principal rays, dpcr: dorsal procurrent rays, epu: epural, has: haemal spine, hyp 1–5: hypurals 1 to 5, nes: neural spine, par: parhypural, pu 2–4: preural centra 2 to 4, un: uroneural. Area where the illustrated bones are located in fish’s body marked in red in the miniature photo of a paratype (CIIAP 2913, 55.2 mm SL). Scale bar = 1 mm.
FIGURE 9 |
Ventral surface of body in a c&s paratype of Corydoras iiap (MNRJ 55393, 50.4 mm SL), showing the presence of numerous small irregular platelets bearing odontodes. Area where the illustrated bones are located in fish’s body marked in red in the miniature photo of a paratype (CIIAP 2913, 55.2 mm SL). Scale bar = 1 mm.
FIGURE 10 |
General color pattern in life of Corydoras iiap (CIIAP 2649) in lateral view, showing (A) an adult specimen (52.4 mm SL), (B) a larger juvenile (28.6 mm SL), and (C) a smaller juvenile (19.7 mm SL).
FIGURE 11 |
Uncatalogued aquarium specimens of Corydoras iiap (not measured) showing its color pattern in life under aquarium conditions. Photo by Haakon Haagensen.
FIGURE 12 |
Map showing the geographical distribution of Corydoras iiap (red star: type-locality; white circles: additional records). The symbols may represent more than one locality.
FIGURE 13 |
Collecting sites of Corydoras iiap, upper Río Amazonas basin, Loreto Region, Peru, showing (A) its type-locality, Quebrada Paujil, (B) Quebrada Santa Cruz, (C) Quebrada Pintuyacu, and (D) Quebrada San Pablo. Streams (A) and (B) tributaries of the Río Nanay basin; (C) and (D) tributaries of the Río Itaya basin.