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Fig. 8 in A new species of Corydoras Lacépède, 1803 (Siluriformes: Callichthyidae) from the río Madre de Dios basin, Peru

Fig. 8. Color pattern in life of uncatalogued aquarium specimens of (a) Corydoras bondi, (b) Corydoras sipaliwini, and (c) Corydoras coppenamensis.

Fig. 5 in A new species of Corydoras Lacépède, 1803 (Siluriformes: Callichthyidae) from the río Madre de Dios basin, Peru

Fig. 5. Geographical distribution of Corydoras knaacki. Red star represents type-locality, swamps tributaries to the río Inambari, and the black circle, which includes more than one lot, represents the tributaries to the río Manu, río Madre de Dios basin.

Fig. 7 in A new species of Corydoras Lacépède, 1803 (Siluriformes: Callichthyidae) from the río Madre de Dios basin, Peru

Fig. 7. Ontogenetic development of the color pattern in Corydoras knaacki, showing uncatalogued specimens with (a) 10.0 mm SL, (b) 14.0 mm SL, (c) 16.0 mm SL, and (d) 19.0 mm SL. Juveniles in the first six weeks show these typical color patterns until the coloration turns into the adult pattern with a size of 20 mm onwards.

Fig. 4 in A new species of Corydoras Lacépède, 1803 (Siluriformes: Callichthyidae) from the río Madre de Dios basin, Peru

Fig. 4. Color pattern in life of Corydoras knaacki, uncatalogued specimen, 37.0 mm SL, collected with the holotype.

Fig. 3 in A new species of Corydoras Lacépède, 1803 (Siluriformes: Callichthyidae) from the río Madre de Dios basin, Peru

Fig. 3. Pectoral-fin spine of Corydoras knaacki, NUP 17308, 35.9 mm SL, showing the serrations on posterior margin of the right spine (9.6 mm long).

Fig. 2 in A new species of Corydoras Lacépède, 1803 (Siluriformes: Callichthyidae) from the río Madre de Dios basin, Peru

Fig. 2. Lateral view of the head of c&s specimens of Corydoras knaacki, showing the moderately-developed ventral expansion of the infraorbital 1 in (a) NUP 17308, 36.9 mm SL, and (b) NUP 17308, 35.9 mm SL. Additionally, the two variable condition in which (c) the infraorbital 2 do not contact compound pterotic and (d) in which the contact of infraorbital 2 contacts compound pterotic are also displayed. The dotted lines in (c) and (d) represent the suture between sphenotic and compound pterotic. Abbreviations: io1: infraorbital 1, io2: infraorbital 2, sph: sphenotic, cpt: compound pterotic. Scale bar = 1.0 mm.

Fig. 1 in A new species of Corydoras Lacépède, 1803 (Siluriformes: Callichthyidae) from the río Madre de Dios basin, Peru

Fig. 1. Corydoras knaacki, holotype, MUSM 52730, 35.6 mm SL, Peru, Madre de Dios, Santa Rita, swamps in the vicinity of the town of Santa Rita, draining into the río Inambari, río Madre de Dios basin, 12°54.774'S 70°10.624'W. Dorsal (top), lateral (middle) and ventral (bottom) views. Photo by Celso Ikedo.

FIGURE 5 in Redescription of Ancistrus greeni (Siluriformes: Loricariidae), and description of a new species from the río Madre de Dios basin, Peru

FIGURE 5 | Partial map of Peru, showing the collecting sites of Ancistrus greeni (yellow) and Ancistrus maldonadoi (white). Star indicates type locality. Both symbols can represent more than one lot and/or locality.

FIGURE 2 in Redescription of Ancistrus greeni (Siluriformes: Loricariidae), and description of a new species from the río Madre de Dios basin, Peru

FIGURE 2 | Ancistrus greeni, MUSM 57798, 74.8 mm SL, male, río Tono; MUSM 56232, 67.6 mm SL, female, quebrada San Isidro.

FIGURE 1 in Redescription of Ancistrus greeni (Siluriformes: Loricariidae), and description of a new species from the río Madre de Dios basin, Peru

FIGURE 1 | Dorsal, lateral and ventral views (left to right) of Ancistrus greeni: BNHM 1903.10.12.3, female, 51.4 mm SL, lectotype; BNHM 1903.10.12.4, female, 44.8 mm SL, paralectotype.

FIGURE 4 in Redescription of Ancistrus greeni (Siluriformes: Loricariidae), and description of a new species from the río Madre de Dios basin, Peru

FIGURE 4 | Ancistrus maldonadoi, MUSM 57733, holotype, 114.7 mm SL, male, Peru, Manu, río Madre de Dios basin, río Salvación.

FIGURE 3 in Redescription of Ancistrus greeni (Siluriformes: Loricariidae), and description of a new species from the río Madre de Dios basin, Peru

FIGURE 3 | Details of the teeth showing lack of lateral cusp in A. Ancistrus greeni and B. Ancistrus maldonadoi. Bars = 0.1mm.

FIGURE 13 in A new species of Corydoras (Siluriformes: Callichthyidae) from the rio Madre de Dios basin, Peruvian Amazon, with comments on Corydoras aeneus identity

FIGURE 13 | Type specimens of Corydoras aeneus, showing the lectotype (A, USNM 1116) and paralectotypes (B, C, USNM 205649 and USNM 92819, respectively) of Hoplosoma aeneum. Red arrows in C indicates the area affected by a malformation on predorsal region of body. Photographs by Sandra Raredon. Scale bar = 1 mm.

FIGURE 12 in A new species of Corydoras (Siluriformes: Callichthyidae) from the rio Madre de Dios basin, Peruvian Amazon, with comments on Corydoras aeneus identity

FIGURE 12 | Uncatalogued specimens (not measured) of (A) Corydoras hephaestus and (B) C. melanotaenia photographed alive in lateral view, showing general color and morphological patterns. Photograph (A) by Fernando Dagosta and (B) by Robert McLure.

FIGURE 11 in A new species of Corydoras (Siluriformes: Callichthyidae) from the rio Madre de Dios basin, Peruvian Amazon, with comments on Corydoras aeneus identity

FIGURE 11 | Ontogenetic series of Corydoras maclurei (bred under aquarium conditions) showing general changes in external morphology and color pattern in specimens with 8.0 mm TL (A), 12.0 mm TL (B), 16.0 mm TL (C), 21.0 mm TL (D), and 28.0 mm TL (E).

FIGURE 10 in A new species of Corydoras (Siluriformes: Callichthyidae) from the rio Madre de Dios basin, Peruvian Amazon, with comments on Corydoras aeneus identity

FIGURE 10 | Map showing the geographical distribution of Corydoras maclurei (yellow star). The symbol represents more than one locality.

FIGURE 9 in A new species of Corydoras (Siluriformes: Callichthyidae) from the rio Madre de Dios basin, Peruvian Amazon, with comments on Corydoras aeneus identity

FIGURE 9 | Uncatalogued aquarium specimens of Corydoras maclurei (not measured) showing variations of the color pattern in life: specimens can variably present greyish orange (A) or reddish orange (B) ground color of body. In C, the detail of a conspicuously reddish orange dorsal fin. Anterior portion of first dorsolateral body plate typically with orange (D) or yellow (E) bright patch. Photographs (D) and (E) by Ian Fuller.

FIGURE 8 in A new species of Corydoras (Siluriformes: Callichthyidae) from the rio Madre de Dios basin, Peruvian Amazon, with comments on Corydoras aeneus identity

FIGURE 8 | Uncatalogued aquarium specimen of Corydoras maclurei (A) showing its typical color pattern in life (lateral view), collected in its type-locality (B), a small stream tributary to the rio Araza, rio Madre de Dios basin, rio Madeira basin in Peru.

FIGURE 7 in A new species of Corydoras (Siluriformes: Callichthyidae) from the rio Madre de Dios basin, Peruvian Amazon, with comments on Corydoras aeneus identity

FIGURE 7 | Pelvic girdle and caudal skeleton in c&s paratypes of Corydoras maclurei (CITL 430). A. Anterior internal process of basipterygium slightly laterally expanded, and anterior external process not expanded posteriorly (38.2 mm SL); B. Anterior internal process of basipterygium conspicuously laterally expanded, and anterior external process slightly expanded posteriorly (47.8 mm SL); C. General morphology of caudal skeleton, showing the small cartilage (yellow arrow) between upper principal and procurrent caudal-fin rays (38.2 mm SL). Abbreviations: bp: basipterygium, 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, pae: anterior external process, pai: anterior internal process, par: parhypural, pi: dorsal ischiac process, pu 2–4: preural centra 2 to 4, un: uroneural. Red arrows in A and B indicate the dorsal lamina on anterior internal process of basipterygium. Scale bars = 1 mm.

FIGURE 6 in A new species of Corydoras (Siluriformes: Callichthyidae) from the rio Madre de Dios basin, Peruvian Amazon, with comments on Corydoras aeneus identity

FIGURE 6 | Lateral view of (A) the dorsal-fin spine (38.2 mm SL) and dorsal view of (B) the right pectoral-fin spine (47.8 mm SL), showing the serration patterns in c&s paratypes of Corydoras maclurei (CITL 430). Scale bars = 1 mm.