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FIGURE 7 in Taxonomic review of the typical long-snouted species of Corydoras (Siluriformes: Callichthyidae) from the río de La Plata basin

FIGURE 7 | Corydoras aurofrenatus, holotype, CAS 20661, 40.9 mm SL, Paraguay, Aguada, near arroyo Trementina. Dorsal (top), lateral (middle) and ventral (bottom) views. Copyright © California Academy of Sciences, with all rights reserved.

FIGURE 4 in Taxonomic review of the typical long-snouted species of Corydoras (Siluriformes: Callichthyidae) from the río de La Plata basin

FIGURE 4 | Uncatalogued live specimens of Corydoras areio, from the ribeirão dos Veados (= córrego do Veado), rio Taquari basin, Mato Grosso do Sul, Brazil, showing the general color pattern in life of a specimen settled in a biotope aquarium (A), and the main variations observed within the species, (B) densely spotted, (C) moderately spotted, and (D) scarcely spotted. Photos by Hans-Georg Evers (A) and Heriberto Gimênes (B–D).

FIGURE 3 in Taxonomic review of the typical long-snouted species of Corydoras (Siluriformes: Callichthyidae) from the río de La Plata basin

FIGURE 3 | Pectoral-fin spine of cleared-and-stained specimens of Corydoras areio, ZUFMS-PIS 1314, 38.7 mm SL, and Corydoras aurofrenatus, NUP 16191, 38.2 mm SL, showing the well-developed conical serrations directed towards pectoral-spine origin, disposed along the posterior margin of the (A) right spine of C. areio (8.8 mm long) and of the (B) left spine of C. aurofrenatus (8.6 mm long). Yellow arrows indicate serrations that are directed towards tip of spine or perpendicularly directed.

FIGURE 9 in Taxonomic review of the typical long-snouted species of Corydoras (Siluriformes: Callichthyidae) from the río de La Plata basin

FIGURE 9 | Uncatalogued live specimens of Corydoras aurofrenatus, showing (A) a specimen with conspicuous blotches on flanks, said to be from "Paraguay", and (B) a specimen with diffuse pigmentation on flanks, from the rio Amonguijá, Mato Grosso do Sul, Brazil. Photo by Hans-Georg Evers and Heriberto Gimênes, respectively.

FIGURE 6 in Taxonomic review of the typical long-snouted species of Corydoras (Siluriformes: Callichthyidae) from the río de La Plata basin

FIGURE 6 | The typical structure of habitats where Corydoras areio was more frequently observed, showing (A) the ribeirão dos Veados (= córrego do Veado), rio Taquari basin, and (B) the rio Taboco, rio Negro basin, both part of the rio Paraguay drainage in Mato Grosso do Sul, Brazil.

FIGURE 5 in Taxonomic review of the typical long-snouted species of Corydoras (Siluriformes: Callichthyidae) from the río de La Plata basin

FIGURE 5 | Map of geographic distribution of Corydoras areio and C. aurofrenatus from the rio Paraguay basin, in Brazil and Paraguay, respectively: white star and white circles denote the possible type locality and non-type material of C. areio, respectively; black star and red circles denote the type locality and non-type material of C. aurofrenatus, respectively, blue star indicates the type locality of Corydoras ellisae (a junior synonym of Corydoras aurofrenatus). Each symbol may represent more than one locality.

FIGURE 11 in Taxonomic review of the typical long-snouted species of Corydoras (Siluriformes: Callichthyidae) from the río de La Plata basin

FIGURE 11 | Lateral view of the head of (A) Corydoras aurofrenatus (non-type specimen, MTD F 19127, 46.9 mm standard length) and (B) Corydoras negro (holotype, MTD F 28472, 41.8 mm standard length), showing the short opercular membrane of C. aurofrenatus, with anteroventral portion of cleithrum exposed (cep), and the long opercular membrane of C. negro, with anteroventral portion of cleithrum covered (ccv) by it.

FIGURE 8 in Taxonomic review of the typical long-snouted species of Corydoras (Siluriformes: Callichthyidae) from the río de La Plata basin

FIGURE 8 | Color pattern variation in preserved specimens of Corydoras aurofrenatus, showing the intensely pigmented pattern, NUP 16191, 45.8 mm SL, Brazil, Mato Grosso, Rosário do Oeste, córrego Cancela, in dorsal (A) and lateral (C) views, and the diffuse pattern, NRM 23529, 44.6 mm SL, Paraguay, Concepción, arroyo Laguna Penayo, in dorsal (B) and lateral (D) views.

FIGURE 1 in Taxonomic review of the typical long-snouted species of Corydoras (Siluriformes: Callichthyidae) from the río de La Plata basin

FIGURE 1 | Corydoras areio, holotype, MCP 28675 (ex-ZMB 33113), 48.8 mm SL, Brazil, Mato Grosso, tributaries of the córrego Areia. Dorsal (top), lateral (middle) and ventral (bottom) views. Photo by Diogo Araújo.

FIGURE 2 in Taxonomic review of the typical long-snouted species of Corydoras (Siluriformes: Callichthyidae) from the río de La Plata basin

FIGURE 2 | Lateral view of the head of cleared-and-stained specimens of (A) Corydoras areio, ZUFMS-PIS 1314, 38.7 mm SL, and (B) Corydoras aurofrenatus, NUP 16191, 41.6 mm SL. The black lines represent the limits of the bones. Yellow arrows indicate additional pore on the sphenotic bone. Abbreviations: cpt: compound pterotic. Scale bars = 1.0 mm, io1: infraorbital 1, io2: infraorbital 2, ioc: infraorbital canal, iop: interopercle; op: opercle, pop: preopercle, sph: sphenotic.

Fig. 18 in Two fancy spines and a collar: a taxonomic review of the myrmecomorphic spider genus Mazax O. Pickard-Cambridge, 1898 (Araneae: Corinnidae: Castianeirinae) in South America

Fig. 18. Mazax tembe sp. nov. A, C. ♂ (MPEG(ARA)-38432). B, D. ♀ (MPEG(ARA)-38433). A–B. Abdomen, anterior region with abdominal setae, dorsal view (black arrow indicates AS I). C–D. Abdominal setae (black arrows indicate AS I). Scales: A–B 100 µm.

Fig. 17 in Two fancy spines and a collar: a taxonomic review of the myrmecomorphic spider genus Mazax O. Pickard-Cambridge, 1898 (Araneae: Corinnidae: Castianeirinae) in South America

Fig. 17. Mazax tembe sp. nov. A, C, E. ♂ (MPEG(ARA)-38432). B, D, F. ♀ (MPEG(ARA)-38433). A–B. Carapace, dorsal view. C–D. Posterior eye row (PER). E–F. Abdomen, dorsal view. Scales: A–B = 200 µm; C–D = 50 µm; E–F = 500 µm.

Fig. 16 in Two fancy spines and a collar: a taxonomic review of the myrmecomorphic spider genus Mazax O. Pickard-Cambridge, 1898 (Araneae: Corinnidae: Castianeirinae) in South America

Fig. 16. Mazax tembe sp. nov. A–C, J–K. Paratype, ♀ (MPEG(ARA)-38424). D–I. Holotype, ♂ (MPEG(ARA)-38422). A. Dorsal view. B. Lateral view. C. Ventral view. D. Dorsal view. E. Lateral view. F. Ventral view. G. Palp bulb, ventral view. H. Same, retrolateral view. I. Same, with cymbium, retrolateral view. J. Epigyne, ventral view. K. Same, dorsal view. Abbreviations: CD = copulatory duct; CO = copulatory opening; CP = chemocensory patch; E = embolus; FD = fertilization duct; RTA = retrolateral tibial apophysis; ST I = primary spermatheca; ST II = secondary spermatheca. Scales: 0.5 mm.

Fig. 19. A–D in Two fancy spines and a collar: a taxonomic review of the myrmecomorphic spider genus Mazax O. Pickard-Cambridge, 1898 (Araneae: Corinnidae: Castianeirinae) in South America

Fig. 19. A–D. Mazax tembe sp. nov. A–E. ♂ (MPEG(ARA)-38432). F. ♀ (MPEG(ARA)-38434). A. Palp, ventral view. B. Same, with details of embolus. C. Same, with cymbial tip groove. D. Same, with chemosensory patch, dorsal view. E. Same, tibia, ventral view. F. Epigyne, dorso-anterior view. Scales: A = 200 µm; B = 20 µm; C = 100 µm; D–F = 50 µm.

Fig. 14 in Two fancy spines and a collar: a taxonomic review of the myrmecomorphic spider genus Mazax O. Pickard-Cambridge, 1898 (Araneae: Corinnidae: Castianeirinae) in South America

Fig. 14. Mazax mokana sp. nov. A–C, G–H. Paratype, ♀ (IBSP-345142). D–F, I–J. Holotype, ♂ (IBSP-221867). A. Dorsal view. B. Lateral view (black arrow indicates AS II). C. Ventral view. D. Dorsal view. E. Lateral view (black arrow indicates AS II). F. Ventral view. G. Epigyne, ventral view. H. Same, dorsal view. I. Palp, ventral view. J. Same, retrolateral view. Abbreviations: CD = copulatory duct; CO = copulatory opening; CP = chemocensory patch; E = embolus; FD = fertilization duct; RTA = retrolateral tibial apophysis; ST I = primary spermatheca; ST II = secondary spermatheca. Scales: 0.5 mm.

Fig.15 in Two fancy spines and a collar: a taxonomic review of the myrmecomorphic spider genus Mazax O. Pickard-Cambridge, 1898 (Araneae: Corinnidae: Castianeirinae) in South America

Fig.15. Mazax leonidas sp. nov. A–C, G–H. Paratype, ♀ (CEUA-157503). D–F, I–J. Holotype, ♂ (CEUA-157502). A. Dorsal view. B. Lateral view. C. Ventral view. D. Dorsal view. E. Lateral view. F. Ventral view.G. Epigyne, ventral view. H. Same, dorsal view.I. Palp, ventral view.J. Same, retrolateral view. Abbreviations: CD = copulatory duct; CO = copulatory opening; CP = chemocensory patch; E = embolus; FD = fertilization duct; RTA = retrolateral tibial apophysis; ST I = primary spermatheca; ST II = secondary spermatheca. Scales: 2 mm.

Fig. 13 in Two fancy spines and a collar: a taxonomic review of the myrmecomorphic spider genus Mazax O. Pickard-Cambridge, 1898 (Araneae: Corinnidae: Castianeirinae) in South America

Fig. 13. Mazax ramirezi Rubio & Danişman, 2014. A–C. Paratype, ♀ (MACN-Ar-30736). D–J. Paratype, ♂ (MACN-Ar-30733). A. Dorsal view. B. Lateral view. C. Ventral view. D. Dorsal view. E. Lateral view. F. Ventral view. G. Palp, prolateral view. H. Same, ventral view. I. Same, retrolateral view. J. Tibia I, ventral view. Abbreviations: CP = chemocensory patch; E = embolus; RTA = retrolateral tibial apophysis. Scales: 0.2 mm.

Fig. 12 in Two fancy spines and a collar: a taxonomic review of the myrmecomorphic spider genus Mazax O. Pickard-Cambridge, 1898 (Araneae: Corinnidae: Castianeirinae) in South America

Fig. 12. Mazax ramirezi Rubio & Danişman, 2014. A–D, G–H. Holotype, ♀ (MACN-Ar 30732). E. Paratype, ♀ (MACN-Ar-30735). F. Paratype, ♀ (MACN-Ar-30736). A. Dorsal view. B. Lateral view. C. Ventral view. D. Tibia I, ventral view (black arrow indicates unpaired macroseta). E. Tibia I, ventral view. F. Tibia I, ventral view. G. Epigyne, ventral view. H. Same, dorsal view. Abbreviations: CD = copulatory duct, CO = copulatory opening; FD = fertilization duct; ST I = primary spermatheca; ST II = secondary spermatheca. Scales: 0.2 mm.

Fig. 2 in Two fancy spines and a collar: a taxonomic review of the myrmecomorphic spider genus Mazax O. Pickard-Cambridge, 1898 (Araneae: Corinnidae: Castianeirinae) in South America

Fig. 2. Live specimens of the Mazax pax group. A. M. pax Reiskind, 1969 (Mexican variation). B. M. acanthaspis (Simon, 1896). Credits: A. Arthur Anker, B. Leonardo Carvalho.

Fig. 9 in Two fancy spines and a collar: a taxonomic review of the myrmecomorphic spider genus Mazax O. Pickard-Cambridge, 1898 (Araneae: Corinnidae: Castianeirinae) in South America

Fig. 9. Mazax acanthaspis (Simon, 1896) comb. nov., holotype, ♀ (MNHN 10348). A. Carapace, dorsal view. B. Abdomen, dorsal view. C. Abdomen, ventral view. D. Tibia, ventral view. E. Metatarsus, ventral view. F. Original labels. No scales.