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FIGURE 3 in A new species of pine anole from the Sierra Madre del Sur in Oaxaca, Mexico (Reptilia, Squamata, Dactyloidae: Anolis)

FIGURE 3. Hemipenis of (A) Anolis peucephilus (SMF 96370); (B) A. omiltemanus (SMF 96226); sulcate view left, asulcate view right. Scale bars equal

FIGURE 6 in A new species of pine anole from the Sierra Madre del Sur in Oaxaca, Mexico (Reptilia, Squamata, Dactyloidae: Anolis)

FIGURE 6. Anolis peucephilus: dorsal scalation in (A) SMF 96369; (B) SMF 96370; flank scalation in (C) SMF 96369; (D) SMF 96368; ventral scalation in (E) SMF 96369; (F) SMF 96370. Scale bars equal 1.0 mm.

FIGURE 2 in A new species of pine anole from the Sierra Madre del Sur in Oaxaca, Mexico (Reptilia, Squamata, Dactyloidae: Anolis)

FIGURE 2. Dewlaps of Anolis peucephilus in life. (A) SMF 96370 (male paratype); (B) SMF 96368 (male holotype); (C) SMF 96369 (female paratype); (D) GK-4467 (female paratype).

FIGURE 1 in A new species of pine anole from the Sierra Madre del Sur in Oaxaca, Mexico (Reptilia, Squamata, Dactyloidae: Anolis)

FIGURE 1. Anolis peucephilus in life. (A,B) SMF 96368 (male holotype); (C) SMF 96370 (male paratype); (D) GK-4137 (male paratype); (E) GK-4467 (female paratype); (F) SMF 96369 (female paratype).

FIGURE 4 in A new species of Rhadinella (Serpentes: Colubridae) from the Sierra Madre del Sur of Guerrero, Mexico

FIGURE 4. Landscape view taken of type-locality of Rhadinella dysmica, looking north from Cuajilotla, Guerrero, Mexico, showing tropical deciduous forest.

FIGURE 3 in A new species of Rhadinella (Serpentes: Colubridae) from the Sierra Madre del Sur of Guerrero, Mexico

FIGURE 3. Dorsal (A) and (B) lateral aspects of Rhadinella schistosa (FMNH 100297, paratype) from Cuautlapan, Veracruz, Mexico, showing incomplete collar across nape. Head length 6.5 mm.

FIGURE 1 in A new species of Rhadinella (Serpentes: Colubridae) from the Sierra Madre del Sur of Guerrero, Mexico

FIGURE 1. Dorsal view in life of the holotype of Rhadinella dysmica (ENCB 18951) from near Cueva de Tepozonales, Cuajilotla, 20 km S Mochitlán, Guerrero, Mexico. Snout-vent length 256 mm, total length 341+N mm.

FIGURE 2 in A new species of Rhadinella (Serpentes: Colubridae) from the Sierra Madre del Sur of Guerrero, Mexico

FIGURE 2. Dorsal (A), lateral (B), and ventral (C) views of head of the holotype of Rhadinella dysmica (ENCB 18951). Head length 9.5 mm. Photos by N. V. López Valentín.

FIGURE 11 in A New Species Of Neotropical Freshwater Stingray Of The Genus Potamotrygon Garman, 1877 From The Río Madre De Díos, Peru (Chondrichthyes: Potamotrygonidae)

FIGURE 11: Morphological details of hyomandibular arch of Potamotrygon tatianae sp. nov. (based on MZUSP 107670, male, 300 mm DW). Abbreviations: aac, anterior angular cartilage; hyo, hyomandibula; Mc, Meckel's cartilage; pac, posterior angular cartilage; pq, palatoquadrate; ptp, posterior triangular projection.

FIGURE 13 in A New Species Of Neotropical Freshwater Stingray Of The Genus Potamotrygon Garman, 1877 From The Río Madre De Díos, Peru (Chondrichthyes: Potamotrygonidae)

FIGURE 13: Specimen of Potamotrygon falkneri (ANSP 142483, male, 265 mm DW) in dorsal (A) and ventral (B) views (Río Manu below Boca Pinquén, Río Madre de Díos, Río Madeira basin, Peru).

FIGURE 12 in A New Species Of Neotropical Freshwater Stingray Of The Genus Potamotrygon Garman, 1877 From The Río Madre De Díos, Peru (Chondrichthyes: Potamotrygonidae)

FIGURE 12: Map showing geographic distribution of Potamotrygon tatianae sp. nov. Star indicates collection locality of specimens and all of type-species.

FIGURE 9 in A New Species Of Neotropical Freshwater Stingray Of The Genus Potamotrygon Garman, 1877 From The Río Madre De Díos, Peru (Chondrichthyes: Potamotrygonidae)

FIGURE 9: Ventral lateral line canal system of Potamotrygon tatianae sp. nov. (MZUSP 107669, male, 293 mm DW). Prenasal canal is not depicted in figure. A) Overall canal arrangement. B) Anterior disc region amplified highlighting separate components of canals. Abbreviations: ast, anterior subpleural tubules; hjc, hyomandibular jugular component; hsc, hyomandibular subpleural component; hyoc, hyomandibular canal; ioc, infraorbital canal; iol, infraorbital loop; jug, jugular canal; man, mandibular canal; nas, nasal canal; ocs, orbitonasal component of supraorbital canal; pnl, prenasal loop; pst, posterior subpleural tubule; sci, suborbital component of infraorbital canal; soc, supraorbital canal; sol, suborbital loop; spl, subpleural loop.

FIGURE 8 in A New Species Of Neotropical Freshwater Stingray Of The Genus Potamotrygon Garman, 1877 From The Río Madre De Díos, Peru (Chondrichthyes: Potamotrygonidae)

FIGURE 8: Dermal denticles of Potamotrygon tatianae sp. nov., in dorsal view, from mid region of back. A) Denticle arrangement. B) Individual dermal denticle amplified. Abbreviations: cd, crown dichotomy; cp, crown plate; cr, crown ridge.

FIGURE 5 in A New Species Of Neotropical Freshwater Stingray Of The Genus Potamotrygon Garman, 1877 From The Río Madre De Díos, Peru (Chondrichthyes: Potamotrygonidae)

FIGURE 5: Specimen of Potamotrygon tatianae sp. nov. (MZUSP 107671, male, 351 mm DW) photographed upon capture in the field (Río Madre de Díos, Peru). Courtesy of F. Reyda.

FIGURE 6 in A New Species Of Neotropical Freshwater Stingray Of The Genus Potamotrygon Garman, 1877 From The Río Madre De Díos, Peru (Chondrichthyes: Potamotrygonidae)

FIGURE 6: Morphological details of Potamotrygon tatianae sp. nov. A) Eyes and spiracles of holotype (MZUSP 107673, male, 348 mm DW). B) Nasoral region of paratype (MZUSP 107667, male, 362 mm DW).

FIGURE 10 in A New Species Of Neotropical Freshwater Stingray Of The Genus Potamotrygon Garman, 1877 From The Río Madre De Díos, Peru (Chondrichthyes: Potamotrygonidae)

FIGURE 10: Dorsal (A), ventral (B), lateral (C) and posterior (D) views of neurocranium of Potamotrygon tatianae sp. nov. (MZUSP 107671, male, 351 mm DW). Abbreviations: acv, anterior cerebral vein foramen; ac, anterior foramen for preorbital canal; anc, antorbital cartilage condyle; as, articular surface; elf, endolymphatic foramen; es, eye-stalk; saf, efferent spiracular artery foramen; fpf, frontoparietal fontanelle; fm, foramen magnum; hmf, hyomandibular facet; ic, internal carotid artery foramen; lc, lateral commisure; nc, nasal capsule; obf, orbital fissure; oc, occipital condyle; pcf, precerebral fontanelle; pc, posterior foramen for preorbital canal; plf, perilymphatic foramen; pop, postorbital process; pq, palatoquadrate; prp, preorbital process; soc, supraorbital crest; sp, supraorbital process; sup, superficial ophthalmic nerve foramina; II, optic nerve foramen; III, oculomotor nerve foramen; VII, hyomandibular branch of facial nerve foramen; IX, glossopharyngeal nerve foramen; X, vagus nerve foramen.

FIGURE 2 in A New Species Of Neotropical Freshwater Stingray Of The Genus Potamotrygon Garman, 1877 From The Río Madre De Díos, Peru (Chondrichthyes: Potamotrygonidae)

FIGURE 2: Paratype of Potamotrygon tatianae sp. nov. (MZUSP 107667, male, 362 mm DW) in dorsal (A) and ventral (B) views (Río Madre de Díos, Peru).

FIGURE 4 in A New Species Of Neotropical Freshwater Stingray Of The Genus Potamotrygon Garman, 1877 From The Río Madre De Díos, Peru (Chondrichthyes: Potamotrygonidae)

FIGURE 4: Specimen of Potamotrygon tatianae sp. nov. (MZUSP 107672, male, 291 mm DW) in dorsal (A) and ventral (B) views (Río Madre de Díos, Peru).

FIGURE 3 in A New Species Of Neotropical Freshwater Stingray Of The Genus Potamotrygon Garman, 1877 From The Río Madre De Díos, Peru (Chondrichthyes: Potamotrygonidae)

FIGURE 3: Paratype of Potamotrygon tatianae sp. nov. (MZUSP 107668, female, 265 mm DW) in dorsal (A) and ventral (B) views (Río Madre de Díos, Peru).

FIGURE 1 in A New Species Of Neotropical Freshwater Stingray Of The Genus Potamotrygon Garman, 1877 From The Río Madre De Díos, Peru (Chondrichthyes: Potamotrygonidae)

FIGURE 1: Holotype of Potamotrygon tatianae sp. nov. (MZUSP 107673, male, 348 mm DW) in dorsal (A) and ventral (B) views (Río Madre de Díos, Peru).