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Fig. 1 in Rare Snakes-Five New Species from Eastern Panama: Reviews of Northern Atractus and Southern Geophis (Colubridae: Dipsadinae)

Fig. 1. Panamanian Atractus: Holotypes in dorsal view. A. A. clarki Dunn and Bailey (MCZ 28800), ×1.0. B. A. darienensis, new species (KU 110274), ×0.8. C. A. depressiocellus, new species (AMNH 119876), ×0.4. D. A. hostilitractus, new species (AMNH 130330), ×0.8. See figure 10 for a fifth Panamanian species (Atractus imperfectus, new species).

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Fig. 2 in Rare Snakes-Five New Species from Eastern Panama: Reviews of Northern Atractus and Southern Geophis (Colubridae: Dipsadinae)

Fig. 2. Panamanian Atractus: Holotypes in ventral view. A. A. clarki. B. A. darienensis. C. A. depressiocellus. D. A. hostilitractus. Specimens shown ×0.4–1.0 as given individually in figure 1. See figure 10 for the fifth Panamanian species (Atractus imperfectus).

Fig. 4 in On the Uniquely Fragmented Distribution of a Rare Panamanian Snake, Dipsas nicholsi (Colubridae: Dipsadinae)

Fig. 4. Camp in tall cloud forest on the Jaqué-Imamadó divide (part of the Serranía de Jingurudó), 800 m elevation, perhaps 8 km distant from the upper scene in figure 3. Trees are unusually tall for a ridgetop forest in eastern Panama. (Photograph by C. W. Myers, April 22, 1967)

Fig. 3 in On the Uniquely Fragmented Distribution of a Rare Panamanian Snake, Dipsas nicholsi (Colubridae: Dipsadinae)

Fig. 3. Diverse habitats of Dipsas nicholsi. Top: Cloud forest (855 m) in the Serranía de Jingurudó, Darién, extreme eastern Panama. (Photograph by Bill Hatcher, August 1997) Bottom: Lowland forest along Camino de Cruces in the former Madden Forest Preserve, in upper Río Chagres drainage of central Panama. (Photograph by Roberto Ibáñez, November 20, 2004)

Fig. 2 in On the Uniquely Fragmented Distribution of a Rare Panamanian Snake, Dipsas nicholsi (Colubridae: Dipsadinae)

Fig. 2. Juvenile specimen (MVUP-1856) of Dipsas nicholsi in dorsal and ventral view, X1.8 (scale divisions 5 mm).

Fig. 1 in On the Uniquely Fragmented Distribution of a Rare Panamanian Snake, Dipsas nicholsi (Colubridae: Dipsadinae)

Fig. 1. Dipsas nicholsi (Dunn), a rarely collected Panamanian snail-eater (MVUP-1856, about X2.6 life size). This specimen, the first known juvenile, provides evidence of a fragmented distribution on the Isthmus of Panama. (From a transparency by Marcos A. Guerra)

Fig. 6 in Morphological Extremes-Two New Snakes of the Genus Atractus from Northwestern South America (Colubridae: Dipsadinae)

Fig. 6. Atractus gigas, new species. Head of holotype (FHGO 194) in dorsolateral view, nearly twice life size (line 5 10 mm). Arrow points to diamond-shaped frontonasal scale between internasal and prefrontal sutures (see also fig. 7).

Fig. 1 in Morphological Extremes-Two New Snakes of the Genus Atractus from Northwestern South America (Colubridae: Dipsadinae)

Fig. 1. Atractus attenuatus, new species. Dorsal and ventral views of the adult male holotype (AMNH R-

Fig. 7 in Morphological Extremes-Two New Snakes of the Genus Atractus from Northwestern South America (Colubridae: Dipsadinae)

Fig. 7. Atractus gigas, new species. Head of holotype (FHGO 194). A. Dorsal view, X1.7. Arrow points to diamond-shaped frontonasal scale between internasal and prefrontal sutures. B. Ventral view, X1.2. Scale divisions 5 mm.

Fig. 5 in Morphological Extremes-Two New Snakes of the Genus Atractus from Northwestern South America (Colubridae: Dipsadinae)

Fig. 5. Atractus gigas, new species. Views of the adult female holotype (FHGO 194), shown much smaller than life (X0.48).

Fig. 3 in Morphological Extremes-Two New Snakes of the Genus Atractus from Northwestern South America (Colubridae: Dipsadinae)

Fig. 3. Everted hemipenis of Atractus attenuatus, new species, in sulcate and asulcate views. Left organ of holotype (AMNH R-19998), X8.9. (Laboratory preparation from hemipenis preserved in retracted condition; fully everted but not necessarily completely expanded.)

Figure 18 in Not so rare snakes: a revision of the Geophis sieboldi group (Colubridae: Dipsadinae) in lower Central America and Colombia

Figure 18. Geographical distribution of Geophis hoffmanni. This species is also known also from 'Colombia' without further locality data. Symbols may indicate more than one locality.

Figure 15 in Not so rare snakes: a revision of the Geophis sieboldi group (Colubridae: Dipsadinae) in lower Central America and Colombia

Figure 15. Geographical distribution of three species of Geophis in western Panama. Geophis tectus sp. nov. is virtually sympatric with G. brachycephalus in the upper Río Chirripó drainage and with G. talamancae near Boquete.

Figure 13 in Not so rare snakes: a revision of the Geophis sieboldi group (Colubridae: Dipsadinae) in lower Central America and Colombia

Figure 13. Multivariate analysis for the five species of the Geophis brachycephalus complex; upper, males; lower, females. GML, Gorgas Memorial Laboratory specimen referred to Geophis tectus sp. nov.

Figure 16 in Not so rare snakes: a revision of the Geophis sieboldi group (Colubridae: Dipsadinae) in lower Central America and Colombia

Figure 16. Geographical distribution of four species of Geophis in Panama and western Colombia. G. betanensis and G. nigroalbus are sympatric in Colombia.

Figure 11 in Not so rare snakes: a revision of the Geophis sieboldi group (Colubridae: Dipsadinae) in lower Central America and Colombia

Figure 11. Multivariate nMDS plot of four populations of the Geophis brachycephalus complex; upper for males, lower for females. 'Stress' is a measure of structure in a nMDS plot, with values <0.2 indicating a meaningful ordination. 'Inquirenda' indicates the position of specimens we refer to Geophis, species inquirenda with respect to individuals from the other four populations (CR, Costa Rica; Boq, Boquete; Ler, Lérida; Col, Colombia). Characters included in analysis were tail length/total length ratios, scale counts (ventral and subcaudal) and dorsal colour pattern.

Figure 9 in Not so rare snakes: a revision of the Geophis sieboldi group (Colubridae: Dipsadinae) in lower Central America and Colombia

Figure 9. Comparison of variation in total segmental counts in four population samples of the Geophis brachycephalus complex.

Figure 7 in Not so rare snakes: a revision of the Geophis sieboldi group (Colubridae: Dipsadinae) in lower Central America and Colombia

Figure 7. Sexual dimorphism in extent of keeling on dorsal scales in three population samples of the Geophis brachycephalus complex.

Figure 17 in Not so rare snakes: a revision of the Geophis sieboldi group (Colubridae: Dipsadinae) in lower Central America and Colombia

Figure 17. Geographical distribution of two species of Geophis in Nicaragua and Costa Rica. Symbols may indicate more than one locality.

Figure 4 in Not so rare snakes: a revision of the Geophis sieboldi group (Colubridae: Dipsadinae) in lower Central America and Colombia

Figure 4. Dorsal patterns in Geophis: A, dorsal pattern of G. betaniensis; B, dark transverse bands typical of Geophis dunni.