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Figure 5. a in Morphological and performance modifications in the world's only marine lizard, the Galápagos marine iguana, Amblyrhynchus cristatus

Figure 5. a, LD function for variation in stride kinematics between iguanids, two of the fastest runs for each individual were retained (marine iguana N = 65, black spiny-tailed iguana N = 35, green iguana N = 22). Kernel density ellipses for each species illustrate 90% and 70% of the data distribution. b, loadings for iguanid stride kinematics in (a). c, LD function for variation in stride kinematics between subspecies of marine iguana. d, Loadings for iguanid stride kinematics in (c).

Figure 4. a, linear regression illustrating the relationship between log10 stride length and log10 stride speed. b in Morphological and performance modifications in the world's only marine lizard, the Galápagos marine iguana, Amblyrhynchus cristatus

Figure 4. a, linear regression illustrating the relationship between log10 stride length and log10 stride speed. b, linear regression illustrating the relationship between and log10 stride frequency and log10 stride speed for iguanids.

Figure 3. a, linear discriminant function illustrating shape variation between iguanids. Kernel density ellipses for each species illustrate 90 in Morphological and performance modifications in the world's only marine lizard, the Galápagos marine iguana, Amblyrhynchus cristatus

Figure 3. a, linear discriminant function illustrating shape variation between iguanids. Kernel density ellipses for each species illustrate 90% and 70% of the data distribution. b, graph of morphometric trait loadings from LD analysis.

Figure 1. a in Morphological and performance modifications in the world's only marine lizard, the Galápagos marine iguana, Amblyrhynchus cristatus

Figure 1. a, morphological measurements and landmarks used in video digitization. Also illustrated are the three movements of the femur relative to the pelvis including (b) femur protraction, (c) femur rotation and (d) femur adduction (Supporting Information, Table S15).

Figure 2. a in Morphological and performance modifications in the world's only marine lizard, the Galápagos marine iguana, Amblyrhynchus cristatus

Figure 2. a, body shape and size variation between the marine iguana, green iguana and black spiny-tailed iguana. b, body size and shape variation in subspecies of marine iguana (juveniles excluded). Residual means of morphometric traits are expressed on the iguanid bodies. The ancestral state estimates for body mass are shown along phylogenetic trees. Morphometrics represented include head-neck length (HN), forelimb length (FL), hindlimb length (HL) and tail length (tailL). Iguanid bodies are scaled according to mean weight.

FIGURE 7 in A story of nasal horns: two new subspecies of Iguana Laurenti, 1768 (Squamata, Iguanidae) in Saint Lucia, St Vincent & the Grenadines, and Grenada (southern Lesser Antilles)

FIGURE 7. Holotype and paratype of Iguana iguana sanctaluciae. The holotype MNHN2362 (A, C, D, E) and the paratype MNHN1996.8276 (B) Both specimens collected by Bonnecour(t) in 1850-51 in Saint Lucia. Note the nasals (median and lateral horns), the small subtympanic plate, the low number of small nuchal tubercles, the 7 gular spikes, the prominent oval nostril, the banded body.

FIGURE 14 in A story of nasal horns: two new subspecies of Iguana Laurenti, 1768 (Squamata, Iguanidae) in Saint Lucia, St Vincent & the Grenadines, and Grenada (southern Lesser Antilles)

FIGURE 14. Factorial Correspondence Analysis (FCA) of the genotypes of samples from four populations. Black squares: individuals introduced in Saint Lucia (Iguana rhinolopha) [n=8] circles: individuals endemic to Saint Lucia (Iguana iguana sanctaluciae), with white circles for individuals from Louvet (n=13) and hatched circles for individuals from Grand Anse (n=4); white triangles: individuals endemic to Grenadines (Iguana iguana insularis), [n=4]; and grey stars: individuals from French Guiana (Iguana iguana iguana) [n=7]. Only 7 circles are shown for the 17 'native' individuals from Saint Lucia because many individuals from Louvet and one from Grand Anse had the same genotypes.

FIGURE 4 in A story of nasal horns: two new subspecies of Iguana Laurenti, 1768 (Squamata, Iguanidae) in Saint Lucia, St Vincent & the Grenadines, and Grenada (southern Lesser Antilles)

FIGURE 4. Examples of adult male Iguana iguana insularis ssp. nov. A. Adult male (Palm island) sequenced under the number IGU75 (SVL 41 cm); B and C, adult male (Palm Island) sequenced under the number IGU77 (SVL 45 cm) (Palm Island). Annotations: 1. Small size of subtympanic plate ± 10-20% of the eardrum. 2. Two or three scales of decreasing size anterior to subtympanic plate. 3. Juxtaposed elongated sublabial scales. 4. No apparent swelling of the jowls in breeding males. 5. Median and lateral horns on the snout. 6. Horns with enlarged bases. 7. Oval and prominent nostrils. 8. Brown eyes with visible white. 9. Flat and triangular gular spikes. 10. Seven or eight gular spikes. 11. Scattered nuchal tubercles. 12. Low number of nuchal tubercles. 13. Small size of nuchal tubercles. 14. Orange in dorsal scales in breeding animals. 15. Creamy white dewlap of medium size. 16. Creamy white body with faint to no black banding in old individuals.

FIGURE 2 in A story of nasal horns: two new subspecies of Iguana Laurenti, 1768 (Squamata, Iguanidae) in Saint Lucia, St Vincent & the Grenadines, and Grenada (southern Lesser Antilles)

FIGURE 2. Distribution of the three iguana groups identified by Lazell (1973). Based on a clinal variation of their morphology, Lazell (1973) identified at the beginning of the Sixties 3 groups of the Common Iguana Iguana iguana that he thought to be native in Lesser Antilles. At that time, the central group was known to be present only in Guadeloupe (Les Saintes, Basse-Terre and Grande-Terre). This group is not native and is the descent of invasive common iguanas from French Guiana (Breuil 2016; Vuillaume et al. 2015). Now, however, alien iguanas from Central and South America are present throughout most of this region (van den Burg et al. 2018) except Saint Christopher and Nevis, Petite Terre and some satellites of Saint Barthélemy, Anguilla, and Martinique.