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186 results for “Iguanidae”
FIGURE 11 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 11. Distribution of iguanas on Saint Lucia. Locations are mapped to the nearest 1×1 km square. Data come from Morton et al. (2007). Grey squares, Saint Lucia endemic iguana, Black squares, alien iguana from Central America clade. "False absences" were minimized by interviewing persons about iguana presence in grid squares confirmed independently, through sightings and captures by us, to have iguanas present. We rejected some reported sightings of native iguanas, shown here as open grid squares, as being iguanas captured for food or pets or reports based on misidentification (for example on the islet of Maria Major off the far south of Saint Lucia; J. Lazell, in litt. 2010). Some of the reports that were accepted from the interior of the northern half of Saint Lucia may also be suspect, though they are all below 300 m ASL. These patterns of distribution suggest that the mountainous interior of Saint Lucia may create at least a partial barrier to direct east-west movements of iguanas.
FIGURE 1 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 1. Drawing by Provancher (1890) of a stuffed iguana on Saint Lucia. Provancher identified it as Iguana delicatissima (see text), but the body and tail seem to have vertical black stripes, and there are small and scattered tubercular nape scales, and no subtympanic plate. There is no tympanum and no nasal horns on this drawing, which also shows a forked tongue.
FIGURE 17 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 17. Nesting periods of various iguana populations. Monthly mean precipitation is indicated in mm. Precipitation varies according to altitude and aspect, but the important point is that after a 3 months incubation period, the eclosions occur at the beginning or during the rainy season. The brackets indicate the main laying period for the different species at different insular and continental locations. Note that the nesting period of Iguana iguana sanctaluciae overlaps the laying periods of both Iguana delicatissima and Iguana iguana iguana, which suggests that mating periods could also overlap, potentially enabling all three species to interbreed.
FIGURE 10. Adult breeding males I. iguana sanctaluciae and I 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 10. Adult breeding males I. iguana sanctaluciae and I. rhinolopha. The endemic Saint Lucia horned iguana (I. iguana sanctaluciae, photo from Grand Anse, A) is clearly different from the Central America horned iguana (I. rhinolopha: this specimen was photographed from an introduced population on Sint Maarten by M. Yokoyama, B) by size, body proportion, body colour, size and form of the horns, eye colouration, scalation of the jowls, and dewlap size, colour and form.
FIGURE 12 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 12. Phylogenetic tree. Based on mtDNA of 23 iguanas (21 from this study, 2 from GenBank). Four clades are identified. Iguana delicatissima (AF217783) serves as the outgroup. The monophyly of Lazell's southern Lesser Antilles group, characterised by horns, is described here as two new subspecies Iguana iguana insularis and Iguana iguana sanctaluciae. The horned iguanas from Central America are also considered here as a full species I. rhinolopha. The sister group of I. iguana insularis and Iguana iguana sanctaluciae is I. iguana iguana (based on specimens shown here from French Guiana). This phylogenetic tree shows that I. iguana iguana is present as an invasive alien species in the Grenadines (IGU74) and that there is I. delicatissima mitochondrial DNA in some specimens of I. iguana sanctaluciae. The ML tree with the highest log likelihood is shown. Node supports were indicated by bootstrap values from ML (>70) and posterior probability from BI (>0.95).
FIGURE 15 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 15. Results from the Evanno's Method using the STRUCTURE HARVESTER software. This analysis reveals a maximum likelihood for K=3.
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