Find research datasets worth reusing

FIGURE 3. A in The masked water snakes of the genus Homalopsis Kuhl & van Hasselt, 1822 (Squamata, Serpentes, Homalopsidae), with the description of a new species

FIGURE 3. A cluster analysis of 95 specimens of Homalopsis. The data set used was the same as that used for the PCA and included: dorsal scale row counts on the forebody, midbody, posterior body; number of prefrontals, preoculars, postoculars, upper labials; upper labials under orbit; upper labials at loreal; loreal condition (single, divided, or fragmented); and ventral pattern. Specimens are listed by museum number with a prefix for the species they represent: hb = H. buccata, hh = H. hardwickii, hn = H. nigroventralis, hm = H. mereljcoxi (new species) hs = H.semizonata.

FIGURE 1 in The masked water snakes of the genus Homalopsis Kuhl & van Hasselt, 1822 (Squamata, Serpentes, Homalopsidae), with the description of a new species

FIGURE 1. Ocular ring morphology in five species of Homalopsis. Scale nomenclature: 1 = preocular, 2 = presubocular, 3 = subocular, 4 = postsubocular, 5 = postocular. A. H. buccata: preocular(s) one or two, presubocular one, subocular(s) present about 50% of the time, postocular(s) one or two, postsubocular one (but may be absent). B. H. hardwickii has the lowest number of scales in the ocular ring of any specimen (or species) examined: preocular one, presubocular not present, subocular not present (upper labial in orbit), postocular one, postsubocular one. C. H. mereljcoxi: preocular one, presubocular one (but may be absent), suboculars two or three (rarely absent or four), upper labial six rarely present in orbit, postoculars two (rarely one), postsubocular one (rarely absent). D. H. nigroventralis has the largest number of scales in the ocular ring: preocular one, presubocular one, suboculars one or two (rarely three), postoculars two or three, postsubocular one. E. H. semizonata has the most consistent number of scales in the ocular ring: preocular one (rarely two), presubocular one, subocular one (rarely does a lower labial enter the orbit as it does in the photo), postocular one, postsubocular one.

FIGURE 2 in The masked water snakes of the genus Homalopsis Kuhl & van Hasselt, 1822 (Squamata, Serpentes, Homalopsidae), with the description of a new species

FIGURE 2. Plots of the principal components (PC) scores on the first two PC axes derived from 11 morphological variables (dorsal scale row counts on the forebody, midbody, posterior body; number of prefrontals, preoculars, postoculars, upper labials; upper labials under orbit; upper labials at loreal; loreal condition; ventral pattern) for 95 specimens of Homalopsis. The square with the central circle is H. hardwickii which associates with H. buccata in this analysis. Plot A compares H. buccata, H. mereljcoxi, and H. hardwickii; Plot B compares H. buccata, H. mereljcoxi, H. hardwickii, and H. semizonata; Plot C compares all five species: H. buccata, H. mereljcoxi, H. hardwickii, H. semizonata, and H. nigroventralis.

FIGURE 5 in The unexpected discovery of blind snakes (Serpentes: Typhlopidae) in Micronesia: two new species of Ramphotyphlops from the Caroline Islands

FIGURE 5. Dorsal (top) and left lateral (bottom) views of the head of the holotype of Ramphotyphlops hatmaliyeb (USNM 558300). The illustration of the scale pattern on the left is based on the free edge of the scale plates. The scale bar represents three millimeters.

FIGURE 4 in The unexpected discovery of blind snakes (Serpentes: Typhlopidae) in Micronesia: two new species of Ramphotyphlops from the Caroline Islands

FIGURE 4. The left protruded hemipenis of Ramphotyphlops adocetus, USNM 558297. The inset shows the tip of the hemipenis.

FIGURE 3 in The unexpected discovery of blind snakes (Serpentes: Typhlopidae) in Micronesia: two new species of Ramphotyphlops from the Caroline Islands

FIGURE 3. The relationship between relative tail length (tail length/total length) and the number of middorsocaudal scales in male and female specimens of Ramphotyphlops adocetus and R. hatmaliyeb.

FIGURE 2 in The unexpected discovery of blind snakes (Serpentes: Typhlopidae) in Micronesia: two new species of Ramphotyphlops from the Caroline Islands

FIGURE 2. Dorsal (top) and left lateral (bottom) views of the head of the holotype of Ramphotyphlops adocetus (USNM 529971). The illustration of the scale pattern on the left is based on the free edge of the scale plates. The scale bar represents three millimeters.

FIGURE 7 in The unexpected discovery of blind snakes (Serpentes: Typhlopidae) in Micronesia: two new species of Ramphotyphlops from the Caroline Islands

FIGURE 7. Radiographs of the head of Ramphotyphlops adocetus: (A) lateral view of USNM 529971, (B) dorsal view of USNM 558296; and the head of R. hatmaliyeb: (C) lateral view of USNM 558300, (D) dorsal view of USNM 558303. The arrows indicate the anterior projection of the premaxilla.

FIGURE 1 in The unexpected discovery of blind snakes (Serpentes: Typhlopidae) in Micronesia: two new species of Ramphotyphlops from the Caroline Islands

FIGURE 1. The location of Ulithi and Ant Atoll in the Caroline Islands. The shaded region encompasses the general area in which blind snakes (not including Ramphotyphlops braminus) are known from the region bordering the western Pacific Ocean.

FIGURE 6 in The unexpected discovery of blind snakes (Serpentes: Typhlopidae) in Micronesia: two new species of Ramphotyphlops from the Caroline Islands

FIGURE 6. Comparison of the head shape and rostral shape of Ramphotyphlops adocetus and R. hatmaliyeb: (A) left lateral view of R. adocetus, USNM 558293, (B) dorsal view of the head of USNM 558293, (C) left lateral view of R. hatmaliyeb, USNM 558306, (D) dorsal view of the head of USNM 558306. The rostral free edge is illustrated in B and D, with the underlying gland row shaded gray.

FIGURE 1 in A molecular and morphological characterization of Oliver's parrot snake, Leptophis coeruleodorsus (Squamata: Serpentes: Colubridae) with the description of a new species from Tobago

FIGURE 1. Phylogenetic relationships within the Leptophis ahaetulla Group as inferred from 1,383 bp of mitochondrial DNA from the concatenated 16S and cytochrome b genes. A 50% majority rule consensus tree from the maximum likelihood analysis is shown. Values above nodes show the parsimony followed by the maximum likelihood bootstrap support values (only values over 50% are shown). Leptophis coeruleodorsus sequences are indicated by the dark, vertical bar.

FIGURE 4 in A molecular and morphological characterization of Oliver's parrot snake, Leptophis coeruleodorsus (Squamata: Serpentes: Colubridae) with the description of a new species from Tobago

FIGURE 4. Known localities of Leptophis coeruleodorsus from Trinidad and Tobago and Venezuela are the white markers. The type locality for Leptophis haileyi is the green marker.

FIGURE 3. A in A molecular and morphological characterization of Oliver's parrot snake, Leptophis coeruleodorsus (Squamata: Serpentes: Colubridae) with the description of a new species from Tobago

FIGURE 3. A comparison of Leptophis coeruleodorsus (CAS 231717 from Trinidad) profile and crown (A & B) with Leptophis haileyi sp. nov. (CAS 245313) profile and crown (C & D). Because Trinidad L. coeruleodorsus can have nine upper labials (a trait we have not found present in the Tobago population), this figure compares L. haileyi sp. nov. with a specimen of L. coeruleodorsus with nine upper labials.

FIGURE 2. A in A molecular and morphological characterization of Oliver's parrot snake, Leptophis coeruleodorsus (Squamata: Serpentes: Colubridae) with the description of a new species from Tobago

FIGURE 2. A. One of the syntypes (UUZM 9) of Coluber ahaetulla Linnaeus, a light vertebral stripe is visible. Photo courtesy of Bob Thomas. B−D.The holotype of Leptophis coeruleodorsus Oliver (AMNH 9022), no light vertebral stripe present. Photo courtesy of David Kizirian.

FIGURE 5. Habitat within 250 m in A molecular and morphological characterization of Oliver's parrot snake, Leptophis coeruleodorsus (Squamata: Serpentes: Colubridae) with the description of a new species from Tobago

FIGURE 5. Habitat within 250 m of the type locality of Leptophis haileyi. Top photograph is the Roxborough River; the bottom photograph is a side stream. Semi-evergreen seasonal forest mixed with bamboo is found in this area.

FIGURE 1. BMNH 1911.9.8.4 in A new species of cat snake (Reptilia: Serpentes: Colubridae: Boiga) from dry forests of eastern Peninsular India

FIGURE 1. BMNH 1911.9.8.4, Boiga flaviviridis sp. nov., holotype. Entire, dorsal and ventral views and profiles of head. P h o t o G. Vo g e l.

FIGURE 2. Above MAD 1913 in A new species of cat snake (Reptilia: Serpentes: Colubridae: Boiga) from dry forests of eastern Peninsular India

FIGURE 2. Above MAD 1913 paratype of Boiga flaviviridis sp. nov., from Udayagiri, Nellore Dist., Andhra Pradesh, India, showing general habitus. Photo S.R. Ganesh. Middle Live specimen of Boiga flaviviridis sp. nov. from Kaigal, India. Photo Ashok Captain. Below BNHS 3343 referred material of Boiga flaviviridis sp. nov., in-life from Sriharikota Island, Nellore district, Andhra Pradesh state, India. Photo S. Sivakumar.

opennotspecifiedDec 2014View details →

FIGURE 6 in Multilocus species delimitation in the Crotalus triseriatus species group (Serpentes: Viperidae: Crotalinae), with the description of two new species

FIGURE 6. Humid oak-pine forest habitat of Crotalus tlaloci sp. nov. at the paratype localities of (a) Los Álamos, near Valle de Bravo, Estado de México; and (b) Arroyo Seco, Michoacán.

opennotspecifiedDec 2014View details →

FIGURE 3 in Multilocus species delimitation in the Crotalus triseriatus species group (Serpentes: Viperidae: Crotalinae), with the description of two new species

FIGURE 3. Geographic distribution of species in the Crotalus triseriatus species group distributed across the Trans-Volcanic Belt. Circled dots indicate type localities. Arrows point to low-elevation depressions that are probable barriers to gene flow. Names of species reflect our proposed taxonomy.