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101 results for “snake evolution”
Figure 3 from: Amarasinghe A, Karunarathna D, Campbell P, Ineich I (2015) Systematics and ecology of Oligodon sublineatus Duméril, Bibron & Duméril, 1854, an endemic snake of Sri Lanka, including the designation of a lectotype. Zoosystematics and Evolution 91(1): 71-80. https://doi.org/10.3897/zse.91.4971
Figure 3 - Distribution pattern of Oligodon sublineatus: blue dots, previous records and red dots, our observations; major towns are displayed on the map (map source: Cooray 1967).
Figure 2 from: Amarasinghe A, Karunarathna D, Campbell P, Ineich I (2015) Systematics and ecology of Oligodon sublineatus Duméril, Bibron & Duméril, 1854, an endemic snake of Sri Lanka, including the designation of a lectotype. Zoosystematics and Evolution 91(1): 71-80. https://doi.org/10.3897/zse.91.4971
Figure 2 - Oligodon sublineatus male, NMSL 5161 collected from Nuwara Eliya (1600 m a.s.l.), Sri Lanka: A dorsal aspect of head B ventral aspect of head C lateral aspect of head D lateral aspect of midbody E dorso-lateral aspect of right hemipenis (scale = 1 mm).
Figure 1 from: Amarasinghe A, Karunarathna D, Campbell P, Ineich I (2015) Systematics and ecology of Oligodon sublineatus Duméril, Bibron & Duméril, 1854, an endemic snake of Sri Lanka, including the designation of a lectotype. Zoosystematics and Evolution 91(1): 71-80. https://doi.org/10.3897/zse.91.4971
Figure 1 - A live male of Oligodon sublineatus (not collected) at Sinharaja Forest Reserve, Sri Lanka (photo: H. Jayasinghe).
Supplementary material 1 from: Šmíd J, Fernández SM, Elmi HSA, Mazuch T (2023) Diversity of Sand Snakes (Psammophiidae, Psammophis) in the Horn of Africa, with the description of a new species from Somalia. Zoosystematics and Evolution 99(2): 345-361. https://doi.org/10.3897/zse.99.101943
List of Psammophis species and samples included in the phylogenetic analysis
Data from: Postnatal ontogeny and the evolution of macrostomy in snakes
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Data from: Trophic specialisation drives morphological evolution in sea snakes
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Data from: Domain loss facilitates accelerated evolution and neofunctionalization of duplicate snake venom metalloproteinase toxin genes
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Data from: Has snake fang evolution lost its bite? New insights from a structural mechanics viewpoint
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Data from: Evolution of the snake body form reveals homoplasy in amniote Hox gene function
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Data from: Does aquatic foraging impact head shape evolution in snakes?
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Data from: Cranial ontogeny of Thamnophis radix (Serpentes: Colubroidea) with a re-evaluation of current paradigms of snake skull evolution
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Data from: Evolution of extreme ontogenetic allometric diversity and heterochrony in pythons, a clade of giant and dwarf snakes
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Data from: Coral snakes predict the evolution of mimicry across New World snakes
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Reorganization of HoxD regulatory landscapes during the evolution of a snake-like body plan
GEO Series GSE79048. Mus musculus; Pantherophis guttatus. 25 samples. Type: Other; Genome binding/occupancy profiling by high throughput sequencing.
Reorganization of HoxD regulatory landscapes during the evolution of a snake-like body plan (ChIP-seq)
GEO Series GSE79047. Mus musculus; Pantherophis guttatus. 9 samples. Type: Genome binding/occupancy profiling by high throughput sequencing.
Figure 1 from: Rödel M, Kucharzewski C, Mahlow K, Chirio L, Pauwels OSG, Carlino P, Sambolah G, Glos J (2019) A new stiletto snake (Lamprophiidae, Atractaspidinae, Atractaspis) from Liberia and Guinea, West Africa. Zoosystematics and Evolution 95(1): 107-123. https://doi.org/10.3897/zse.95.31488
Figure 1 Life coloration of the Atractaspisbranchi sp. n. holotype (ZMB 88529).
Reorganization of HoxD regulatory landscapes during the evolution of a snake-like body plan (4C-seq)
GEO Series GSE79045. Pantherophis guttatus; Mus musculus. 16 samples. Type: Other.
Ecological associations with arboreality during the evolution of body shape in Neotropical colubrid and dipsadid snakes
<p>Morphological evolution is frequently associated with ecological diversification, and ecomorphological patterns often express functional relationships involved in the range of tasks a group of individuals performs in a given environment. In some snakes, morphological traits related to locomotion seem to converge in association with an arboreal lifestyle, although such ecomorphological associations so far have not been described for species-rich lineages such as Colubridae and Dipsadidae. In addition to microhabitat usage, body shape may differ according to activity period if the surface area-to-volume (S/V) ratio differs between diurnal and nocturnal species. In this study, we address evolution of body shape in Colubridae and Dipsadidae from these two perspectives. We measured 61 species of Colubridae and Dipsadidae and classified snakes according to the arboreality degree based on the level of gravity exposure: non-scansorial (terrestrial), eurytopical (broadly arboreal/terrestrial) and stenotopical (narrowly adapted arboreal); and also, according to the activity period as diurnal or nocturnal. We predicted that higher degrees of arboreality and nocturnality represent derived states that evolved in association with slender and narrower bodies with longer tails, and consequently increased S/V ratios. Our ancestral reconstructions suggest that specializations towards arboreality and nocturnality evolved more recently during the diversification processes of these colubrids and dipsadids snakes. Most morphological traits of stenotopical species were similar to those of eurytopical ones, and only differed in relation to non-scansorial snakes, and body tapering in the anterior body region differed between non-scansorial and eurytopical species. We did not identify any morphological associations with activity period, suggesting that body shape in colubrid and dipsadid snakes evolved mostly associated to different degrees of specialization to arboreal habitats.</p>
Figure 7 in Systematic revision of the early Miocene fossil Pseudoepicrates (Serpentes: Boidae): implications for the evolution and historical biogeography of the West Indian boid snakes (Chilabothrus)
Figure 7. Close up of the zygosphene of different boine vertebrae. Note the differences between the median lobe and lateral lobe of the specimens. A, mid-precloacal vertebra of Chilabothrus angulifer (AMNH 77596); B, Chilabothrus inornatus (MCZ 2341); C, mid-precloacal vertebra of 'barbouri' (= P. stanolseni) material (MCZ 1978); D, mid-precloacal vertebra of P. stanolseni (MCZ 2417); E, mid-precloacal vertebra of Epicrates cenchria (MCN PV DR 002); and F, mid-precloacal vertebra of Epicrates crassus (MCN PV DR 003). Abbreviations are given in the relevant section. Scale bar: 2 mm.
Figure 8 in Systematic revision of the early Miocene fossil Pseudoepicrates (Serpentes: Boidae): implications for the evolution and historical biogeography of the West Indian boid snakes (Chilabothrus)
Figure 8. Specimens of Thomas Farm compared with the extant Boa constrictor. Note differences concerning the zygosphene roof and the neural spine morphology. All vertebrae are in dorsal view. A, midtrunk vertebra of 'barbouri' MCZ 1978; B, midtrunk vertebra of B. constrictor MCN. D. 344; C, midtrunk vertebra of P. stanolseni MCZ 2417; D, anterior vertebra paratype of P. stanolseni MCZ 1977; E, anterior vertebra of B. constrictor; F, midtrunk paratype vertebra of P. stanolseni MCZ 1977; G, midtrunk vertebra of P. stanolseni AMNH 7627. Abbreviations are given in the relevant section. Scale bar: 5 mm.
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
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