A histochemical study of the pectoralis muscle of the south indian flying lizard,Draco dussumieri

John, K. O.

doi:10.1007/bf02147573

Cited by 5 publications

(8 citation statements)

References 2 publications

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“…Draco lizards actively deploy two aerodynamic force-producing structures in flight: rib- with a number of specializations that contribute to its role as a force-producing structure (Colbert 1967, John 1970. The major passive mechanical components that form the wing include 5-7 elongated ribs, ligaments, bands of collagen, integument, and raised scale rows.…”

Section: Mccay (2001) Investigated the Basis Of This Maneuverability mentioning

confidence: 99%

How animals glide: from trajectory to morphology

et al. 2015

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Animals that glide produce aerodynamic forces that enable transit through the air in both arboreal and aquatic environments. The relative ease of gliding compared with flapping flight has led to a large diversity of taxa that have evolved some degree of flight capability. Glide paths are curved, reflecting the changing forces on the animal as it progresses through its aerial trajectory. These changing forces can be under control of the glider, which uses specific aspects of anatomy to modulate lift, drag, and rotational moments on the body. However, gliders share no single anatomical or behavioral feature, and some species are unspecialized for gliding, producing aerodynamic forces using posture and orientation alone. Animals use gliding in a broad range of ecological roles, suggesting that multiple performance metrics are relevant for consideration, but we are only beginning to understand how gliders produce and control their flight from takeoff to landing. In this review, we focus on the physical aspects of how glide trajectories are produced, and additionally discuss the range of morphologies and postures that are used to control aerial movements across the broad diversity of animal gliders.

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Section: Mccay (2001) Investigated the Basis Of This Maneuverability mentioning

confidence: 99%

How animals glide: from trajectory to morphology

et al. 2015

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“…Flying lizards have several morphological and physiological modifications related to gliding habits (John, 1966(John, , 1970a(John, , 1971aColbert, 1967;Gaur, 1971). Assuming that selection for differential gliding performance between sexes has promoted the reversed sexual dimorphism, it is likely that this selection has also been differentially related to aerodynamic performance and wing morphology in the sexes.…”

mentioning

confidence: 99%

A Preliminary Study of Sexual Dimorphism in Wing Morphology of Five Species of the Flying Lizards, Genus <i>Draco</i>

Mori¹,

Hikida²

1992

Jpn.J.Herpetol.

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Abstract:Sexual size dimorphism was examined for five species of flying lizards, genus Draco, from Southeast Asia. Female SVL was larger than male SVL in three species.This sexual size dimorphism may be related to differences in gliding performance between males and females.Quantitative characters of wings such as wing shape and wing loading were compared between the sexes within each species. Significant sexual dimorphism was found in five characters.

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“…The most common patagium supports represented in extinct reptiles are elongated dorsal ribs (e.g., Kuehneosauridae, Mecistotrachelos apreoros, Xianglong zhaoi) that extend laterally or posterolaterally from their articulations with trunk vertebrae. A rib-supported Manuscript to be reviewed patagium is also present in the extant gliding iguanians of the genus Draco of southeast Asia (e.g., Colbert, 1967;John, 1970;Russell and Dijkstra, 2001). The patagial supports would have prevented curling-up of the lateral edges of the patagial membrane during gliding, which would have decreased the surface area of the patagium and reduce its aerodynamical performance (Frey et al, 1997).…”

Section: Comparative and Functional Morphology Of The Gliding Membrane In Weigeltisauridaementioning

confidence: 99%

“…Colbert (1967) did not note any muscular tissue framing the outer perimeter of the patagium, and Russell and Dijkstra ( 2001) described a collagen-rich band extending between the tips of the patagial ribs. However, John (1970) described a muscular expansion of the protracting muscles at the anterior margin of the patagium that extends along the perimeter of the wing. It is not clear if these discrepancies are a result of the contrasting interpretations of the authors or genuine differences between species of Draco.…”

Section: Comparative and Functional Morphology Of The Gliding Membrane In Weigeltisauridaementioning

confidence: 99%

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Peer Review #3 of "Osteology, relationships and functional morphology of Weigeltisaurus jaekeli (Diapsida, Weigeltisauridae) based on a complete skeleton from the Upper Permian Kupferschiefer of Germany (v0.2)"

Buffa¹

2021

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Background.Weigeltisauridae is a clade of small-bodied diapsids characterized by a horned cranial frill, slender trunk and limbs, and a patagium supported by elongated bony rods. Partial skeletons and fragments are definitively known only from upper Permian (Lopingian) rocks in England, Germany, Madagascar, and Russia. Despite these discoveries, there have been few detailed descriptions of weigeltisaurid skeletons, and the homologies of many skeletal elements-especially the rods supporting the patagium-remain the subject of controversy. Materials & Methods. Here, we provide a detailed description of a nearly complete skeleton of Weigeltisaurus jaekeli from the upper Permian (Lopingian: ?Wuchiapingian) Kupferschiefer of Lower Saxony, Germany. Briefly addressed by past authors, the skeleton preserves a nearly complete skull, postcranial axial skeleton, appendicular skeleton, and patagial supports. Through comparisons with extant and fossil diapsids, we examine the hypotheses for the homologies of the patagial rods. To examine the phylogenetic position of Weigeltisauridae and characterize the morphology of the clade, we integrate the material and other weigeltisaurids into a parsimony-based phylogenetic analysis focused on Permo-Triassic non-saurian Diapsida and early Sauria (61 taxa, 339 characters). Results. We recognize a number of intriguing anatomical features in the weigeltisaurid skeleton described here, including hollow horns on the post-temporal arch, lanceolate teeth in the posterior portion of the maxilla, the absence of a bony arch connecting the postorbital and squamosal bones, elongate and slender phalanges that resemble those of extant arboreal squamates, and patagial rods that are positioned superficial to the lateral one third of the gastral basket. Our phylogenetic study recovers a monophyletic Weigeltisauridae including Coelurosauravus

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A histochemical study of the pectoralis muscle of the south indian flying lizard,Draco dussumieri

Cited by 5 publications

References 2 publications

How animals glide: from trajectory to morphology

How animals glide: from trajectory to morphology

A Preliminary Study of Sexual Dimorphism in Wing Morphology of Five Species of the Flying Lizards, Genus <i>Draco</i>

Peer Review #3 of "Osteology, relationships and functional morphology of Weigeltisaurus jaekeli (Diapsida, Weigeltisauridae) based on a complete skeleton from the Upper Permian Kupferschiefer of Germany (v0.2)"

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