Morphology of setae in regenerating caudal adhesive pads of the gecko Lygodactylus capensis (Smith, 1849)

Alibardi, Lorenzo; Bonfitto, Antonio

doi:10.1016/j.zool.2019.01.003

Cited by 12 publications

(18 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For sensilla with one or two bristles, the latter may be longer or shorter than sensillum diameter (Table 3), but not markedly so. In instances in which sensilla bear three or more bristles, their length is considerably shorter than the diameter of the sensillum they surmount (but see Alibardi and Bonifitto, 2019). Within species the number of bristles per sensillum can vary (Figs.…”

Section: Resultsmentioning

confidence: 99%

Morphology of Cutaneous Sense Organs of Gekkonid Geckos (Squamata: Gekkonidae): Structural Variation in the Most Diverse Gekkotan Family

et al. 2023

View full text Add to dashboard Cite

Cutaneous sensory organs (sensilla) are mechanoreceptive structures present in the skin of squamate reptiles. In gekkotan lizards these structures are characterized by a raised eminence, the button, which bears one or more elongate hair-like bristles as well as a field of shorter spinules. Variation in the dimensions of these structures and in the number and elaborations of the bristles have been well characterized in the limbless pygopodid gekkotans and their tetrapodal relatives in the Diplodactylidae and Carphodactylidae, but patterns of variation in the Gekkonidae, by far the most diverse and species-rich clade of gekkotans, remain unexplored. We used scanning electron microscopy to examine and characterize the sensilla of 47 species representing 11 major clades of gekkonids, as well as representatives of other gecko families. Variation in morphology across gekkonid sensilla exceeds that observed in other gecko families, with bristle number varying from zero to 29 and bristle length from 3 to 50 lm. There is some phylogenetic signal in sensillar morphology, particularly within genera, but there is no association between mechanoreceptor dimensions and overall body size. In some taxa there is evidence that bristle length and bristle number are inversely related. Intraspecific variation in receptor size and configuration, both between individuals and across different body regions, is clearly present but remains insufficiently documented.

show abstract

Section: Resultsmentioning

confidence: 99%

Morphology of Cutaneous Sense Organs of Gekkonid Geckos (Squamata: Gekkonidae): Structural Variation in the Most Diverse Gekkotan Family

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Like in other geckos, a more functional regenerating tail is also present in S . argus (Alibardi & Meyer‐Rochow, 1989, 2017; Alibardi & Bonfitto, 2019; Bauer, 1998). It seems that only some geckos with a broad environmental adaptation including arboreal geckos can regenerate a functional elastic cartilage, but further studies on other species are needed.…”

Section: Discussionmentioning

confidence: 99%

“…In addition to elastic cartilage, numerous meningeal elastic fibrils surround the regenerated spinal cord, allowing tail bending or curling without determining the collapse of the central canal and damaging the ependyma (Alibardi, 1995a). Like in other geckos, a more functional regenerating tail is also present in S. argus (Alibardi & Meyer-Rochow, 1989, 2017Alibardi & Bonfitto, 2019;Bauer, 1998). It seems that only some geckos with a broad environmental adaptation including arboreal geckos can regenerate a functional elastic cartilage, but further studies on other species are needed.…”

Section: Formation Of a Flexible-functional Axial Skeleton In Some Ge...mentioning

confidence: 99%

“…Among lizards, most species of geckos are fast regenerators and regenerate relatively large tails (Boring et al, (1948–49); Furieri, 1956; Hughes & New, 1959; McLean & Vickaryous, 2011; Mufty & Iqbal, 1975; Shah & Chakko, 1968; Werner, 1967). In few species so far documented, the new tail also regains flexibility and manoeuvrability due to the regeneration of an axial cartilaginous tube made of elastic cartilage (Alibardi & Meyer‐Rochow, 1989, 2017; Alibardi & Bonfitto, 2019).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Tail regeneration in the gecko Sphaerodactylus argus shows that the formation of an axial elastic skeleton is functional for the new tail

Alibardi

2022

Acta Zoologica

Self Cite

View full text Add to dashboard Cite

show abstract

“…[ 8 , 9 , 10 , 11 , 12 ]. In a few species of geckos, a number of tail scales also become adhesive, facilitating climbing in an invariably dense canopy of trees [ 13 , 14 , 15 , 16 ].…”

Section: Introduction On Lizard Adhesive Pads and Their Growthmentioning

confidence: 99%

The Periodic Replacement of Adhesive Setae in Pad Lamellae of Climbing Lizards Is Driven by Patterns of Corneous Layer Growth

Alibardi

2022

JDB

Self Cite

View full text Add to dashboard Cite

The adhesive digital pads in some gecko and anoline lizards are continuously utilized for movements on vertical surfaces that may determine wear and a decrease of adhesion efficiency. The pads are formed by lamellae bearing adhesive setae that are worn out following frequent usage and are replaced by new inner setae that maintain an efficient adhesion. Whether the extensive usage of adhesive setae determines a higher shedding frequency in the digital pads with respect to other body regions remains unknown. Setae replacement has been analyzed in embryos and adult lizards using autoradiography and 5BrdU-immunohistochemistry. The observation strongly suggests that during development and epidermal renewal in adult lamellae, there is a shifting of the outer setae toward the apex of the lamella. This movement is likely derived from the continuous addition of proteins in the beta- and alpha-layers sustaining the outer setae while the inner setae are forming. Ultrastructural and in situ hybridization studies indicate that the thin outer beta- and alpha-layers still contain mRNAs and ribosomes that may contribute to the continuous production of corneous beta proteins (CBPs) and keratins for the growth of the free margin at the apex of the lamella. This process determines the apical shifting and release of the old setae, while the new inner setae formed underneath becomes the new outer setae.

show abstract

Morphology of setae in regenerating caudal adhesive pads of the gecko Lygodactylus capensis (Smith, 1849)

Cited by 12 publications

References 31 publications

Morphology of Cutaneous Sense Organs of Gekkonid Geckos (Squamata: Gekkonidae): Structural Variation in the Most Diverse Gekkotan Family

Morphology of Cutaneous Sense Organs of Gekkonid Geckos (Squamata: Gekkonidae): Structural Variation in the Most Diverse Gekkotan Family

Tail regeneration in the gecko Sphaerodactylus argus shows that the formation of an axial elastic skeleton is functional for the new tail

The Periodic Replacement of Adhesive Setae in Pad Lamellae of Climbing Lizards Is Driven by Patterns of Corneous Layer Growth

Contact Info

Product

Resources

About