Density and distribution of cutaneous sensilla on tails of leopard geckos (Eublepharis macularius) in relation to caudal autotomy.


:The lizard tail is well known for its ability to autotomize and regenerate. Physical contact of the tail by a predator may induce autotomy at the location at which the tail is grasped, and upon detachment the tail may undergo violent, rapid, and unpredictable movements that appear to be, to some degree, regulated by contact with the physical environment. Neither the mechanism by which tail breakage at a particular location is determined, nor that by which environmental feedback to the tail is received, are known. It has been suggested that mechanoreceptors (sensilla) are the means of mediation of such activities, and reports indicate that the density of sensilla on the tail is high. To determine the feasibility that mechanoreceptors are involved in such phenomena, we mapped scale form and the size, density, distribution, and spacing of sensilla on the head, body, limbs, and tail of the leopard gecko. This species has a full complement of autotomy planes along the length of the tail, and the postautotomic behavior of its tail has been documented. We found that the density of sensilla is highest on the tail relative to all other body regions examined; a dorsoventral gradient of caudal sensilla density is evident on the tail; sensilla are more closely spaced on the dorsal and lateral regions of the tail than elsewhere and are carried on relatively small scales; and that the whorls of scales on the tail bear a one to one relationship with the autotomy planes. Our results are consistent with the hypotheses of sensilla being involved in determining the site at which autotomy will occur, and with them being involved in the mediation of tail behavior following autotomy. These findings open the way for experimental neurological investigations of how autotomy is induced and how the detached tail responds to external environmental input.


J Morphol


Journal of morphology


Russell AP,Lai EK,Lawrence Powell G,Higham TE




Has Abstract


2014-09-01 00:00:00












  • A contribution to the morphology of visceral jaw-opening muscles of urodeles (Amphibia: Caudata).

    abstract::The morphology and probable evolution of the depressor muscles of the lower jaw, innervated by the seventh cranial nerve (VII;M. Ceratomandibularis, M. Depressor Mandibulae), in larval, neotenic, and metamorphosed Urodela were investigated. Observations on innervation and skeletal connections of the muscles were inclu...

    journal_title:Journal of morphology

    pub_type: 杂志文章


    authors: Bauer WJ

    更新日期:1997-07-01 00:00:00

  • Comprehensive schemata on the histology of the liver with consequences in terminology.

    abstract::New schemata of the liver are presented to discuss the combination of the three kinds of liver lobules known until today in a chalk-talk-manner. Terminology is also discussed. Further investigations are needed involving the construction and the vascular pattern of compound lobules of the three individial lobules of th...

    journal_title:Journal of morphology

    pub_type: 杂志文章


    authors: Preuss F,Fricke W

    更新日期:1979-11-01 00:00:00

  • Fine structure of the gnathosoma of archegozetes longisetosus [corrected] aoki (acari: oribatida, trhypochthoniidae).

    abstract::Oribatida are one of the main groups of Acari comprising mostly important decomposers in soils. Most species are particle feeders, an exceptional mode of nutrition in Arachnida. Hence, their feeding organs, the gnathosoma, are of special functional interest. We studied nearly all components using scanning and transmis...

    journal_title:Journal of morphology

    pub_type: 杂志文章


    authors: Alberti G,Heethoff M,Norton RA,Schmelzle S,Seniczak A,Seniczak S

    更新日期:2011-09-01 00:00:00

  • Kinematics and morphology: A comparison of 3D-patterns in the fifth pereiopod of swimming and non-swimming crab species (Malacostraca, Decapoda, Brachyura).

    abstract::Swimming crabs of the taxon Portunoidea show specialized, paddle-shaped fifth pereiopods (P5), which play a role in these crabs' ability to swim. In this study, the morphology of the fifth pereiopod in swimming and non-swimming crabs was studied in detail and the mobility in the articulations between podomeres was cal...

    journal_title:Journal of morphology

    pub_type: 杂志文章


    authors: Schmidt M,Hazerli D,Richter S

    更新日期:2020-12-01 00:00:00

  • Ultrastructural investigation of spermiogenesis in Peripatopsis capensis (Onychophora).

    abstract::Early spermatids of the onychophoran Peripatopsis capensis are spherical cells with a centrally located nucleus, numerous mitochondria, Golgi complexes, microtubules and two centrioles. During spermiogenesis, Golgi vesicles migrate to one side of the cell where they form a tight aggregate, which is later shed. The mat...

    journal_title:Journal of morphology

    pub_type: 杂志文章


    authors: Camatini M,Franchi E,Saita A

    更新日期:1979-01-01 00:00:00

  • Ultrastructure of the adenohypophysis in the larval anadromous sea lamprey, Petromyzon marinus L.

    abstract::The ultrastructure of the adenohypophysis (AH) in the larval anadromous sea lamprey, Petromyzon marinus L., was examined. The AH is subdivided into three regions, the pro-, meso-, and meta-AH. Cells of the nasopharyngeal stalk extend directly beneath the pro- and meso-AH to form the ventral surface of the gland. Some ...

    journal_title:Journal of morphology

    pub_type: 杂志文章


    authors: Wright GM

    更新日期:1983-06-01 00:00:00

  • Early development of the actinopterygian head. I. External development and staging of the paddlefish Polyodon spathula.

    abstract::A large sample of embryological material of the North American paddlefish Polyodon spathula (Acipenseriformes: Polyodontidae) confirms that early development in Polyodon is very similar to that reported for the sister group of Polyodontidae, the sturgeons (Acipenseridae). Polyodon illustrates many basic aspects of aci...

    journal_title:Journal of morphology

    pub_type: 杂志文章


    authors: Bemis WE,Grande L

    更新日期:1992-07-01 00:00:00

  • A fibrous membrane suspends the multifocal lens in the eyes of lampreys and African lungfishes.

    abstract::The sharpness and thus information content of the retinal image in the eye depends on the optical quality of the lens and its accurate positioning in the eye. Multifocal lenses create well-focused color images and are present in the eyes of all vertebrate groups studied to date (mammals, reptiles including birds, amph...

    journal_title:Journal of morphology

    pub_type: 杂志文章


    authors: Gustafsson OS,Ekström P,Kröger RH

    更新日期:2010-08-01 00:00:00

  • Evolutionary and comparative anatomical investigations of the autonomic cardiac nervous system in the African Cercopithecidae.

    abstract::The purpose of this study was to clarify the general architecture and morphological variations of the autonomic cardiac nervous system (ACNS) in the African Cercopithecidae (Old World monkeys), and to discuss the evolutionary changes between this system in African/Asian Cercopithecidae and humans. A detailed macroscop...

    journal_title:Journal of morphology

    pub_type: 杂志文章


    authors: Kawashima T,Akita K,Sato K,Sasaki H

    更新日期:2007-09-01 00:00:00

  • Gonadal cnidocytes in the cubozoan Tripedalia cystophora Conant, 1897 (Cnidaria: Cubozoa).

    abstract::Cubozoans have a complex lifecycle in many ways similar to the scyphozoan lifecycle. The sexual reproduction within cubozoans varies between species with one clade having copulation and internal fertilization and the release of planula larvae. This cubozoan clade, the family Tripedaliidae, includes three species, Copu...

    journal_title:Journal of morphology

    pub_type: 杂志文章


    authors: Helmark S,Garm A

    更新日期:2019-10-01 00:00:00

  • Arrangement of accessory cells and nematocytes bearing mastigophores in the tentacles of the cubozoan Chironex fleckeri.

    abstract::Nematocytes containing microbasic mastigophores are intimately associated with accessory cells in the epidermis of Chironex fleckeri. Large microbasic mastigophores may be surrounded by seven to nine such cells. Each accessory cell possesses an apical portion containing secretory droplets and a basal portion which car...

    journal_title:Journal of morphology

    pub_type: 杂志文章


    authors: Rifkin JF,Endean R

    更新日期:1988-01-01 00:00:00

  • Morphology and histology of the male reproductive system in two species of internally inseminating South American catfishes, Trachelyopterus lucenai and T. galeatus (Teleostei: Auchenipteridae).

    abstract::As part of an effort to characterize reproductive modifications in internally inseminating catfishes, ovaries and male reproductive systems were examined histologically in two species of auchenipterid catfishes, Trachelyopterus lucenai and T. galeatus, from southeastern Brazil. Internal insemination was documented in ...

    journal_title:Journal of morphology

    pub_type: 杂志文章


    authors: Downing Meisner A,Burns JR,Weitzman SH,Malabarba LR

    更新日期:2000-11-01 00:00:00

  • Histological and functional changes of oviductal endometrium during seasonal reproductive cycle of the soft-shelled turtle, Lissemys punctata punctata.

    abstract::Scanning electron and light microscopic studies reveal significant changes in the endometrial histophysiology of the soft-shelled turtle Lissemys punctata punctata during its seasonal reproductive cycle. Scanning electron microscopy shows the entire oviductal mucosa to be only slightly folded throughout the non-breedi...

    journal_title:Journal of morphology

    pub_type: 杂志文章


    authors: Sarkar S,Sarkar NK,Maiti BR

    更新日期:1995-04-01 00:00:00

  • A new type of somatosensory organ in the nasolabial skin of the dog.

    abstract::A new morphological type of somatosensory organ is described. It is found in the glabrous skin of the dog nose (rhinarium or planum nasale) and situated in dermis papillae. The otherwise thick epidermis forms a thin window above the organ. There are only a few layers of keratinocytes in the window and the corneocytes ...

    journal_title:Journal of morphology

    pub_type: 杂志文章


    authors: Elofsson R,Kröger RHH

    更新日期:2020-03-01 00:00:00

  • Detection of sugar residues in lizard tooth germs (Liolaemus gravenhorsti) using lectin histochemistry.

    abstract::The appearance, cellular distribution, and changes of sugar residues during tooth development in adults of the polyphyodont, Liolaemus gravenhorsti, were investigated by using horseradish-peroxidase-conjugate lectins (lectin-HRP). With Con A (Canavalia ensiformis), the ameloblasts (late bell stage) show granular supra...

    journal_title:Journal of morphology

    pub_type: 杂志文章


    authors: Lemus D,Cabello R,Lemus R,Soto M,Fuenzalida M

    更新日期:1994-12-01 00:00:00

  • Intra- and Intersexual swim bladder dimorphisms in the plainfin midshipman fish (Porichthys notatus): Implications of swim bladder proximity to the inner ear for sound pressure detection.

    abstract::The plainfin midshipman fish, Porichthys notatus, is a nocturnal marine teleost that uses social acoustic signals for communication during the breeding season. Nesting type I males produce multiharmonic advertisement calls by contracting their swim bladder sonic muscles to attract females for courtship and spawning wh...

    journal_title:Journal of morphology

    pub_type: 杂志文章


    authors: Mohr RA,Whitchurch EA,Anderson RD,Forlano PM,Fay RR,Ketten DR,Cox TC,Sisneros JA

    更新日期:2017-11-01 00:00:00

  • Reproductive role of attaching filaments on the egg envelope in Xenopoecilus sarasinorum (Adrianichthidae, teleostei).

    abstract::Eggs of Xenopoecilus sarasinorum possess two distinct types of filaments on the surface of the egg envelope (chorion), long, attaching filaments restricted to the vegetal pole and weak, nonattaching filaments around the animal pole (micropyle). Both types are formed during oogenesis. After mature eggs were spawned thr...

    journal_title:Journal of morphology

    pub_type: 杂志文章


    authors: Iwamatsu T,Kobayashi H,Sato M,Yamashita M

    更新日期:2008-06-01 00:00:00

  • The ultrastructure of the anal vesicle of the parasitoid, Microplitis croceipes (Hymenoptera:Braconidae).

    abstract::The fine structural characteristics of epithelial cells of the anal vesicle in the hymenopteran parasitoid, Microplitis croceipes (Cresson), are similar to those of transport cells. Apical and basal infoldings, an abundance of mitochondria, ribosomes, rough endoplasmic reticulum, Golgi complexes and pinocytotic vesicl...

    journal_title:Journal of morphology

    pub_type: 杂志文章


    authors: Edson KM,Norton WN,Vinson SB

    更新日期:1977-11-01 00:00:00

  • Morphogenesis of extraembryonic membranes and placentation in Mabuya mabouya (Squamata, Scincidae).

    abstract::Topological and histological analyses of Mabuya mabouya embryos at different developmental stages showed an extraembryonic membrane sequence as follows: a bilaminar omphalopleure and progressive mesodermal expansion around the whole yolk sac at gastrula stages; mesodermal split and formation of an exocoelom in the ent...

    journal_title:Journal of morphology

    pub_type: 杂志文章


    authors: Jerez A,Ramírez-Pinilla MP

    更新日期:2003-11-01 00:00:00

  • Basic fibroblast growth factor, neurofilament, and glial fibrillary acidic protein immunoreactivities in the myenteric plexus of the rat esophagus and colon.

    abstract::The enteric nervous system consists of a number of interconnected networks of neuronal cell bodies and fibers as well as satellite cells, the enteric glia. Basic fibroblast growth factor (bFGF) is a mitogen for a variety of mesodermal and neuroectodermal-derived cells and its presence has been described in many tissue...

    journal_title:Journal of morphology

    pub_type: 杂志文章


    authors: Chadi G,Gomide VC,Rodrigues de Souza R,Scabello RT,Maurício da Silva C

    更新日期:2004-09-01 00:00:00

  • The structure of the larval nervous system of Pisaster ochraceus (Echinodermata: Asteroidea).

    abstract::Ultrastructural observations and glyoxilic acid-induced fluorescence of catecholamines indicate that tracts of axons lie at the base of the ciliary bands and run throughout their length in bipinnaria and brachiolaria larvae of Pisaster ochraceus. Two types of nerve cells occur at regular intervals within the ciliary b...

    journal_title:Journal of morphology

    pub_type: 杂志文章


    authors: Burke RD

    更新日期:1983-10-01 00:00:00

  • Ovarian, oviductal, and placental morphology of the reproductively bimodal lizard, Sceloporus aeneus.

    abstract::Sceloporus aeneus exhibits reproductive bimodality. That is, one taxon (Sceloporus aeneus bicanthalis) is viviparous whereas the other (Sceloporus aeneus aeneus) is oviparous. Morphological differences in luteal and oviductal structure were examined. Oviparous and viviparous females have distinct corpora lutea that fo...

    journal_title:Journal of morphology

    pub_type: 杂志文章


    authors: Guillette LJ Jr,Jones RE

    更新日期:1985-04-01 00:00:00

  • Does the morphology of the ear of the Chinese bamboo rat (Rhizomys sinensis) show "Subterranean" characteristics?

    abstract::In spite of the growing interest in rodents with subterranean activity in general and the spalacids (Spalacidae) in particular, little is known about the biology of most members of this clade, such as the Chinese bamboo rat (Rhizomys sinensis). Here, we analyzed the ear morphology of R. sinensis with respect to hearin...

    journal_title:Journal of morphology

    pub_type: 杂志文章


    authors: Pleštilová L,Hrouzková E,Burda H,Šumbera R

    更新日期:2016-05-01 00:00:00

  • Viviparous development in Botrylloides (Compound Ascidians).

    abstract::The mode of sexual reproduction and embryogenesis was compared in 3 species of Botrylloides: B. simodensis, B. lenis, and B. violaceus. In all species, a testis and an egg (occasionally 2 eggs), the former being anterior to the latter, mature in the mantle on either side of a zooid. The egg is surrounded by 2 follicul...

    journal_title:Journal of morphology

    pub_type: 杂志文章


    authors: Mukai H,Saito Y,Watanabe H

    更新日期:1987-09-01 00:00:00

  • Interspecific variation of ontogeny and skull shape among porpoises (Phocoenidae).

    abstract::All extant members of Phocoenidae (porpoises) have been characterized as pedomorphic based on skeletal characters. To investigate the ontogenetic background for pedomorphosis and assess interspecific differences in ontogeny among phocoenids, samples of the six extant species were compared in terms of development of bo...

    journal_title:Journal of morphology

    pub_type: 杂志文章


    authors: Galatius A,Berta A,Frandsen MS,Goodall RN

    更新日期:2011-02-01 00:00:00

  • Nervous system development in the fairy shrimp Branchinella sp. (Crustacea: Branchiopoda: Anostraca): Insights into the development and evolution of the branchiopod brain and its sensory organs.

    abstract::Using immunohistochemical labeling against acetylated a-tubulin and serotonin in combination with confocal laser scanning microscopy and 3D-reconstruction, we investigated the temporary freshwater pond inhabitant Branchinella sp. (Crustacea: Branchiopoda: Anostraca) for the first time to provide detailed data on the d...

    journal_title:Journal of morphology

    pub_type: 杂志文章


    authors: Frase T,Richter S

    更新日期:2016-11-01 00:00:00

  • Postnatal ontogeny of limb proportions and functional indices in the subterranean rodent Ctenomys talarum (Rodentia: Ctenomyidae).

    abstract::Burrow construction in the subterranean Ctenomys talarum (Rodentia: Ctenomyidae) primarily occurs by scratch-digging. In this study, we compared the limbs of an ontogenetic series of C. talarum to identify variation in bony elements related to fossorial habits using a morphometrical and biomechanical approach. Diamete...

    journal_title:Journal of morphology

    pub_type: 杂志文章


    authors: Echeverría AI,Becerra F,Vassallo AI

    更新日期:2014-08-01 00:00:00

  • A scanning electron microscopic study of differentiation of the digital pad in regenerating digits of the kenyan reed frog, Hyperolius viridiflavus ferniquei.

    abstract::Newly metamorphosed Kenyan reed frogs, Hyperolius viridiflavus ferniquei, are able to regenerate amputated digits. The terminal digital pad is also completely reformed. Differentiation of the regenerating digital pad was studied by scanning electron microscopy. External differentiation of the digital pad began late in...

    journal_title:Journal of morphology

    pub_type: 杂志文章


    authors: Richards CM,Carlson BM,Connelly TG,Rogers SL,Ashcraft E

    更新日期:1977-09-01 00:00:00

  • On the allometry of long bones in dogs (Canis familiaris).

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    journal_title:Journal of morphology

    pub_type: 杂志文章


    authors: Casinos A,Bou J,Castiella MJ,Viladiu C

    更新日期:1986-10-01 00:00:00

  • The feeding system of terrestrial tiger salamanders (Ambystoma tigrinum melanostictum baird).

    abstract::High speed cinematography was used to record the feeding activities of terrestrial Ambystoma tigrinum melanostictum. A description of these activities based on films of more than 50 feeding sequences is presented, and the mechanical units involved are defined, described, and functionally analyzed. Evolutionary implica...

    journal_title:Journal of morphology

    pub_type: 杂志文章


    authors: Larsen JH Jr,Guthrie DJ

    更新日期:1975-10-01 00:00:00