Skin gland concentrations adapted to different evolutionary pressures in the head and posterior regions of the caecilian Siphonops annulatus

Abstract Amphibian skin is rich in mucous glands and poison glands, secreting substances important for gas exchange and playing a fundamental role in chemical defense against predators and microorganisms. In the caecilian Siphonops annulatus (Mikan, 1920) we observed a concentration of enlarged muco...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Carlos Jared, Pedro Luiz Mailho-Fontana, Rafael Marques-Porto, Juliana Mozer Sciani, Daniel Carvalho Pimenta, Edmund D. Brodie, Marta Maria Antoniazzi
Formato: article
Lenguaje:EN
Publicado: Nature Portfolio 2018
Materias:
R
Q
Acceso en línea:https://doaj.org/article/def53cb531c742b188a2f9543487e1fd
Etiquetas: Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
id oai:doaj.org-article:def53cb531c742b188a2f9543487e1fd
record_format dspace
spelling oai:doaj.org-article:def53cb531c742b188a2f9543487e1fd2021-12-02T11:40:16ZSkin gland concentrations adapted to different evolutionary pressures in the head and posterior regions of the caecilian Siphonops annulatus10.1038/s41598-018-22005-52045-2322https://doaj.org/article/def53cb531c742b188a2f9543487e1fd2018-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-22005-5https://doaj.org/toc/2045-2322Abstract Amphibian skin is rich in mucous glands and poison glands, secreting substances important for gas exchange and playing a fundamental role in chemical defense against predators and microorganisms. In the caecilian Siphonops annulatus (Mikan, 1920) we observed a concentration of enlarged mucous glands in the head region. In the posterior region of the body a similar concentration is made up of enlarged poison glands. These accumulations of glands structurally resemble the macroglands previously reported in anurans and salamanders. The skin glands in these regions are each surrounded by collagen walls forming a honeycomb-like structure. The collagen network in the head region firmly attaches to tiny pits in the bones of the skull. The two extremities of the body produce different secretions, containing exclusive molecules. Considering the fossorial lifestyle of caecilians, it seems evident that the secretions of the head and caudal region serve different functions. The anterior macrogland of mucous glands, rich in mucous/lipid secretion, in conjunction with the funnel-shaped head, may act to lubricate the body and penetrate the soil, thus facilitating locomotion underground. The blunt posterior end bearing an internalized macrogland of poison glands in the dermis may act in chemical defense and/or by blocking invasion of tunnels.Carlos JaredPedro Luiz Mailho-FontanaRafael Marques-PortoJuliana Mozer ScianiDaniel Carvalho PimentaEdmund D. BrodieMarta Maria AntoniazziNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-7 (2018)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Carlos Jared
Pedro Luiz Mailho-Fontana
Rafael Marques-Porto
Juliana Mozer Sciani
Daniel Carvalho Pimenta
Edmund D. Brodie
Marta Maria Antoniazzi
Skin gland concentrations adapted to different evolutionary pressures in the head and posterior regions of the caecilian Siphonops annulatus
description Abstract Amphibian skin is rich in mucous glands and poison glands, secreting substances important for gas exchange and playing a fundamental role in chemical defense against predators and microorganisms. In the caecilian Siphonops annulatus (Mikan, 1920) we observed a concentration of enlarged mucous glands in the head region. In the posterior region of the body a similar concentration is made up of enlarged poison glands. These accumulations of glands structurally resemble the macroglands previously reported in anurans and salamanders. The skin glands in these regions are each surrounded by collagen walls forming a honeycomb-like structure. The collagen network in the head region firmly attaches to tiny pits in the bones of the skull. The two extremities of the body produce different secretions, containing exclusive molecules. Considering the fossorial lifestyle of caecilians, it seems evident that the secretions of the head and caudal region serve different functions. The anterior macrogland of mucous glands, rich in mucous/lipid secretion, in conjunction with the funnel-shaped head, may act to lubricate the body and penetrate the soil, thus facilitating locomotion underground. The blunt posterior end bearing an internalized macrogland of poison glands in the dermis may act in chemical defense and/or by blocking invasion of tunnels.
format article
author Carlos Jared
Pedro Luiz Mailho-Fontana
Rafael Marques-Porto
Juliana Mozer Sciani
Daniel Carvalho Pimenta
Edmund D. Brodie
Marta Maria Antoniazzi
author_facet Carlos Jared
Pedro Luiz Mailho-Fontana
Rafael Marques-Porto
Juliana Mozer Sciani
Daniel Carvalho Pimenta
Edmund D. Brodie
Marta Maria Antoniazzi
author_sort Carlos Jared
title Skin gland concentrations adapted to different evolutionary pressures in the head and posterior regions of the caecilian Siphonops annulatus
title_short Skin gland concentrations adapted to different evolutionary pressures in the head and posterior regions of the caecilian Siphonops annulatus
title_full Skin gland concentrations adapted to different evolutionary pressures in the head and posterior regions of the caecilian Siphonops annulatus
title_fullStr Skin gland concentrations adapted to different evolutionary pressures in the head and posterior regions of the caecilian Siphonops annulatus
title_full_unstemmed Skin gland concentrations adapted to different evolutionary pressures in the head and posterior regions of the caecilian Siphonops annulatus
title_sort skin gland concentrations adapted to different evolutionary pressures in the head and posterior regions of the caecilian siphonops annulatus
publisher Nature Portfolio
publishDate 2018
url https://doaj.org/article/def53cb531c742b188a2f9543487e1fd
work_keys_str_mv AT carlosjared skinglandconcentrationsadaptedtodifferentevolutionarypressuresintheheadandposteriorregionsofthecaeciliansiphonopsannulatus
AT pedroluizmailhofontana skinglandconcentrationsadaptedtodifferentevolutionarypressuresintheheadandposteriorregionsofthecaeciliansiphonopsannulatus
AT rafaelmarquesporto skinglandconcentrationsadaptedtodifferentevolutionarypressuresintheheadandposteriorregionsofthecaeciliansiphonopsannulatus
AT julianamozersciani skinglandconcentrationsadaptedtodifferentevolutionarypressuresintheheadandposteriorregionsofthecaeciliansiphonopsannulatus
AT danielcarvalhopimenta skinglandconcentrationsadaptedtodifferentevolutionarypressuresintheheadandposteriorregionsofthecaeciliansiphonopsannulatus
AT edmunddbrodie skinglandconcentrationsadaptedtodifferentevolutionarypressuresintheheadandposteriorregionsofthecaeciliansiphonopsannulatus
AT martamariaantoniazzi skinglandconcentrationsadaptedtodifferentevolutionarypressuresintheheadandposteriorregionsofthecaeciliansiphonopsannulatus
_version_ 1718395675825143808