Granular cutaneous glands in the frog Physalaemus biligonigerus (Anura, Leptodactylidae): comparison between ordinary serous and ‘inguinal’ glands

Delfino, Giovanni; Brizzi, R.; Álvarez, Blanca Beatríz; Gentili, Matteo

doi:10.1054/tice.1999.0071

Cited by 29 publications

(24 citation statements)

References 22 publications

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“…In the Italian treefrog Hyla intermedia (formerly H. arbored) the serous product consists of aggregations of modular subunits, globular to tubular in shape, arranged in a remarkable periodic fashion (Delfino et al, 1994). Similar complex patterns ('heterogene Kornelung') have also been described in the European tree-frog Hyla arborea (Grosse & Linnenbach, 1989)-Furthermore, granules with repetitive substructures (or, at least, complex inner arrangements) are reported in some dart frogs belonging to the family Dendeobatidae (Neuwirth et al, 1979;Myers & Daly, 1983), as well as in the leptodactylid frog Physalaemus biligonigerus (Delfino et al, 1999a). Since cutaneous poisons in both H. intermedia and P. biligonigerus derive from similar secretory processes, the serous skin glands of these species would seem to share common secretory as well as maturational repertoires.…”

Section: Introductionsupporting

confidence: 53%

“…We have observed some granules undergoing marked condensation, which largely masks their repeating substructures, whereas others become rarefied. Results from a recent study on serous glands in P. biligonigerus (Delfino et al, 1999a) can illustrate such divergent, maturational evolution. This paludiculine frog possesses ordinary serous glands scattered over the body surface as well as specialised units (inguinal glands; Cei, 1980) in the skin covering the pelvic region.…”

Section: Discussionmentioning

confidence: 95%

“…Modular granules may release their product gradually, whereas the dense ones are involved in exocytosis as whole, secretory bodies. Following the phylogenetic scenario proposed by Daly et al (1987), and considering gland distribution, it has been suggested that gradual release is consistent with the regulative (homeostatic) role of serous products, whereas discharge of dense granules is part of the chemical defence against predators (Delfino et al, 1999a). According to the traditional classification of exocrine mechanism, release of regulative molecules is merocrine in nature, since it does not involve any cytoplasm component parts.…”

Section: Discussionmentioning

confidence: 99%

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Cutaneous serous glands in South‐American anurans: An ultrastructural comparison between hylid and pseudid species

Terreni

Nosi²,

Brizzi

et al. 2002

Italian Journal of Zoology

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An ultrastructural analysis of the secretory processes in serous cutaneous glands of some hylid species (Scinax acuminata, S. fuscovaria, S. nasica and Hyla nand) and one pseudid species (Pseudis paradoxa) revealed similar features, from the early steps to advanced maturational phases. The most consistent and peculiar trait was the occurrence of granules with repeating substructures, resulting from multi-focal condensation of the dispersed material contained in the Golgian vesicles, which represent the early feature of the secretory activity. Since the ultimate granule features derive from comparable pathways of sequential processes -including early secretory activity and maturation -the similar repetitive substructure is proposed as a trait informative on the taxonomic relationships between the species considered. Comparable granule features in serous glands of different species confirm the close systematic framing of Hyla and Scinax among Hylinae, while stressing phylogenetic relationships between the hylid and pseudid families.

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Section: Introductionsupporting

confidence: 53%

Section: Discussionmentioning

confidence: 95%

Section: Discussionmentioning

confidence: 99%

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Cutaneous serous glands in South‐American anurans: An ultrastructural comparison between hylid and pseudid species

Terreni

Nosi²,

Brizzi

et al. 2002

Italian Journal of Zoology

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“…al., 2003). Further maturational steps affecting granules of P. albonotatus lead to the repeating substructures gradually vanishing, as also observed in "ordinary" serous glands of P. biligonigeros (Delfino et al, 1999b). In the latter species, on the contrary, large serous units have been described ("inguinal glands";Cei, 1980) where serous maturation involves extreme thickening of the repetitive subunit arrangement, until extremely opaque, structureless granules are formed.…”

Section: Discussionmentioning

confidence: 83%

Ultrastructure of poison glands of South American frogs: A comparison betweenPhysalaemus albonotatus andLeptodactylus chaquensis (Anura: Leptodactylidae)

Álvarez¹,

Delfino²,

Nosi³

et al. 2004

J. Morphol.

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Serous (poison) cutaneous glands of the leptodactylid species Physalaemus albonotatus and Leptodactylus chaquensis were compared using light and transmission electron microscopy. Glands in the two species share structural traits common in anurans, including the peripheral contractile sheath (myoepithelium) and the syncytial secretory unit that produces, stores, and modifies the poison. At the ultrastructural level, early steps of poison production are also similar and fit the usual path of proteosynthesis, involving rough endoplasmic reticulum (RER) and Golgi stacks (dictyosomes) in the peripheral syncytial cytoplasm. However, several differences are obvious during the maturational processes that lead post-Golgian products to their ultimate ultrastructural traits. In P. albonotatus, the dense product released from the dictyosomes acquires a thick repeating substructure, which, however, becomes looser in the inner portion of the syncytium. In L. chaquensis, serous maturation involves gradual condensation, and opaque, somewhat "vacuolized" granules are formed. These different maturational paths expressed during poison manufacturing in the two species agree with the polyphyletic origin of the family Leptodactylidae. On the other hand, data collected for P. albonotatus fit previous findings from P. biligonigerus and stress the view that poisons produced by congeneric species share similar (or identical) ultrastructural features.

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“…Nevertheless, various subtypes of serous glands with high morphological variability have been reported (Goniakowska-Witalinska and Kubiczek 1998, Delfino et al 1999, Warburg et al 2000, Nosi et al 2002, Brunetti et al 2012, Moreno-Gómez et al 2014.…”

Section: O Albicansmentioning

confidence: 99%

Comparative analysis of the integument of different tree frog species from Ololygon and Scinax genera (Anura: Hylidae)

Silva¹,

Silva-Soares²,

Brito-Gitirana³

2017

Zoologia

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ABSTRACT. The integuments of ten treefrog species of two genera from Scinaxnae -O. angrensis (Lutz, 1973), O. flavoguttata (Lutz & Lutz, 1939), O. humilis (Lutz & Lutz, 1954), O. perpusilla (Lutz & Lutz, 1939), O. v-signata (Lutz, 1968, Scinax hayii (Barbour, 1909), S. similis (Cochran, 1952), O. trapicheroi (Lutz & Lutz, 1954) and S. x-signatus (Spix, 1824) -were investigated using conventional and histochemical techniques of light microscopy, and polarized light microscopy. All integuments showed the basic structure of the anuran integument. Moreover, the secretory portions of exocrine glands, such as serous merocrine and apocrine glands, were found to be restricted to the spongious dermis. Lipid content occurred together with the heterogeneous secretory material of the glands with an apocrine secretion mechanism. In addition, clusters of these apocrine glands were present in the ventrolateral integument of some species. Melanophores were also visualized in all examined hylids. However, the occurrence of iridophores, detected through polarized light microscopy, varied according to the species. The Eberth-Katschenko layer occurred in the dorsal integument from both genera, but it was only present in the ventral integument of O. albicans, O. angrensis, O. flavoguttata, O. perpusilla and O. v-signata. Although the integument of all treefrogs showed the same basic structure, some characteristics were genus-specific; however, these features alone may not be used to distinguish both genera.

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Granular cutaneous glands in the frog Physalaemus biligonigerus (Anura, Leptodactylidae): comparison between ordinary serous and ‘inguinal’ glands

Cited by 29 publications

References 22 publications

Cutaneous serous glands in South‐American anurans: An ultrastructural comparison between hylid and pseudid species

Cutaneous serous glands in South‐American anurans: An ultrastructural comparison between hylid and pseudid species

Ultrastructure of poison glands of South American frogs: A comparison betweenPhysalaemus albonotatus andLeptodactylus chaquensis (Anura: Leptodactylidae)

Comparative analysis of the integument of different tree frog species from Ololygon and Scinax genera (Anura: Hylidae)

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