scholarly journals Comparative description and ossification patterns ofDendropsophus labialis(Peters, 1863) andScinax ruber(Laurenti, 1758) (Anura: Hylidae)

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e4525 ◽  
Author(s):  
Angélica Arenas-Rodríguez ◽  
Juan Francisco Rubiano Vargas ◽  
Julio Mario Hoyos
Keyword(s):  
Comparative Studies ◽  
Vertebral Column ◽  
Skeletal Development ◽  
Life Cycles ◽  
Differential Staining ◽  
Large Group ◽  
Staining Techniques ◽  
Ossification Sequences ◽  
Comparative Description ◽  
Ossification Sequence

Although comparative studies of anuran ontogeny have provided new data on heterochrony in the life cycles of frogs, most of them have not included ossification sequences. Using differential staining techniques, we observe and describe differences and similarities of cranial and postcranial development in two hylid species,Scinax ruber(Scinaxinae) andDendropsophus labialis(Hylinae), providing new data of ontogenetic studies in these Colombian species. We examined tadpoles raining from Gosner Stages 25 to 45. We found differences between species in the infrarostral and suprarostral cartilages, optic foramen, planum ethmoidale, and gill apparatus. In both species, the first elements to ossify were the atlas and transverse processes of the vertebral column and the parasphenoid. Both species exhibited suprascapular processes as described in other hylids. Although the hylids comprise a large group (over 700 species), postcranial ossification sequence is only known for 15 species. Therefore, the descriptions of the skeletal development and ossification sequences provided herein will be useful for future analyses of heterochrony in the group.

scholarly journals Comparative description and ossification patterns of Dendropsophus labialis (Peters, 1863) and Scinax ruber (Laurenti, 1758)(Anura: Hylidae)

2017 ◽  
Author(s):  
Angélica Arenas Rodríguez ◽  
Juan Francisco Rubiano ◽  
Julio Mario Hoyos
Keyword(s):  
Comparative Studies ◽  
Skeletal Development ◽  
Spinal Column ◽  
Transverse Process ◽  
Life Cycles ◽  
Larval Stages ◽  
Staining Techniques ◽  
Ossification Sequences ◽  
Comparative Description ◽  
Ossification Sequence

Although comparative studies of anuran ontogeny have provided new data on heterochrony in the life cycles of frogs, most of them have not included Colombian species. Using different staining techniques, we describe the cranial and poscranial elements development in two hylid species, Scinax ruber and Dendropsophus labialis, providing new data for more comprehensive ontogenetic studies in Neotropical frogs. We examined specimens from Gosner stages 25 to 45. We found differences in the infrarostral and suprarostral cartilages, optic foramen, planum ethmoidale, and the gill apparatus. In the ossification sequence, one of the first elements to ossify were the transverse process of spinal column and atlas in both species, and the parasphenoid in the skull. New descriptions of skeletal development and ossification sequences of larval stages of these two species, especially data concerning the postcranium, contribute with useful information for analysis of sequential heterochrony, because although the hylids are widely known, there are few works (15 of 700 species) about ossification sequence that include the whole skeleton.

scholarly journals Comparative description and ossification patterns of Dendropsophus labialis (Peters, 1863) and Scinax ruber (Laurenti, 1758)(Anura: Hylidae)

2017 ◽  
Author(s):  
Angélica Arenas Rodríguez ◽  
Juan Francisco Rubiano ◽  
Julio Mario Hoyos
Keyword(s):  
Comparative Studies ◽  
Skeletal Development ◽  
Spinal Column ◽  
Transverse Process ◽  
Life Cycles ◽  
Larval Stages ◽  
Staining Techniques ◽  
Ossification Sequences ◽  
Comparative Description ◽  
Ossification Sequence

Although comparative studies of anuran ontogeny have provided new data on heterochrony in the life cycles of frogs, most of them have not included Colombian species. Using different staining techniques, we describe the cranial and poscranial elements development in two hylid species, Scinax ruber and Dendropsophus labialis, providing new data for more comprehensive ontogenetic studies in Neotropical frogs. We examined specimens from Gosner stages 25 to 45. We found differences in the infrarostral and suprarostral cartilages, optic foramen, planum ethmoidale, and the gill apparatus. In the ossification sequence, one of the first elements to ossify were the transverse process of spinal column and atlas in both species, and the parasphenoid in the skull. New descriptions of skeletal development and ossification sequences of larval stages of these two species, especially data concerning the postcranium, contribute with useful information for analysis of sequential heterochrony, because although the hylids are widely known, there are few works (15 of 700 species) about ossification sequence that include the whole skeleton.

scholarly journals Amphibian Hormones, Calcium Physiology, Bone Weight, and Lung Use Call for a More Inclusive Approach to Understanding Ossification Sequence Evolution

2021 ◽  
Vol 9 ◽  
Author(s):  
Christopher S. Rose
Keyword(s):  
Life Histories ◽  
Skeletal Development ◽  
Sequence Evolution ◽  
Larval Habitats ◽  
Inclusive Approach ◽  
Embryonic Origin ◽  
Ossification Sequences ◽  
Ossification Process ◽  
And Behavior ◽  
Ossification Sequence

Skeleton plays a huge role in understanding how vertebrate animals have diversified in phylogeny, ecology and behavior. Recent evo-devo research has used ossification sequences to compare skeletal development among major groups, to identify conserved and labile aspects of a sequence within a group, to derive ancestral and modal sequences, and to look for modularity based on embryonic origin and type of bone. However, questions remain about how to detect and order bone appearances, the adaptive significance of ossification sequences and their relationship to adult function, and the utility of categorizing bones by embryonic origin and type. Also, the singular focus on bone appearances and the omission of other tissues and behavioral, ecological and life history events limit the relevance of such analyses. Amphibians accentuate these concerns because of their highly specialized biphasic life histories and the exceptionally late timing, and high variability of their ossification sequences. Amphibians demonstrate a need for a whole-animal, whole-ontogeny approach that integrates the entire ossification process with physiology, behavior and ecology. I discuss evidence and hypotheses for how hormone mediation and calcium physiology might elicit non-adaptive variability in ossification sequence, and for adaptive strategies to partition larval habitats using bone to offset the buoyancy created by lung use. I also argue that understanding plasticity in ossification requires shifting focus away from embryonic development and adult function, and toward postembryonic mechanisms of regulating skeletal growth, especially ones that respond directly to midlife environments and behaviors.

scholarly journals Cytogenetical analyses in three fish species of the genus Pimelodus(Siluriformes: Pimelodidae) from rio São Francisco: considerations about the karyotypical evolution in the genus

2005 ◽  
Vol 3 (2) ◽  
pp. 285-290 ◽  
Author(s):  
Caroline Garcia ◽  
Orlando Moreira Filho
Keyword(s):  
Chromosome Pair ◽  
Chromosomal Rearrangements ◽  
Nucleolar Organizer ◽  
Differential Staining ◽  
Nucleolar Organizer Regions ◽  
C Banding ◽  
Heteromorphic Sex Chromosomes ◽  
Chromosomal Markers ◽  
Staining Techniques ◽  
Species Specific

Karyotypes and other chromosomal markers were investigated in three species of the catfish genus Pimelodus, namely P. fur, P. maculatus and Pimelodus sp., from municipality of Três Marias, Minas Gerais, Brazil, using differential staining techniques (C-banding, Silver nitrate and CMA3 staining). The diploid chromosome number was 2n = 56 in P. maculatus and Pimelodus sp., while in P. fur 2n = 54. The karyotype of P. fur consisted in 32M + 8SM + 6ST + 8A with fundamental number (NF) of 100, that of P. maculatus 32M + 12SM + 12A with NF = 112, and that of Pimelodus sp. had 32M + 12Sm + 6ST + 6A with NF = 106.The nucleolar organizer regions (NORs) in all three species were invariably detected in telomeres of longer arm of the 20th chromosome pair. These sites were also positive after CMA3 and C-banding. No heteromorphic sex chromosomes were detected and C-banding pattern was species specific. Inferences about the karyotype differentiation in Pimelodus and putative chromosomal rearrangements are hypohesized.

Chondrification and osteological development of vertebral column in tadpoles of Microhyla ornata

1989 ◽  
Vol 10 (3) ◽  
pp. 321-329
Author(s):  
D. Dey ◽  
S.K. Dutta ◽  
P. Mohanty-Hejmadi
Keyword(s):  
Vertebral Column ◽  
Axial Skeleton ◽  
Differential Staining ◽  
Stages Of Development ◽  
Early Stages ◽  
Osteological Development

AbstractChondrification and osteological development of vertebral column in the ornate frog, Microhyla ornata tadpoles has been studied by differential staining. At early stages of development the bones of vertebral column develop as cartilaginous structures. At different stages after chondrification, ossification starts in different components of the axial skeleton. The vertebral column ossifies between Taylor-Kollros stages XV and XXV. Chondrification as well as ossification occur proximodistally.

scholarly journals THE OSSIFICATION SEQUENCES OF THE VERTEBRAL COLUMN IN THE CARP AND THE SNAKE-HEAD FISH

1963 ◽  
Vol 29 (7) ◽  
pp. 667-674 ◽  
Author(s):  
Yasuo ITAZAWA
Keyword(s):  
Vertebral Column ◽  
Ossification Sequences
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