The evolution of segmentation of centipede trunk and appendages
The segmentation of centipedes is interpreted in the light of a biphasic model of segmentation (holomeric plus meromeric).The mid!body anomaly (e. g. in the alternating short and long terga) or in the sequence of segments with and without spiracles# is regarded as due to an early patterning of the e...
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| Formato: | Articulo |
| Lenguaje: | Inglés |
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2000
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/156512 |
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I19-R120-10915-1565122023-08-18T04:07:43Z http://sedici.unlp.edu.ar/handle/10915/156512 The evolution of segmentation of centipede trunk and appendages Minelli, Alessandro Foddai, Donatella Pereira, Luis Alberto Lewis, J. G. E. 2000 2023-08-17T15:21:02Z en Ciencias Naturales Serial homology Centipedes Chilopoda Geophilomorpha Meromeric segmentation Holomeric segmentation Paramorphic axes Regeneration The segmentation of centipedes is interpreted in the light of a biphasic model of segmentation (holomeric plus meromeric).The mid!body anomaly (e. g. in the alternating short and long terga) or in the sequence of segments with and without spiracles# is regarded as due to an early patterning of the embryo, occurring before the onset of meromeric segmentation and a}ecting a level within the fourth eosegment of the trunk. Comparisons with the Diplopoda suggest that genital structures such as millipede gonopods did probably develop originally at this spot, whose position remained marked even after the transition from a putatively progoneate to the current opisthogoneate condition of centipedes, perhaps following gene duplication and divergence of expression patterns of the paralogues [A new lower limit for the number of leg!bearing segments ð16 in a male specimen of Schendylops oligopus (Pereira, Minelli & Barbieri) is established for Geophilomorpha. Coevolutionary trends involving the segmentation of the trunk, the segmentation of the appendages (especially the antennae) the postembryonic developmental schedule and the presence or absence of regeneration ability supports a recent view of the appendages as evolutionarily divergent duplicates of the main body axis. Facultad de Ciencias Naturales y Museo Articulo Articulo http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) application/pdf 103-117 |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ciencias Naturales Serial homology Centipedes Chilopoda Geophilomorpha Meromeric segmentation Holomeric segmentation Paramorphic axes Regeneration |
| spellingShingle |
Ciencias Naturales Serial homology Centipedes Chilopoda Geophilomorpha Meromeric segmentation Holomeric segmentation Paramorphic axes Regeneration Minelli, Alessandro Foddai, Donatella Pereira, Luis Alberto Lewis, J. G. E. The evolution of segmentation of centipede trunk and appendages |
| topic_facet |
Ciencias Naturales Serial homology Centipedes Chilopoda Geophilomorpha Meromeric segmentation Holomeric segmentation Paramorphic axes Regeneration |
| description |
The segmentation of centipedes is interpreted in the light of a biphasic model of segmentation (holomeric plus meromeric).The mid!body anomaly (e. g. in the alternating short and long terga) or in the sequence of segments with and without spiracles# is regarded as due to an early patterning of the embryo, occurring before the onset of meromeric segmentation and a}ecting a level within the fourth eosegment of the trunk. Comparisons with the Diplopoda suggest that genital structures such as millipede gonopods did probably develop originally at this spot, whose position remained marked even after the transition from a putatively progoneate to the current opisthogoneate condition of centipedes, perhaps following gene duplication and divergence of expression patterns of the paralogues [A new lower limit for the number of leg!bearing segments ð16 in a male specimen of Schendylops oligopus (Pereira, Minelli & Barbieri) is established for Geophilomorpha. Coevolutionary trends involving the segmentation of the trunk, the segmentation of the appendages (especially the antennae) the postembryonic developmental schedule and the presence or absence of regeneration ability supports a recent view of the appendages as evolutionarily divergent duplicates of the main body axis. |
| format |
Articulo Articulo |
| author |
Minelli, Alessandro Foddai, Donatella Pereira, Luis Alberto Lewis, J. G. E. |
| author_facet |
Minelli, Alessandro Foddai, Donatella Pereira, Luis Alberto Lewis, J. G. E. |
| author_sort |
Minelli, Alessandro |
| title |
The evolution of segmentation of centipede trunk and appendages |
| title_short |
The evolution of segmentation of centipede trunk and appendages |
| title_full |
The evolution of segmentation of centipede trunk and appendages |
| title_fullStr |
The evolution of segmentation of centipede trunk and appendages |
| title_full_unstemmed |
The evolution of segmentation of centipede trunk and appendages |
| title_sort |
evolution of segmentation of centipede trunk and appendages |
| publishDate |
2000 |
| url |
http://sedici.unlp.edu.ar/handle/10915/156512 |
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