Cargando…

Additional moults into ‘elongatus’ males in laboratory-reared Polydesmus angustus Latzel, 1884 (Diplopoda, Polydesmida, Polydesmidae) – implications for taxonomy

Abstract. The number of stadia during post-embryonic development is supposed to be fixed in most species of the millipede order Polydesmida. For the first time since 1928, additional moults were observed in two males of Polydesmus angustus Latzel, 1884 reared in the laboratory. These ‘elongatus’ mal...

Descripción completa

Detalles Bibliográficos
Autores principales: David, Jean-Francois, Geoffroy, Jean-Jacques
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Pensoft Publishers 2011
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3253569/
https://www.ncbi.nlm.nih.gov/pubmed/22303094
http://dx.doi.org/10.3897/zookeys.156.2045
_version_ 1782220746644258816
author David, Jean-Francois
Geoffroy, Jean-Jacques
author_facet David, Jean-Francois
Geoffroy, Jean-Jacques
author_sort David, Jean-Francois
collection PubMed
description Abstract. The number of stadia during post-embryonic development is supposed to be fixed in most species of the millipede order Polydesmida. For the first time since 1928, additional moults were observed in two males of Polydesmus angustus Latzel, 1884 reared in the laboratory. These ‘elongatus’ males sensu Verhoeff reached stadium IX instead of stadium VIII, with addition of a further podous ring (32 pairs of legs). One male had well-developed gonopods at stadium VIII, which regressed at stadium IX; the other had no gonopods at stadium VIII, which developed at stadium IX. The two cases correspond to the ‘regressionis’ and ‘progressionis’ forms described by Verhoeff in Polydesmus complanatus (Linnaeus, 1761), which confirms entirely his results. Additional moults appear to be associated with small body sizes and possible underlying mechanisms are discussed. Comparisons between millipede orders indicate that post-embryonic development is less strictly canalized in Polydesmida than in Chordeumatida. This implies that the adult number of body rings is of limited taxonomic value in Polydesmida and should not be viewed as a character of generic importance.
format Online
Article
Text
id pubmed-3253569
institution National Center for Biotechnology Information
language English
publishDate 2011
publisher Pensoft Publishers
record_format MEDLINE/PubMed
spelling pubmed-32535692012-02-02 Additional moults into ‘elongatus’ males in laboratory-reared Polydesmus angustus Latzel, 1884 (Diplopoda, Polydesmida, Polydesmidae) – implications for taxonomy David, Jean-Francois Geoffroy, Jean-Jacques Zookeys Article Abstract. The number of stadia during post-embryonic development is supposed to be fixed in most species of the millipede order Polydesmida. For the first time since 1928, additional moults were observed in two males of Polydesmus angustus Latzel, 1884 reared in the laboratory. These ‘elongatus’ males sensu Verhoeff reached stadium IX instead of stadium VIII, with addition of a further podous ring (32 pairs of legs). One male had well-developed gonopods at stadium VIII, which regressed at stadium IX; the other had no gonopods at stadium VIII, which developed at stadium IX. The two cases correspond to the ‘regressionis’ and ‘progressionis’ forms described by Verhoeff in Polydesmus complanatus (Linnaeus, 1761), which confirms entirely his results. Additional moults appear to be associated with small body sizes and possible underlying mechanisms are discussed. Comparisons between millipede orders indicate that post-embryonic development is less strictly canalized in Polydesmida than in Chordeumatida. This implies that the adult number of body rings is of limited taxonomic value in Polydesmida and should not be viewed as a character of generic importance. Pensoft Publishers 2011-12-20 /pmc/articles/PMC3253569/ /pubmed/22303094 http://dx.doi.org/10.3897/zookeys.156.2045 Text en Jean-Francois David, Jean-Jacques Geoffroy http://creativecommons.org/licenses/by/3.0 This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Article
David, Jean-Francois
Geoffroy, Jean-Jacques
Additional moults into ‘elongatus’ males in laboratory-reared Polydesmus angustus Latzel, 1884 (Diplopoda, Polydesmida, Polydesmidae) – implications for taxonomy
title Additional moults into ‘elongatus’ males in laboratory-reared Polydesmus angustus Latzel, 1884 (Diplopoda, Polydesmida, Polydesmidae) – implications for taxonomy
title_full Additional moults into ‘elongatus’ males in laboratory-reared Polydesmus angustus Latzel, 1884 (Diplopoda, Polydesmida, Polydesmidae) – implications for taxonomy
title_fullStr Additional moults into ‘elongatus’ males in laboratory-reared Polydesmus angustus Latzel, 1884 (Diplopoda, Polydesmida, Polydesmidae) – implications for taxonomy
title_full_unstemmed Additional moults into ‘elongatus’ males in laboratory-reared Polydesmus angustus Latzel, 1884 (Diplopoda, Polydesmida, Polydesmidae) – implications for taxonomy
title_short Additional moults into ‘elongatus’ males in laboratory-reared Polydesmus angustus Latzel, 1884 (Diplopoda, Polydesmida, Polydesmidae) – implications for taxonomy
title_sort additional moults into ‘elongatus’ males in laboratory-reared polydesmus angustus latzel, 1884 (diplopoda, polydesmida, polydesmidae) – implications for taxonomy
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3253569/
https://www.ncbi.nlm.nih.gov/pubmed/22303094
http://dx.doi.org/10.3897/zookeys.156.2045
work_keys_str_mv AT davidjeanfrancois additionalmoultsintoelongatusmalesinlaboratoryrearedpolydesmusangustuslatzel1884diplopodapolydesmidapolydesmidaeimplicationsfortaxonomy
AT geoffroyjeanjacques additionalmoultsintoelongatusmalesinlaboratoryrearedpolydesmusangustuslatzel1884diplopodapolydesmidapolydesmidaeimplicationsfortaxonomy