Increase by duplication and loss of invariance of segment number in the centipedeMecistocephalus microporus(Chilopoda, Geophilomorpha, Mecistocephalidae)

Autor:	Lucio Bonato, Alessandro Minelli, Donatella Foddai
Rok vydání:	2001
Předmět:	biology Evolutionary biology Animal Science and Zoology Taxonomy (biology) Mecistocephalidae Anatomy biology.organism_classification Clade Centipede Microporus Mecistocephalus
Zdroj:	Italian Journal of Zoology. 68:345-352
ISSN:	1748-5851 1125-0003
DOI:	10.1080/11250000109356429
Popis:	Intraspecific variability in the number of trunk segments is demonstrated for the first time in a representative of the Mecistocephalidae, a basal clade within the geophilomorph centipedes. This destabilization of an otherwise species‐constant segment number is interpreted as a result of the recent quasi‐duplication of segments shown by Mecistocephalus microporus Haase, 1887, with respect to its most recent ancestor. The new finding fits well with a recently proposed biphasic model of centipede segmentation. The species is redescribed and two new synonymies are proposed: Megethmus Cook, 1895 as junior synonym of Mecistocephalus Newport, 1843 and Megethmus pluripes Chamberlin, 1920 as a junior synonym of Mecistocephalus microporus Haase, 1887.
Databáze:	OpenAIRE
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