Two undescribed species of Procambarus crayfish (Crustacea, Decapoda) inhabit the subterranean stream running in the recently explored Cueva de Los Camarones, Chiapas, Mexico. Individuals ranging from dark, robust, large-eyed forms with an epigean mien to pale, comparatively slender, microphthalmic ones resembling related troglobites were found, but only the extremes could be distinguished visually. Evolutionary relationships among individuals were investigated morphometrically by means of multivariate analysis on 14 body dimensions. These analyses revealed a significant discontinuity between the two species, mainly determined by the shape of the rostrum, chelae and telson. The occurrence of a few aberrant phenotypes may indicate the existence of some gene flow between the two species. Microgeographic variation was demonstrated within the less cavernicolous species. The characters involved were the same as those that discriminate between the two species. These results are compared with allozymic data presented in a parallel paper and the role of genic introgression and environmental induction are discussed. © 1992.

Allegrucci, G., Baldari, F., Cesaroni, D., Thorpe, R., Sbordoni, V. (1992). Morphometric analysis of interspecific and microgeographic variation of crayfish from a Mexican cave. BIOLOGICAL JOURNAL OF THE LINNEAN SOCIETY, 47(4), 455-468 [10.1111/j.1095-8312.1992.tb00679.x].

Morphometric analysis of interspecific and microgeographic variation of crayfish from a Mexican cave

ALLEGRUCCI, GIULIANA;CESARONI, DONATELLA;SBORDONI, VALERIO
1992-01-01

Abstract

Two undescribed species of Procambarus crayfish (Crustacea, Decapoda) inhabit the subterranean stream running in the recently explored Cueva de Los Camarones, Chiapas, Mexico. Individuals ranging from dark, robust, large-eyed forms with an epigean mien to pale, comparatively slender, microphthalmic ones resembling related troglobites were found, but only the extremes could be distinguished visually. Evolutionary relationships among individuals were investigated morphometrically by means of multivariate analysis on 14 body dimensions. These analyses revealed a significant discontinuity between the two species, mainly determined by the shape of the rostrum, chelae and telson. The occurrence of a few aberrant phenotypes may indicate the existence of some gene flow between the two species. Microgeographic variation was demonstrated within the less cavernicolous species. The characters involved were the same as those that discriminate between the two species. These results are compared with allozymic data presented in a parallel paper and the role of genic introgression and environmental induction are discussed. © 1992.
1992
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore BIO/05 - ZOOLOGIA
English
Con Impact Factor ISI
cave population; microgeographic variation; multivariate morphometry; Procambarus; Speciation
Allegrucci, G., Baldari, F., Cesaroni, D., Thorpe, R., Sbordoni, V. (1992). Morphometric analysis of interspecific and microgeographic variation of crayfish from a Mexican cave. BIOLOGICAL JOURNAL OF THE LINNEAN SOCIETY, 47(4), 455-468 [10.1111/j.1095-8312.1992.tb00679.x].
Allegrucci, G; Baldari, F; Cesaroni, D; Thorpe, R; Sbordoni, V
Articolo su rivista
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/23415
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