Abstract (en):
In this study, morphological variations are established at the level of the carapace, pereopods, exognath of the third maxilliped and gonopod of 333 specimens of freshwater crabs of the species Neostrengeria charalensis from exo and endocarstic environments. The relationship of the length of the exognath to the ischium of the endognath of the third maxilliped presents an average of 0.55 for specimens of epigeal origin and 0.59 for hypogeal specimens. It was established that there are differences between the proportions of the total length of the second pereopod versus the width of the carapace, being greater this proportion in the specimens of hypogean habits in comparison to those with epigean habits. At the gonopod level, differences in cave specimens were described and illustrated. Relevant differences were found in morphological proportions, but these do not represent large variations. The importance of this study is that it allows us to conclude that there is an adaptive response by the specimens of hypogeous habitsto their environment. Additionally, some aspects about the distribution, habitat and bioecology of this species in hypogeous environments are included.
Abstract (es):
En este estudio se identifican las variaciones morfológicas a nivel del caparazón, pereópodos, exognatos
del tercer maxilípedo y gonópodos de 333 especímenes de Neostrengeria charalensis provenientes de
ambientes exo y endocársticos. La relación de la longitud del exognato respecto al isquio del endognato
del tercer maxilípedo presenta un promedio de 0,55 para los especímenes de origen epigeo y 0,59 para
los de origen hipogeo. Se estableció que existen diferencias entre la proporción de la longitud total del
segundo pereópodo versus el ancho del caparazón, siendo mayor esta proporción en los especímenes
de hábitos hipogeos frente a los epigeos. A nivel del gonópodo se describen y se ilustran las diferencias
de especímenes provenientes de cuevas y cavernas. Se establecieron diferencias importantes en las
proporciones a nivel morfológico, aunque estas no correspondieron a grandes variaciones. El resultado
más relevante de este estudio es la evidencia de la existencia de una respuesta adaptativa por parte de
los especímenes de hábitos hipogeos a su ambiente. Adicionalmente se incluyen algunos aspectos sobre
la distribución, hábitat y bioecología de esta especie en ambientes hipogeos.
Keywords:
Especie troglófila, Endemismo, Hypolobocerini, Neotrópico (es)
Endemism, Hypolobocerini, Neotropical Region, Troglophyl species (en)
Endemism, Hypolobocerini, Neotropical Region, Troglophyl species (en)
References
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How to Cite
Campos, M. R., Acevedo, A., Lasso, C. A., & Fernández-Auderset, J. (2018). Morphological variations and some bioecological notes of the freshwater crab Neostrengeria charalensis Campos & Rodríguez, 1985 (Decapoda: Pseudothelphusidae), in exo and endocarstic environments of the Colombian Andes. Biota Colombiana, 19(Sup. 1), 65–83. https://doi.org/10.21068/c2018.v19s1a07
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