Anatomy and shell shape variability in a land snail Bostryx torallyi (Stylommatophora: Bulimulidae)

Authors

  • María José Miranda UNT Author

DOI:

https://doi.org/10.15517/rbt.v68i1.37424

Keywords:

altitude, intraspecific variability, geometric morphometric, relative warp, Argentina, Bolivia

Abstract

Introduction: The gastropod Bostryx torallyi shows high variability in shell shape and coloration. Subspecies of this organism have been described based on shell characters but, since they were slightly different, they were synonymized afterwards. Until now, shell variability has been analyzed only descriptively and its anatomy is still unknown. Objective: In this study, I provide anatomical information of B. torallyi and apply a geometric morphometric analysis to evaluate the shell shape variation among specimens. Methods: To accomplish this, type material and numerous lots were examined and dissected out. Additionally, relative warp analysis, based on 9 landmarks in ventral view of the shell, was performed using 80 specimens of 9 localities from Bolivia and Argentina. Results: According to our results, geometric morphometrics is a suitable method to evaluate differences in shell shape among localities; for instance, distinctions in the shell were noticeable between gastropods of low and high altitudes. On the other hand, it was established that the coloration of this species is independent of large-scale factors since the examined specimens came from environments with similar conditions. Furthermore, the sculpture of the protoconch and anatomy of B. torallyi coincided with the other Argentinian species of the genus. Conclusions: Therefore, I concluded that a geometric morphometric analysis of shell shape is a good complement to traditional qualitative description of the characteristics of the shell in this species.

Downloads

Download data is not yet available.

Author Biography

  • María José Miranda, UNT

    Facultad de Ciencias Naturales e IML

References

Backeljau, T., Baur, A., & Baur, B. (2001). Population and Conservation Genetics. In G. M. Barker (Ed.), The biology of terrestrial Molluscs (pp. 383-412). Wallingford, United Kingdom: CABI Publishing. DOI: https://doi.org/10.1079/9780851993188.0383

Cameron, R. A. D., & Pokryszko, B. M. (2008). Variation in Cepaea populations over 42 years: climate fluctuations destroy a topographical relationship of morph-frequencies. Biological Journal of the Linnean Society, 95, 53-61. DOI: https://doi.org/10.1111/j.1095-8312.2008.01042.x

Carvajal-Rodríguez, A., Conde-Padin, P., & Rolan-Álvarez, E. (2005). Decomposing shell form into size and shape by geometric morphometric methods in two sympatric ecotypes of Littorina saxatilis. Journal of Molluscan Studies, 71, 313-318. DOI: https://doi.org/10.1093/mollus/eyi037

Chiba, S. (2004). Ecological and morphological patterns in communities of land snails of the genus Mandarina from the Bonin Islands. Journal of Evolution Biology, 17, 131-143. DOI: https://doi.org/10.1046/j.1420-9101.2004.00639.x

Cuezzo, M. G., Miranda, M. J., & Ovando, X. M. C. (2013). Species catalogue of Orthalicoidea in Argentina (Gastropoda: Stylommatophora). Malacologia, 56, 135-191. DOI: https://doi.org/10.4002/040.056.0210

Dillon, R. T., & Jacquemin, S. J. (2015). The Heritability of Shell Morphometrics in the Freshwater Pulmonate Gastropod Physa. PLoS ONE, 10(4), e0121962. DOI: https://doi.org/10.1371/journal.pone.0121962 DOI: https://doi.org/10.1371/journal.pone.0121962

Di Rienzo, J. A., Casanoves, F., Balzarini, M. G., González, L., Tablada, M., & Robledo, C. W. (2016). InfoStat (Version 2016). Retrieved from https://www.infostat.com.ar/

Haase, M., Esch, S., & Misof, B. (2013). Local adaptation, refugial isolation and secondary contact of alpine populations of the land snail Arianta arbustorum. Journal of Molluscan Studies, 79, 241-248. DOI: https://doi.org/10.1093/mollus/eyt017

Hylton-Scott, M. I. (1948). Moluscos del biotopo del Cerro Colorado (Salta). Acta Zoológica Lilloana, 6, 229-239.

Márquez, F., & van der Molen, S. (2011). Intraspecific shell‐shape variation in the razor clam Ensis macha along the Patagonian coast. Journal of Molluscan Studies, 77(2), 123-128. DOI: https://doi.org/10.1093/mollus/eyq044

Miquel, S. E. (1995). Las especies del género Bostryx Troschel, 1847 en la República Argentina (2da. y última parte) (Gastropoda: Stylommatophora: Bulimulidae). Archiv für Molluskenkunde, 124, 119-127. DOI: https://doi.org/10.1127/arch.moll/124/1995/119

Miranda, M. J. (2016). Cladistic analysis of the Argentinian species of the genus Bostryx (Gastropoda, Stylommatophora) based on morphological evidence. Papeis Avulsos de Zoologia, 56(10), 109-133. DOI: https://doi.org/10.1590/0031-1049.2016.56.10

Miranda, M. J., & Cuezzo, M. G. (2014). Taxonomic revision of Bostryx stelzneri species complex, with description of a new species (Gastropoda: Orthalicoidea: Bulimulidae). American Malacolological Bulletin, 32(1), 74-93. DOI: https://doi.org/10.4003/006.032.0107

Ozgo, M. (2004). Cepaea nemoralis (L.) in Southeastern Poland: Association of morpho frequencies with habitat. Journal of Molluscan Studies, 71, 93-103. DOI: https://doi.org/10.1093/mollus/eyi012

Parodiz, J. J. (1947). Contribuciones al conocimiento de los moluscos terrestres Sudamericanos, 5. Comunicaciones Zoológicas del Museo Historia Natural de Montevideo, 2, 1-32.

Pfenninger, M., & Magnin, F. (2001). Phenotypic evolution and hidden speciation in Candidula unifasciata ssp. (Helicellinae, Gastropoda) inferred by 16s variation and quantitative shell traits. Molecular Ecology, 10, 2541-2554. DOI: https://doi.org/10.1046/j.0962-1083.2001.01389.x

Pilsbry, H. A. (1901). Manual of Conchology, Pulmonata (2a serie). Philadelphia, United States: Palala Press.

Ploeger, S., & Breure, A. S. H. (1977). A rapid procedure for preparation of radulae for routine research with the scanning electron microscope. Basteria, 41, 47-52.

Quintana, M. (1982). Catálogo preliminar de la malacofauna del Paraguay. Revista Museo Argentino de Ciencias Naturales, Zoología, 11, 61-158.

Ramírez, R., Paredes, C., & Arenas, J. (2003). Moluscos del Perú. Revista de Biología Tropical, 51, 225-284.

Rohlf, F. J. (2017a). TpsDig (Version 2.31). Retrieved from https://life.bio.sunysb.edu/morph/soft-dataacq.html

Rohlf, F. J. (2017b). TpsRewl (Version 1.69). Retrieved from https://life.bio.sunysb.edu/morph

Rohlf, F. J. (2019). TpsUtil (Version 1.78). Retrieved from https://life.bio.sunysb.edu/morph/

Signorelli, J. H., Márquez, F., & Pastorino, G. (2012). Phenotypic variation of south-western Atlantic clam Mactra isabelleana (Bivalvia: Mactridae). Journal of the Marine Biological Association of the United Kingdom, 93(2), 1-7. DOI: https://doi.org/10.1017/S0025315412000410

Smith, U. E., & Hendricks, J. R. (2013). Geometric Morphometric Character Suites as Phylogenetic Data: Extracting Phylogenetic Signal from Gastropod Shells. Systematic Biology, 62(3), 366-385. DOI: https://doi.org/10.1093/sysbio/syt002

Surmacki, A., Ozarowska-Nowicka, A., & Rosin, Z. M. (2007). Color polymorphism in a land snail Cepaea nemoralis (Pulmonata: Helicidae) as viewed by potential avian predators. Naturwissenschaften, 100, 533-540. DOI: https://doi.org/10.1007/s00114-013-1049-y

Zischka, R. (1953). Catálogo de las conchas y caracoles bolivianos. Folia Universitaria, 10, 69-85.

Downloads

Published

2020-03-31

Issue

Vol. 68 No. 1 (2020): Revista de Biología Tropical (Int. J. Trop. Biol.): Continuous publication, January - March 2020

Section

ARTICLE

License

Copyright (c) 2020 María José Miranda

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Creative Commons Attribution 4.0 License (CC BY 4.0)

Attribution (BY)  •  (BY) You must attribute the work in the manner specified by the author or licensor (but not in any way that suggests that they endorse you or your use of the work).