A species being worthy of its name: Intraspecific variations on the gnathosomal characters in topotypic heteromorphic males of Cheylostigmaeus variatus (Acari: Stigmaeidae)

Abstract

Cheylostigmaeus variatus (Acari: Stigmaeidae) is only known from Turkey. It has been called variatus, due to showing variations in the shapes of lamellae and dorsal cheliceral surfaces in the heteromorphic males. During the present work, we found five topotypic heteromorphic male specimens among mite specimens in the grassy soil and moss collected from the type locality, Ekşisu Marsh in Erzincan province, Turkey. These topotype specimens of the species including holotype and paratype were examined. During the examination, we observed variations in the shapes of lamellae, dorsal cheliceral surfaces and apophyses on the internal and external surfaces of palp femur. We consider that the differences observed in the heteromorphic male specimens are intraspecific variations, that it is true to its epithet name and that there is not enough evidences to justify a new species. This hypothesis may be supported by the rearing of a population of the species or molecular evidence.

Keywords

• Gnathosoma,heteromorphic,intraspecific,mite,morphology,variation

References

1. Akyol, M. 2011. A new record of Storchia ardabiliensis and variations in the number of genital, aggenital and external clunal setae in two Storchia species (Acari, Stigmaeidae) from the Aegean coast, Turkey. Systematic and Applied Acarology, 16: 59-66. doi: 10.11158/saa.16.1.8
2. Bı̇ngül, M. and Doğan, S. 2017. Zetzellia erzincanica sp. nov., an intermediate species between the genera Zetzellia and Agistemus (Acari, Stigmaeidae). Systematic and Applied Acarology, 22: 14-20. doi: 10.11158/saa.22.1.3
3. Bı̇ngül, M., Doğan, S. and Dilkaraoğlu, S. 2017a. Contributions to the knowledge of the mite genus Stigmaeus Koch, 1836 (Acari: Stigmaeidae) of Turkey. European Journal of Taxonomy, 307: 1-16. doi: 10.5852/ejt.2017.307
4. Bingül, M., Doğan, S., Dilkaraoğlu, S. and Kesik, O.A. 2016. Determination of urban mites (Acari) and their mapping by geographical information system (GIS): A case study in Erzincan. International Erzincan Symposium, 28 September–1 October, Erzincan, Turkey, 943-954.
5. Bingül, M., Doğan, S. and Doğan, S. 2018. Asymmetric variations in some species of the genus Raphignathus (Acari: Raphignathidae). Trakya University Journal of Natural Sciences, 19: 55-58. doi: 10.23902/trkjnat.334190
6. Bı̇ngül, M., Doğan, S. and Doğan, S. 2017b. Morphological abnormalities in some stigmaeid species of Eustigmaeus, Stigmaeus and Storchia (Acari: Raphignathoidea: Stigmaeidae). Systematic and Applied Acarology, 22: 2119-2126. doi: 10.11158/saa.22.12.7
7. Dilkaraoğlu, S., Doğan, S., Erman, O., Sevsay, S. and Adil, S. 2016a. Some morphological variations and abnormalities in females of Stigmaeus longipilis (Canestrini) (Acari: Stigmaeidae). Turkish Bulletin of Entomology, 6: 149-159. doi: 10.16969/teb.06297
8. Dilkaraoğlu, S., Doğan, S., Erman, O., Sevsay, S. and Adil, S. 2016b. Stigmaeid mites (Acari: Raphignathoidea: Stigmaeidae) of Harşit Valley and Örümcek Forests (Turkey). Erzincan University Journal of Science and Technology, 9: 10-72. doi: 10.18185/eufbed.18373

9. Doğan, S. 2007. Checklist of raphignathoid mites (Acari: Raphignathoidea) of Turkey. Zootaxa, 1454: 1-26.
10. Doğan, S. 2019. Raphignathoidea (Acari: Trombidiformes) of Turkey: A review of progress on the systematics, with an updated checklist. Acarological Studies, 1 (2): 129-151.
11. Doğan, S. and Bingül, M. 2017. A contribute to the knowledge on mite diversity in Turkey: Cheylostigmaeus tarae (Acari: Stigmaeidae). Acta Biologica Turcica, 30: 70-73.
12. Doğan, S., Bingül, M., Dilkaraoğlu, S. and Fan, Q.-H. 2015a. Description of a new species of the genus Stigmaeus Koch (Acari: Stigmaeidae) from Turkey, with a list of described species in the world. International Journal of Acarology, 41: 290-299. doi: 10.1080/01647954.2015.1028441
13. Doğan, S., Dilkaraoğlu, S., Erman, O., Faraji, F., Bingül, M., Zeytun, E. and Ersin, F. 2016. Redescription of Stigmaeus solidus Kuznetsov (Acari, Stigmaeidae) based on the Turkish and Dutch specimens. Turkish Bulletin of Entomology, 6: 33-42. doi: 10.16969/teb.41380
14. Doğan, S., Dilkaraoğlu, S., Fan, Q.-H., Sevsay, S., Erman, O. and Adil, S. 2015b. Description of a species of the genus Cheylostigmaeus Willmann (Acari: Stigmaeidae) from Ekşisu Marsh, Turkey. Systematic and Applied Acarology, 20: 797-808. doi: 10.11158/saa.20.7.8
15. Doğan, S., Doğan, S. and Erman, O. 2017. Description of five new species of the genus Stigmaeus Koch (Acari: Raphignathoidea: Stigmaeidae) from Turkey. Zootaxa, 4276: 451-478. doi: 10.11646/zootaxa.4276.4.1
16. Erman, O., Özkan, M., Ayyıldız, N. and Doğan, S. 2007. Checklist of the mites (Arachnida: Acari) of Turkey, Second supplement. Zootaxa, 1532: 1-21.
17. Fan, Q.-H. and Flechtmann, C.H.W. 2015. Chapter 7. Stigmaeidae. In: Prospects for Biological Control of Plant Feeding Mites and Other Harmful Organisms. Carrillo, D., Moraes, G.J. and Peña, J. (Eds). Vol. 19. Springer, Switzerland, 185-206. doi: 10.1007/978-3-319-15042-0_7
18. Fan, Q.-H., Flechtmann, C.H.W. and de Moraes, G.J. 2016. Annotated catalogue of Stigmaeidae (Acari: Prostigmata), with a pictorial key to genera. Zootaxa, 4176: 1-199. doi: 10.11646/zootaxa.4176.1.1
19. Fan, Q.-H. and Zhang, Z.-Q. 2005. Raphignathoidea (Acari: Prostigmata). Fauna of New Zealand, 52: 1-400.
20. Koç, K. and Poyraz Tınartaş, E. 2017. Storchia mehrvari, a new record of the genus Storchia Oudemans, 1923 (Acari: Stigmaeidae) from Turkey and its abnormalities of genital and aggenital setae. Turkish Journal of Zoology, 41: 318-322. doi: 10.3906/zoo-1602-4
21. Walter, D.E. and Krantz, G.W. 2009. Collecting, rearing, and preparing specimens. In: A manual of Acarology, Third edition. Krantz, G.W. and Walter, D.E. (Eds). Texas Teach University Press, 83-96.