Zaitzeviola dubitabila
Zaitzeviola dubitabila (Mamaev & Zaitzev) Figs 53–55 This species, described as a Neocolpodia by Mamaev & Zaitzev (1998) and designated as type species of the genus Zaitzeviola by Fedotova & Sidorenko (2007a), was previously known from a single male collected in Kamchatka, in the Russian...
| Main Authors: | , |
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| Format: | Other/Unknown Material |
| Language: | unknown |
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2020
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| Online Access: | https://zenodo.org/record/5920202 https://doi.org/10.5281/zenodo.5920202 |
| Summary: | Zaitzeviola dubitabila (Mamaev & Zaitzev) Figs 53–55 This species, described as a Neocolpodia by Mamaev & Zaitzev (1998) and designated as type species of the genus Zaitzeviola by Fedotova & Sidorenko (2007a), was previously known from a single male collected in Kamchatka, in the Russian Far East. The present senior author examined and sketched that specimen in October 2012. Based on notes made on that occasion we were able to establish the identity of several porricondyline males collected in southeast Sweden with the species in question, Z. dubitabila. All our specimens, altogether 15 males, were Malaise trapped in 2015–2018 in five different sites on the island of Öland, so may be regarded as belonging to one and the same population. Even so, those specimens show an unusual extent of variation in the number of flagellomeres, ranging from 12 to 14, with 13 flagellomeres being the most common condition found. (In the holotype of Z. dubitabila only 8 flagellomeres are retained.) No such variation has been observed in any other species of Zaitzeviola, where a constant 14 flagellomeres is found (Jaschhof & Jaschhof 2013: 266 ff.). This might indicate that Z. dubitabila, on the one hand, and the six species regarded as congeneric in our 2013 revision of Zaitzeviola, on the other hand, are not as closely related as previously thought. Alternatively, Z. dubitabila might well be an untypical member of this genus in that male morphology includes regressive character traits (note that this species is considerably smaller compared with other Zaitzeviola)―this hypothesis is favored here. Diagnosis. Zaitzeviola dubitabila differs from all congeneric species in having mostly fewer than 14 flagellomeres and the palpus being shorter than the head height. Circumfila are present on flagellomeres 1–8, which compares with 1–12 to 14 in other Zaitzeviola. Furthermore, Z. dubitabila is the only species of the genus in which true gonocoxal processes are absent (but there is a thin, membranous structure in the same ... |
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