Allopsontus stepposus sp. n., a new species of bristletail (Microcoryphia, Machilidae) from the western coast of Сrimea

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Abstract

A new species of bristletail, Allopsontus stepposus sp. n., is described from the western Crimea. In the structure of the antennal flagella, the chaetotaxy of the maxillary and labial palps, the sensory field on the fore femora, the abdominal sternites and parameres, it seems to be especially similar to A. tauricus Kaplin 2024, described from a nearby area in western Crimea. These two species are clearly distinguished by the pattern formed by differently colored scales on the dorsal side of the abdomen, as well as the color and shape of the paired ocelli. The species also differ in the width to length ratio of the paired ocelli, the structure of the 3rd article of the labial palp, and the size of the apical angle of the abdominal sternites.

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About the authors

V. G. Kaplin

All-Russian Research Institute of Plant Protection

Author for correspondence.
Email: ctenolepisma@mail.ru
Russian Federation, Saint Petersburg

References

  1. Каплин В. Г., 1983. К фауне щетинохвосток (Thysanura) южного побережья Крыма // Вестник зоологии. № 5. С. 15–20.
  2. Каплин В. Г., 2024. Новый вид щетинохвосток рода Allopsontus Silv. (Microcoryphia, Machilidae) из западного Крыма // Зоологический журнал. Т. 103. № 2. С. 13–19.

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2. Fig. 1. Allopsontus stepposus sp. n., details of male structure: 1 - anterior part of the head (compound eyes, paired and unpaired ocelli, clypeus and upper lip, antennal bases); 2 - apical chain and one segment of the preapical chain of the antennal flagellum; 3 - main segment (scapus) of the antenna; 4 - apical segment of cerci; 5 - mandibular seta; 6 - maxilla; 7 - mandibular seta; 8 - trochanter, femur, tibia and tarsus of foreleg; 9-11 - respectively hind tarsus (9), tibia (10) and femur (11) of hind leg (1-11 - holotype). Scale 0.1 mm

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3. Fig. 2. Allopsontus stepposus sp. n., details of structure of sexual apparatus, tergites, sternite and coxites of abdomen of male: 1 - penis, paramere and coxite of IX segment of abdomen of male with slate; 2 - coxites with slate and sternite of IV segment of abdomen; 3 - VIII tergite of abdomen (part); 4 - X tergite of abdomen (part) (penis, paramere and coxite of IX segment of abdomen of male with slate (1-4 - holotype)). Scale 0.1 mm

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