Archaeopolycentra achupomotet Melnitsky et Ivanov, 2021

Melnitsky, S. I. & Ivanov, V. D., 2021, Two new species of the genus Archaeopolycentra (Trichoptera: Polycentropodidae) from Cretaceous Taimyr amber, Far Eastern Entomologist 444, pp. 1-7 : 4-6

Archaeopolycentra achupomotet Melnitsky et Ivanov , sp. n.

http://zoobank.org/NomenclaturalActs/ 41F1A48A-DC63-407A-A311-D810A3BA7C81

Figs 4–6

TYPE MATERIAL. Holotype: ♂, PIN 3311 /2871, Russia: Taymyr amber,

Yantardakh, 3 km above the mouth of Maimecha river, Eastern Taymyr. Kheta formation, Santonian.

DESCRIPTION. Head, antennae and palpi yellowish brown. Legs, abdomen,

thorax and wings light brown. Antennae shorter than forewings, light brownish-

yellowish. Wings with long dark hairs obscuring the wing venation.

Male genitalia. Posteroventral margin of sternite IX with 2 tubercles. Projections of the segment X long, with complex bending in the subapical part and truncate sides of triangular apical plates, equal in length to the aedeagus. Inferior appendages

(gonopods) hairy, wide with deep incision separated them into longer and narrower dorsal lobe, and shorter and wider ventral lobe. Apices of the gonopod lobes pointed in the ventral view. External surfaces of gonopods covered with numerous hairs.

Aedeagus large, rounded at apex with two sclerites in the ventral view. Distal part of aedeagus with 2 long clavate downward directed lateral processes.

ventral; 5 – genitalia.

MEASUREMENTS. Body length 2.3 mm; forewing length 3.0 mm.

DIAGNOSIS. The new species is related to Archaeopolycentra zherikhini

Botosaneanu et Wichard, 1983 and Archaeopolycentra yantardakh Ivanov et

Melnitsky, 2017 from the same locality. The diagnostic characters are the different shape of the inferior appendages: the dorsal lobe is equal to ventral in the new species and in A. yantardakh, and shorter in A. zherikhini; the incision of these appendages is very deep in A. yantardakh while in the new species and in A.

zherikhini it is more shallow. The shape of the aedeagal clavate processes is also characteristic for the new species: they are long in the new species with sclerotized widened apex, non-visible in A. zherikhini, and short and apically pointed in A.

yantardakh. The shape of projections of segment X is suggestive; in A. zherikhini,

the projections of segment X are uniformly narrow with a small hook at apex, short and almost straight in A. yantardakh and long with apical hook and triangular apex in the new species. This species differs from the above described A. achupomotet

sp. n. in the shape of inferior appendages, apical parts of projections of segment X,

and in configuration of the lateral processes of aedeagus.

ETYMOLOGY. Arbitrary combination of letters.

Figures

Figs 4, 5. Archaeopolycentra achupomotet sp. n. (holotype, male): 4 – general view,

Fig. 6. Archaeopolycentra achupomotet sp. n. (holotype, male): genitalia, ventral. Abbreviations as in Fig. 3