A Review of the Palaearctic Species of the Genus Eurytoma Ill. of the robusta Group, with Description of a New Species f
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view of the Palaearctic Species of the Genus Eurytoma Ill. of the robusta Group, with Description of a New Species from Uzbekistan (Hymenoptera, Chalcidoidea: Eurytomidae) M. D. Zerovaa and V. N. Fursova,* a
I.I. Schmalhausen Institute of Zoology, National Academy of Sciences of Ukraine, Kyiv–30, 01030 Ukraine *e-mail: [email protected] Received February 10, 2020; revised June 4, 2020; accepted June 4, 2020
Abstract—A morpho-biological review and analysis of the Palaearctic species of the robusta group of the genus Eurytoma is presented. The differences between the species of the robusta group and the other species-groups of the genus Eurytoma are described. The hosts of the species of the robusta group and their geographical distribution are listed. A key to 62 Palaearctic species of the robusta group is compiled. A new species, Eurytoma uzbekistanica sp. n. belonging to the robusta species-group and morphologically closest to Eu. nochurae Zerova is described from Uzbekistan. Photographs of the types of Eu. uzbekistanica sp. n., Eu. herbaria Zerova, Eu. ibaraca Zerova, Eu. paramygdali Zerova et Fursov, Eu. armenica Zerova et Fursov, and Eu. nagoya Zerova, and also of the non-type specimens of Eu. dentata Mayr, Eu. robusta Mayr, and Eu. pyrrhidii Erdös are given. The holotype of the new species and material of the other species discussed are deposited in the collection of I.I. Schmalhausen Institute of Zoology of the National Academy of Sciences of Ukraine (Kyiv). Keywords: Eurytoma, robusta group, new species, Eurytomidae, Hymenoptera, Uzbekistan DOI: 10.1134/S0013873820040156
A new species of the genus Eurytoma Illiger (family Eurytomidae), reared in Uzbekistan from the anthodia of Rhaponticum sp. (Asteraceae), is described. The new species belongs to the robusta group comprising 62 species; the group was revised by the first author in 2010 (Zerova, 2010).
triangular (Eu. alhagicola), in the shape of an elongate projection (Eu. turkezia), or spatulate (Eu. herbaria). The insects belonging to the robusta group are medium-sized (usually about 3.0 mm, less frequently about 2.0 mm long); only several species reach the length of 4.5–5.0 mm (Eu. robusta, Eu. tripeticola, Eu. ibaraca, Eu. armenica).
The species of this group are characterized by the following features: the mesosternal keel is developed; the eyes are bordered; the posterogenal carina is high and sharp; the marginal vein is relatively short, as long as, or slightly longer than the radial vein; the female gaster in many species has a long petiole; the funicular segments of the male are bi-apically convex, covered with long hairs. Many species of this group are characterized by a distinctive structure of the fore coxa with a high projection of the anterior margin in both sexes. The main character uniting the species of the robusta group is the presence of a mesosternal keel which is only rarely low (Eurytoma wachtli, Eu. asiatica, Eu. laserpitii) but usually distinct: hook-shaped (Eu. dentata),
The trophic associations of the species of the robusta group
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