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Scope: Munis Entomology & Zoology Publishes a Wide 326 _____________Mun. Ent. Zool. Vol. 14, No. 2, June 2019__________ A NEW SPECIES OF HYDROTHASSA C. G. THOMSON, 1859 FROM TURKEY (CHRYSOMELIDAE: CHRYSOMELINAE) Didem Coral Şahin* and Hüseyin Özdikmen** * Directorate of Plant Protection Central Research Institute, Ankara, TURKEY. E-mail: [email protected] ** Gazi University, Science Faculty, Department of Biology, 06500 Ankara, TURKEY. E- mails: [email protected]; [email protected] [Coral Şahin, D. & Özdikmen, H. 2019. A new species of Hydrothassa C. G. Thomson, 1859 from Turkey (Chrysomelidae: Chrysomelinae). Munis Entomology & Zoology, 14 (1): 326-343] ABSTRACT: A new species, Hydrothassa anatolica sp. nov., is described from Kayseri province in Turkey. For the time being, the species is endemic to the Turkey. Hydrothassa anatolica sp. nov., was compared to the related Palaearctic species in the subgenus Hydrothassa (Agrostithassa) Jakobson, 1921. It can be distinctively differentiated from these species based on body size, epipleural punctuation and aedeagal characters especially. In addition, the paper presents ultrastructures observed by SEM of aedeagus and spermatheca of Hydrothassa anatolica sp. nov. from Turkey for the first time. Photos of aedeagus and spermatheca in SEM as weel as in stereo microscope are given in the text. A short key of the species of subgenus Hydrothassa (Agrostithassa) Jakobson, 1921 is also given in the text. KEY WORDS: Coleoptera, Chrysomelidae, Chrysomelinae, Hydrothassa, new species, SEM, ultrastructures, aedeagus, spermatheca, Turkey, Palearctic region The genus Hydrothassa C. G. Thomson, 1859 (Coleoptera: Chrysomelidae: Chrysomelinae) is distributed in the Holarctic region (Seeno & Wilcox, 1982). It numbers 12 species, which occur in the Palaearctic and Nearctic regions (Winkelman & Debreul, 2008). Hydrothassa C. G. Thomson, 1859 that was accepted as a subgenus of the genus Prasocuris Latreille, 1802, is represented by 8 species in the Palaearctic region (Kippenberg in Löbl & Smetana, 2010). Palaearctic species classified into two subgenera (Warchalowski, 2003, 2010). Hydrothassa bicolora Rapilly, 1981 occurs only in Iran and Hydrothassa oblongiuscula (Fairmaire, 1884) occurs only in North Africa (Algeria and Tunisia). The remaining six species as Hydrothassa fairmairei (Brisout de Barneville, 1866), Hydrothassa flavocincta (Brullé, 1832), Hydrothassa glabra (Herbst, 1783), Hydrothassa hannoveriana (Fabricius, 1775), Hydrothassa marginella (innaeus, 1758) and Hydrothassa suffriani (Küster, 1852) are known from Europe (Warchalowski, 2003, 2010; Kippenberg in Löbl & Smetana, 2010). Two of them as Hydrothassa flavocincta (Brullé, 1832) and Hydrothassa glabra (Herbst, 1783) are distributed also in Turkey (Ekiz et al., 2013; Özdikmen, 2014). Many specimens of Hydrothassa was collected in Kayseri province, Turkey. They are described as a new species. The spermathecae and aedeagi were dissected from abdomen, remaining tissue were removed with fine tweezers. For light microscopic examination after cleaning, the samples were placed 70% ethanol and examined with Olympus SZX7 stereomicroscope. For scanning electron microscopy (SEM), cleaned samples were dehydrated using an ascending series of ethanol (70%, 80%, 90%, and 100%) and then air dried. After that the specimens were mounted onto SEM stubs using a double- sided adhesive tape, coated with gold using a Polaron SC 502 _____________Mun. Ent. Zool. Vol. 14, No. 2, June 2019__________ 327 Sputter Coater, and examined with a JEOL JSM 6060 Scanning Electron Microscope (SEM) at 10 kV. Hydrothassa (Agrostithassa) anatolica sp. nov. (Figs. 1-26) The new species Hydrothassa anatolica sp. nov., comes from central Anatolia of Turkey, Kayseri province (Fig. 1). Until now, it is a species endemic to Turkey, which was compared with closely related two Turkish and one North African species of Hydrothassa C. G. Thomson, 1859. It can be distinctively differentiated from these species based on its body size, epipleural punctuation and aedeagal characters especially. HOLOTYPE: Male – Turkey, Kayseri province, Sarız, Çörekdere, 38°28’50’’ N 36°27’29’’E, 1637 m, 06.VI.2018, leg. D. Coral Şahin. The holotype is stored in Nazife Tuatay Plant Protection Museum (NTM) (Turkey, Ankara). PARATYPES: Males – Turkey, Kayseri province, Sarız, Çörekdere, 38°28’50’’ N 36°27’29’’E, 1637 m, 06.VI.2018, leg. D. Coral Şahin, 32 specimens. Females – Turkey, Kayseri province, Sarız, Çörekdere, 38°28’50’’ N 36°27’29’’E, 1637 m, 06.VI.2018, leg. D. Coral Şahin. 26 specimens. The paratypes are stored in Nazife Tuatay Plant Protection Museum (NTM) (Turkey, Ankara). Description of holotype. Length: 3.02 mm. Body: Almost completely black (except for reddish lateral stripes on elytra and partly brownish black labrum and mouthparts). Upper side almost completely glabrous (except for antennae). Underside and legs clothed with short, very sparsely, recumbent or semirecumbent, light hairs. Head: Almost completely black (except for partly brownish black labrum and mouthparts). Almost completely glabrous (with sparsely light hairs on mouthparts and apical margin of clypeus and labrum). Fronto-clypeal suture distinct and archwise. Frontal callus sometimes visible. Head with distinct, scattered and sparsely punctures (except for labrum). The area between punctures larger than diameter of punctures. Antennae entirely black and clothed with short, very sparsely, semirecumbent, light hairs. Pronotum: Completely black. Entirely glabrous. Pronotum with distinct, scattered and sparsely punctures (similar on the head). Pronotum clearly transverse and approximately as long as 3/5 its width. Scutellum: Triangular. Completely black. Entirely glabrous. With a few distinct, scattered and sparsely punctures. Elytra: In the most part black and with reddish lateral stripes. Entirely glabrous. Each elytron with 11 regular rows of punctures (9 rows on black part and 2 rows on reddish lateral stripe). Punctures larger than on head and pronotum. Epipleura reddish with more or less fine and scattered punctures. Legs: Completely black and clothed with short, very sparsely, recumbent or semirecumbent, light hairs. Underside: Completely black and abdomen clothed with short, very sparsely, recumbent or semirecumbent, light hairs. Aedeagus and spermatheca of Hydrothassa anatolica sp. nov. were studied with both stereo microscope and SEM. Obtaining observations on ultrastructures of them are presented as follows: 328 _____________Mun. Ent. Zool. Vol. 14, No. 2, June 2019__________ Aedeagus: In lateral view, median lobe distinctly curved median foramen to apex (almost semicircularly). Strongly sharpened towards to apex (Figs. 2, 6, 7, 10). In dorsal view, median lobe at the apex broadly rounded (Figs. 2, 13-14, 16-17). Upper and lateral margins of orifice rounded (Figs. 2, 13-14, 16-17). Dorsal plate distinct, large and entire (Figs. 2, 13-14, 16-17). Median lobe in lateral parts and fore part of orifice thickened. Thickening in lateral parts smaller than the fore part (Figs. 2, 16-17). Median lobe behind the dorsal plate flattened (Figs. 2, 6-8, 13-14, 16-17). Median lobe especially in anterior half with distinct, scattered, irregular and sparsely ultrastructural pits (Figs. 7-15, 18). The pits located only in lateral parts of terminal part of median lobe in dorsal view. The terminal area from upper margin of orifice to aedeagal apex almost without ultrastructural pits in dorsal view. Dorsal plate and the area behind it with ultrastructural pits in dorsal view (Figs. 8-9, 13-18). Spermatheca: General view of spermatheca C-shaped (Figs. 3, 19-20). Nodulus almost equal width with cornu or slightly wider than apical part of cornu (Figs. 3, 19-20). Apex of cornu obtuse (Figs. 3, 19-20, 26). Collum + ramus distinct, clearly visible (Figs. 3, 19-23). Ductus spermatheca long and straight, but only broadly twisted, not spiral in streo microscope (not photographed). Ductus spermatheca ruptured in SEM (Figs. 19-23). Spermathecal gland long and straight (Figs. 19- 24). Nodulus, cornu, collum, ramus and spermathecal gland with scattered, irregular and sparsely ultrastructural pits (Figs. 21-24, 26). Female: The same male. No sexual dimorphism, but body size larger than the males. Variations: Body almost completely black, sometimes dark blue black or dark greenish black. Length of males 2.9-3.3 mm and females 3.3-3.7 mm. Differential diagnosis. The new species Hydrothassa anatolica sp. nov., exerts considerable morphological features differentiation from other species of the subgenus and genus. First of all, pronotal punctuation and aedeagus are unique in the new species. The closest species to the new species with regard to pronotal punctuation and aedeagal form is Hydrothassa suffriani (Küster, 1852). Elytra are uniformly colored in Hydrothassa suffriani (Küster, 1852) while elytra have orange lateral stripes in the new species. Pronotal punctuation is relatively denser and fine in Hydrothassa flavocincta (Brullé, 1832) while pronotal punctuation is relatively sparser and fine in the new species. In addition, epipleura is impuntated in Hydrothassa flavocincta (Brullé, 1832) while epipleura is punctated in the new species. Anyway, a size of Hydrothassa flavocincta (Brullé, 1832) was given as 3.4-4.4 mm by Warchałowski (2003, 2010), but it is correct only for females. A size of males is 2.9-3.2 mm. Pronotal punctuation is relatively denser and larger in Hydrothassa glabra (Herbst, 1783) and Hydrothassa oblongiuscula Weise, 1900 while pronotal punctuation is
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