358 research outputs found
Perissomyrmex nepalensis sp.nov. - new evidence of Old World origins for the genus (Hymenoptera, Formicidae)
No full textRadchenko, Alexander (2003): Perissomyrmex nepalensis sp.nov. - new evidence of Old World origins for the genus (Hymenoptera, Formicidae). Entomologica Basiliensia 25: 13-22, DOI: 10.5169/seals-98087
Karawajew's ant type specimens (Hymenoptera, Formicidae) in the National Museum of Natural History of the National Academy of Sciences of Ukraine
No full textMartynov, Alexander V., Radchenko, Alexander G. (2016): Karawajew's ant type specimens (Hymenoptera, Formicidae) in the National Museum of Natural History of the National Academy of Sciences of Ukraine. Zootaxa 4097 (2): 244-254, DOI: 10.11646/zootaxa.4097.2.
New species of the fossil ant genus Drymomyrmex (Hymenoptera, Formicidae, Formicinae) from the late Eocene Rovno amber (Ukraine)
No full textRadchenko, Alexander G. (2021): New species of the fossil ant genus Drymomyrmex (Hymenoptera, Formicidae, Formicinae) from the late Eocene Rovno amber (Ukraine). Palaeoentomology 4 (6): 544-549, DOI: 10.11646/palaeoentomology.4.6.
Drymomyrmex rasnitsyni Radchenko 2021, sp. nov.
No full textDrymomyrmex rasnitsyni sp. nov. (Figs 1–3) Holotype. Worker, SIZK No. DO-136, Ukraine, Rovno Prov., Dubrovitsy Distr., village Osova, Rovno amber, late Eocene. Etymology. The new species is named in honour of Professor Alexander P. Rasnitsyn, famous Russian paleoentomologist. Diagnosis. Head elongated; antennae 11-segmented; mesonotum completely fused with metanotum and the latter does not form a distinctly separate sclerite; meso- and metatibiae with well developed simple spurs. Type locality and horizon. Ukraine, Rovno Prov., Dubrovitsy Distr., village Osova, Rovno amber, late Eocene, Priabonian, 33.9–37.8 Ma. Description. Total length ca. 3.5 mm. Despite head width not properly measurable, head definitely elongated, seems at least ca. 1.4 times as long as wide; sides of head very slightly convex, subparallel, occipital corners narrowly rounded, occipital margin straight. Antennae 11-segmented, inserted to head just near posterior margin of clypeus; scape relatively short, slightly does not reach occipital margin; funicular segments gradually enlarged from 2 nd to apical, 1 st segment ca. twice as long as wide, 2–5 th transversal, 6–9 th subsquare, 10 th the longest, ca. 1.5 times as long as two preceding segments together. Eyes of moderate size (OI 0.26), situated approximately at midlength of sides of head, genae distinctly longer than maximum diameter of eye (GI 1.29). Ocelli absent. Surface of median portion of clypeus evenly convex, not truncated anteriorly over mandibles, its anterior margin feebly convex. Frontal carinae very short, not reaching level of anterior margin of eyes, clypeus not inserted between frontal carinae; anterior part of frons with not coarse longitudinal carina (instead of groove); frontal triangle small, but distinct. Mandibles triangular, but obscured, number of teeth cannot be counted. Maxillary and labial palps not visible. Mesosoma relatively stout, ca. 1.3 times as long as high, pro-mesonotal suture very clear and deep, mesonotum slightly raised above pronotum, inclined to propodeum; mesonotum fused with metanotum, so that metanotum does not form distinctly separate sclerite (seen from above); propodeal dorsum much lower than promesonotum (i. e., mesosoma does not form regular arch in profile); propodeum gradually rounded, without teeth or tubercles, its dorsal surface somewhat shorter than declivous one; propodeal spiracles rounded, located quite close to declivity. Petiole with short posterior peduncle, its scale slightly inclined forward, thick, relatively low, with subparallel anterior and posterior surfaces and widely rounded dorsum; gaster partially overhangs posterior petiolar peduncle. Metacoxae widely separated (seen from below). Legs of moderate length, fore femora quite wide, ca. 3 times as long as width; middle and hind tibiae with well developed simple spur, which longer than maximum width of tibia; pretarsal claws simple. Head dorsum and appendages with short and relatively sparse decumbent pubescence, length of appressed hairs subequal to distance between them, but such pubescence much denser in ventral and lateral surfaces of head, mesosoma and gaster, where hairs much longer than distance between them. Frons and occiput with infrequent quite long erect to suberect hairs, occipital margin and margin of temples also with very dense short subdecumbent hairs; mesosoma and petiole with rather long, often curved erect to suberect hairs, gaster with similar, but shorter hairs; antennae and legs with numerous quite short subdecumbent hairs, tarsi additionally with numerous coarse bristles. Body and appendages brownish-black. Gynes and males. Unknown. Measurements (in mm). HL 0.69, SL 0.49, OL 0.18, GL 0.23, ML 0.98, MH 0.43, HTL 0.74. Indices: SI 0.72, OI 0.26, GI 1.29, MI 2.27.Published as part of Radchenko, Alexander G., 2021, New species of the fossil ant genus Drymomyrmex (Hymenoptera, Formicidae, Formicinae) from the late Eocene Rovno amber (Ukraine), pp. 544-549 in Palaeoentomology 4 (6) on pages 545-546, DOI: 10.11646/palaeoentomology.4.6.4, http://zenodo.org/record/577856
FIGURE 2 in New species of the fossil ant genus Drymomyrmex (Hymenoptera, Formicidae, Formicinae) from the late Eocene Rovno amber (Ukraine)
No full textFIGURE 2. Photograph of piece of amber with the holotype worker of Drymomyrmex rasnitsyni sp. nov.Published as part of Radchenko, Alexander G., 2021, New species of the fossil ant genus Drymomyrmex (Hymenoptera, Formicidae, Formicinae) from the late Eocene Rovno amber (Ukraine), pp. 544-549 in Palaeoentomology 4 (6) on page 546, DOI: 10.11646/palaeoentomology.4.6.4, http://zenodo.org/record/577856
Figs 18-24 in Perissomyrmex nepalensis sp.nov. - new evidence of Old World origins for the genus (Hymenoptera, Formicidae)
No full textFigs 18-24. Details of structure of P. monlicola de Andrade (paratype worker): 18, head, frontal view; 19, lower part of clypeus; 20, alitrunk and waist in profile; 21, alitrunk and waist from above; 22, antennal scape, lateral view; 23, antennal scape, dorsal view; 24, tibia and first tarsal joint of hind leg. Scale lines 2 mm; short line: Figs 18, 20, 21; long line: Figs 19, 22-23.Published as part of Radchenko, Alexander, 2003, Perissomyrmex nepalensis sp.nov. - new evidence of Old World origins for the genus (Hymenoptera, Formicidae), pp. 13-22 in Entomologica Basiliensia 25 on page 22, DOI: 10.5169/seals-980871, http://zenodo.org/record/753852
Comparative analysis of the population structure of Crematogaster subdentata and Lasius neglectus in the primary and secondary ranges (Hymenoptera: Formicidae)
No full textStukalyuk, Stanislav, Radchenko, Alexander, Reshetov, Alexander, Akhmedov, Ascar, Goncharenko, Igor (2021): Comparative analysis of the population structure of Crematogaster subdentata and Lasius neglectus in the primary and secondary ranges (Hymenoptera: Formicidae). Fragmenta entomologica (London, England) 53 (1): 43-56, DOI: 10.13133/2284-4880/436, URL: http://dx.doi.org/10.13133/2284-4880/43
Figs 1 – 7 in New data on the distribution and ecology of Myrmica ravasinii Finzi, 1923 (Hymenoptera, Formicidae)
No full textFigs 1 – 7. Details of structure of Myrmica ravasinii (1-3, worker, syntypes; 4, 5, male) and M. caucasicola (6, 7, male). 1 – head, dorsal view; 2 – antennal scape, lateral view; 3 –antennal scape, dorsal view; 4, 6 – hind tibia and basitarsus; 5, 7 – antennal scape and three basal funicular segments. Scale bars – 1 mm (draw by A. Radchenko).Published as part of Alexander Radchenko, Zalimkhan Yusupov & Yury Komarov, 2016, New data on the distribution and ecology of Myrmica ravasinii Finzi, 1923 (Hymenoptera, Formicidae), pp. 1 - 7 in Asian Myrmecology 8 on page 2, DOI: 10.20362/am.008011, http://zenodo.org/record/27023
Fig. 2 in Comparative analysis of the population structure of Crematogaster subdentata and Lasius neglectus in the primary and secondary ranges (Hymenoptera: Formicidae)
No full textFig. 2 – Scheme of the foraging areas of Lasius neglectus in Rostov-on-Don species; trees: Pc – Prunus cerasus, Ps – Prunus spinosa, Ul – Ulmus sp.Published as part of Stukalyuk, Stanislav, Radchenko, Alexander, Reshetov, Alexander, Akhmedov, Ascar & Goncharenko, Igor, 2021, Comparative analysis of the population structure of Crematogaster subdentata and Lasius neglectus in the primary and secondary ranges (Hymenoptera: Formicidae), pp. 43-56 in Fragmenta entomologica (London, England) 53 (1) on page 48, DOI: 10.13133/2284-4880/436, http://zenodo.org/record/816519
Myrmecocystus (Cataglyphis) bicolor subsp. bellicosus Karawajew 1924
No full textMyrmecocystus (Cataglyphis) bicolor F. subsp. bellicosus Karawajew, 1924: 307, w. Current status: Cataglyphis bellicosus. Combination in Cataglyphis: Agosti, 1990: 1487. Raised to species: Radchenko, 1997 b: 434. Type locality(-ies): “ Steinbruch bei Douchat-abad, 4 Kilometer südwärts von Teheran (Persien), 23.IX. 1916, Bocquillon, Arbeiter. Typen in meiner Sammlung und dem Kaukasischen Museum (Tiflis)”. Original Karawajew label(-s): “ Myrmecocystus (Cataglyphis) / bicolor F. subsp. Bellicosu s Karav. / Typus V. Karavaiev, 1916 / 23.IX. 1916 +оухан-абадъ бл.?еге- / рана, Персия. Неизв. собиратель. Кавк. Муз. [= Doukhan-abad near Teheran, Persia, Unknown collector, Caucasian Museum]” (see also Fig. 4). Material: SYNTYPES, 3 w (newly mounted, IN 314 / 6 / 1). Notes. The type locality was given in the original description as “Douchat-abad” (in German), but in the original labels this place was spelled in Russian as “+оухан-абадъ” [= Doukhan-abad, in English]. Radchenko (1997 b) believed that the type specimens of C. bellicosus were lost and designated the neotype worker: “Керман, ю-в Персия, В. Кузнецов, 23.III. 928 ” [= Kerman, SE Persia, V. Kuznetzov]. As the syntype specimens of this species have been found, the neotype specimen has lost its taxonomic value.Published as part of Martynov, Alexander V. & Radchenko, Alexander G., 2016, Karawajew's ant type specimens (Hymenoptera, Formicidae) in the National Museum of Natural History of the National Academy of Sciences of Ukraine, pp. 244-254 in Zootaxa 4097 (2) on page 248, DOI: 10.11646/zootaxa.4097.2.6, http://zenodo.org/record/25576
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