Macrosiphoniella (Ramitrichophorus) medvedevi
Creators: name: Stekolshchikov, Andrey V.
name: Buga, Sergey V.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Aphididae
Macrosiphoniella
Macrosiphoniella medvedevi

description: Macrosiphoniella (Ramitrichophorus) medvedevi (Bozhko, 1950)
(Figs. 3, 42–63, Tabl. 4–5)
Material. Syntype: Macrosiphoniella (Ramitrichophorus) medvedevi (Bozhko, 1950) —2 apterous viviparous female, „ Russia [mistake, right— Ukraine], Helichrysum arenarium, Smiev, 3.viii.1947, Leg. Bozhko, Ramitrichophorus medvedevi Bozhko, Det. Bozhko ” (from collections of NHM); Paratypes: Macrosiphoniella (Ramitrichophorus) nasti Szelegiewicz, 1958 —4 apterous viviparous female, „ Polonia, Bydgoszcz, 30.vii.1956, Helichrysum arenarium, leg. Szelegiewicz, Paratypus, Macrosiphoniella (Ramitrichophorus) nasti sp. n., det. Szelegiewicz, 1957” (from collections of MNHN and NHM). Additional materials: 2 apterous viviparous females, 03.vii.1947, Ukraine, Helichrysum arenarium (from collections of MNHN); 4 apterous viviparous females, 06.viii.1957, Poland, Kuyavian-Pomeranian Voivodeship, Bydgoszcz, Helichrysum arenarium (from collections of MNHN); 1 apterous viviparous female, 1 male and 16 oviparous female, 20.ix.1962, Poland, Kuyavian-Pomeranian Voivodeship, Bydgoszcz, Helichrysum arenarium (from collections of IE BC CAS); 3 apterous viviparous females, 25.vii.1965, Poland, Mazovian Voivodeship, Otwock County, Otwock, Helichrysum arenarium (from collections of IE BC CAS); 37 apterous viviparous females and 16 alate viviparous female, 26.vii.1969, Russia, Moscow Province, Serpukhovsky District, Luzhki Vill., Helichrysum arenarium (from collections of IE BC CAS). Also used data from Bozhko (1950, 1957, 1976), and Szelegiewicz (1958).
Etymology. The species was named in honor of the famous Soviet Ukrainian entomologist Sergei Ivanovich Medvedev.
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Description. Apterous viviparous female. Body elongate elliptical, 1.6–2.0 times as long as wide. The living specimens reddish yellow, with a large black patch on dorsum of abdomen (this patch is absent in macerated specimens), with dark head, antennae, legs (except bases of femora), siphunculi and cauda; with distinct waxy pulverulence, in this case, the aphids are gray with brown-red streaks. Cleared specimens with dark brown front, antennae (except base of 3rd antennal segment), distal half of the rostrum, legs (except base of femora) and siphunculi, with brown head (except front), sclerites at the base of the coxae, peritremes, anal plate and cauda, with light-brown bands and scleroites on thorax and abdomen and subgenital plate. Thorax with more or less wide bands on pro- and mesonotum and row of sclerites on metanotum; abdomen with rows of spinal sclerites, with small marginal sclerites and peritrems on I–VII segments, with antesiphuncular sclerites and with band on VIII tergite; sclerites on the thorax and abdomen are often small, pale and rare; sclerites on VII tergite often and on metanotum sometimes fused to form a short band. Surface of head, thoracic dorsum and abdominal tergites I–V smooth, sometimes weakly wrinkled, on VI–VII abdominal tergites with rows of small pointed spinules, which on VIII abdominal tergite partially fuse to form scales; thoracic venter smooth, ventral abdomen with long rows of small hardly visible spinules, sometimes forming strongly elongate cells. Setae on head, thorax and dorsum long, finely pointed, often bifurcating at the apices, in this case, each of the teeth of the fork is finely pointed. Third antennal segment with 11–30 secondary rhinaria, fourth segment with 0–4, fifth with 0 rhinaria. Rhinaria with internal diameter 6–23 μm, with external diameter 2.7–5.5 times as long as high of rhinaria. Setae on antennae blunt, pointed or rarely very weakly capitate. Rostrum is often very long, reaching abdominal segment III–V. Ultimate rostral segment 5.1–8.2 times as long as its basal width. Setae on legs pointed or finely pointed. Peritremes on abdominal segments I and II separated by a distance equal to or less than diameter of peritreme. Siphunculi with polygonal reticulation on distal 0.33–0.53 of length (largest transverse row in reticulate part of siphunculi consisting of 4–7 cells). Subgenital and anal plates with finely pointed setae. Cauda nearly triangular, with some constriction in the middle, which divides it into broad base and conical and rounded on apex distal part; setae on cauda long and finely pointed.
Alate viviparous female. Body elongate elliptical, 2.1–2.5 times as long as wide. The living specimens with dark head and thorax. Cleared specimens with dark brown thorax; abdomen with distinct brown marginal sclerites on segments I–VII, spinal sclerites on abdominal tergites I–VI very small, light-brown or often absent, antesiphuncular sclerites hardly visible. Third antennal segment with 22–32 secondary rhinaria, fourth segment with 2–11, fifth with 0–1 rhinaria. Rostrum is often very long, reaching abdominal segment II–V. Peritremes on abdominal segments I and II separated by a distance less than diameter of peritreme or fused. Siphunculi with polygonal reticulation on distal 0.48–0.60 of length.
Male. Body elongate elliptical, 2.0 times as long as wide. Colour of living specimens unknown. Tibiae of all legs dark brown only on the apices and brown in the middle. Marginal sclerites on I–VII segments distinct and sometimes relatively large. Third antennal segment with 33–37 secondary rhinaria, 4th segment with 9–11 and 5th segment with 4–5 secondary rhinaria. Siphunculi with polygonal reticulation on distal 0.35–0.46 of length. Cauda escuteon-shaped (misshapen specimen?). Hind tibiae with 1–3 round or oval pheromone plates.
Oviparous female. Body 1.7–2.1 times as long as wide. Colour of living specimens unknown. Tibiae of all legs dark brown only on the apices and brown or light-brown in the middle. Marginal sclerites on abdomen absent, spinal sclerites on abdominal tergites I–VI often small or also absent. Third antennal segment with 8–23 secondary rhinaria, fourth and fifth segments with 0 rhinaria. Rostrum reaching abdominal segment III–IV. Siphunculi with polygonal reticulation on distal 0.34–0.48 of length (largest transverse row in reticulate part of siphunculi consisting of 4–6 cells). Cauda nearly triangular, sometimes with very weak constriction in the middle. Hind tibiae more or less distinctly swollen on basal half, with 27–55 round or oval pheromone plates, more of them located on basal half.
Systematic relationships. The species is very close to Macrosiphoniella (Ramitrichophorus) janckei Börner, 1939. The differences between them are given in the keys.
Distribution. Germany (Mecklenburg-Vorpommern) (Müller 1969), Poland (West Pomeranian Voivodeship, Świnoujście and Kamień County, Międzyzdroje; Warmian-Masurian Voivodeship, Olsztyn; Kuyavian-Pomeranian Voivodeship, Bydgoszcz; Greater Poland Voivodeship, Poznań; Mazovian Voivodeship, Otwock County, Otwock; Podlasie Voivodeship, Mońki County, near Dolistowo Stare Vill.; Pomeranian Voivodeship, Nowy Dwór Gdański County, Krynica Morska) (Szelegiewicz 1958a, 1958b, 1967, 1968, 1974, 1975, 1978; Huculak 1965; Achremowicz 1967, 1975; Czylok et al. 1982; Nast et al. 1990; Węgierek & Wojciechowski 2004; Osiadacz & Hałaj 2010), Russia (Moscow Province, Serpukhovsky District, Luzhki Vill.), Ukraine (Kharkiv Province, Chuhuiv District, near Zmiiv) (Bozhko 1950, 1963, 1976), Kazakhstan (?) (Aktobe Region, near Aktobe and in Temir District, near Kalmakkyrgan railway station) (Smailova 1980), Iran (Rezwani et al. 1994).
Smailova (1980) indicates that two samples of M. (R.) medvedevi were collected from stems and pedicels of Helichrysum arenarium in Kazakhstan (Aktobe Region: near Aktobe and in Temir District, near Kalmakkyrgan railway station). Aphid colonies consisted of apterous viviparous females and immatures of 2–3 instars. However, Kadyrbekov in his summary on the fauna of aphids of Kazakhstan (2017) does not give this species for this territory, indicating that only two species have been found in Kazakhstan — M. (R.) janckei and M. (R.) hillerislambersi. Thus, the presence of M. (R.) medvedevi in Kazakhstan remains doubtful.
Biology. The species lives on stems, inflorescences and the lower surface of leaves of Helichrysum arenarium (L.) Moench, always attended by ants (Szelegiewicz 1958a, 1958b, 1967; Huculak 1965; Czylok et al. 1982), including Formica cinerea Mayr. (Szelegiewicz 1958a). Apterous male and oviparous females of M. (R.) medvedevi were found in Poland (Kuyavian-Pomeranian Voivodeship, Bydgoszcz) by Szelegiewicz on 20.ix.1962.
Previously, another species— Macrosiphoniella nikolajevi Kadyrbekov, 1999 —was included in the subgenus Macrosiphoniella.
description: Published as part of Stekolshchikov, Andrey V. & Buga, Sergey V., 2022, Revision of the aphid subgenus Ramitrichophorus Hille Ris Lambers of genus Macrosiphoniella (Hemiptera, Homoptera: Aphididae, Macrosiphini), with redescriptions of all known species and identification keys, pp. 293-342 in Zootaxa 5183 (1) on pages 319-332, DOI: 10.11646/zootaxa.5183.1.23, http://zenodo.org/record/7075519