Galendromus (Galendromus) longipilus (Nesbitt)

Tixier, Marie-Stephane, Auger, Philippe, Migeon, Alain, Douin, Martial, Fossoud, Amandine, Navajas, Maria & Arabuli, Tea, 2021, Integrated taxonomy supports the identification of some species of Phytoseiidae (Acari: Mesostigmata) from Georgia, Acarologia 61 (4), pp. 824-844 : 834-836

Galendromus (Galendromus) longipilus (Nesbitt)

Typhlodromus longipilus Nesbitt 1951: 26 .

Typhlodromus (Typhlodromus) longipilus, Cunliffe & Baker 1953: 17 .

Typhlodromus (Typhlodromus) longipilis [sic], Chant 1959: 59.

Galendromus longipilis [sic], Muma 1961: 26.

Metaseiulus longipilus, Schuster 1966: 323 .

Metaseiulus (Galendromus) longipilus, Wainstein 1973: 176 .

Typhlodromus longipilis [sic], Ozman & Çobanoğlu 2001: 482.

Typhlodromus longipilis [sic], Çobanoğlu & Özman 2002: 92.

Galendromus longipilus, Kolodochka 2006: 171 .

Metaseiulus longipilis [sic], Kulikova 2011: 59.

Specimens examined. At Kobuleti (Khala) (41.7070° N, 41.7912° E): 2 ♀♀ and 1 ♂ on Rubus sp. (Rosaceae) .

Previous records. Austria, Bulgaria, Canada, Costa Rica, Cuba, Czech Republic, France, Galapagos, Germany, Hungary, Italy, Mexico, Moldova, Poland, Slovakia, Spain, Switzerland, Turkey, Ukraine, USA.

Measurements of females (2 specimens)

Dorsum. Dorsal shield 340 long and 155 wide, reticulated throughout, with two visible solenostomes (gd6 and gd9), 16 pairs of dorsal setae and one pair of sub-lateral setae inserted in the dorsal shield: j1 25, j3 65–67, j4 52–55, j5 60–62, j6 65–70, J2 75, J5 8, z2 67, z4 67–70,

z5 62, Z4 70–75, Z5 60–65, s4 65–70, s6 80–82, S2 75–77, S5 62–70 and r3 55–57 in length.

All setae smooth.

Peritreme. Extending slightly anteriorly to the bases of the setae z4.

Venter. Sternal shield with three pairs of setae and two pairs of poroid; one pair of sternal setae (st4) on small metasternal platelets; posterior margin straight. Distances between st1–st3 65–72, st2–st2 47–52, st5–st5 47. Two pairs of metapodal plates, the largest one 25 long and

4 wide, the smallest one 10 long and 2 wide. Ventrianal shield with four pairs of pre-anal setae JV1, JV2, JV3, ZV2 and a pair of small circular pre-anal pores (gv3) present, immediately posterior-mediad to JV3. Integument surrounding ventrianal shield with 3 pairs of setae ZV1,

ZV3 and JV5 ; ventrianal shield 107 long, 50–55 wide at level of anterior corners, and 65 wide at level of anus. JV5 55–57 long.

Legs. Legs IV with one long setae on the basitarsus 35. Genu II with nine setae (2–2/1,

2/1–2), Genu III with seven setae (1–2/1, 2/0–1).

Chelicera. Fixed digit 22 long; and movable digit 20 long. Dentition not visible because chelicerae closed.

Spermatheca. Spermatheca with elongated and tubular cervix 37 long and 3 wide, with a small atrium inserted at the base of the cervix.

Remarks. The measurements of the Georgian specimens are close to those reported in the re-description of G. longipilus provided by Chant and Yoshida-Shaul (1984) ( Table 3). Some differences are however observed in some seta lengths, which are slightly shorter in the specimens examined in this study.

Galendromus longipilus is morphologically very close to Galendromus occidentalis (Nesbitt) . However, because of the peritreme length and because j6 is longer than the distance between j6 and J2, we conclude that the specimens herein examined belong to G. longipilus .

No material preserved in 100% ethanol was available for DNA analysis; therefore, we could not strengthen the identification with molecular markers at this time.

This is the first report of G. longipilus from Georgia. This occurrence is however consistent with the reported distribution of this species from Turkey and Europe.