Glandulariini

Jałoszyński, Paweł & Perkovsky, Evgeny, 2016, Diversity of Scydmaeninae (Coleoptera: Staphylinidae) in Upper Eocene Rovno amber, Zootaxa 4157 (1), pp. 1-85 : 72

Glandulariini genus & species indet. 1

( Figs 33 , 217–220 )

Material studied. Late Eocene of Europe , Rovno amber: sex unknown; inclusion in slightly irregular pyramid of amber 9.5 mm long ( Fig. 33 ), collection number K-6274 ( SIZK).

This specimen is very poorly visible inside particularly turbid piece of amber, and proper description is not possible. The beetle has BL about 1.73 mm; HL about 0.30 mm, HW about 0.30 mm, AnL about 0.34 mm; PL about 0.28 mm, EL about 0.55 mm.

Remarks. This specimen can only be assigned to the tribe (based on the structure of maxillary palps). It is exceptionally interesting because of a hypopus (phoretic deutonymph) of a mite belonging most likely to the family Acaridae attached to the clavate portion of the left profemur ( Figs 219–220 ). The first author frequently finds hypopi of astigmatid (acarid and histiostomatid) mites attached to various body parts of extant species of Scydmaeninae , especially those associated with habitats rich in decaying plant debris, although this association remains unrecorded in literature. For the first time we demonstrate that astigmatid mites have been using Scydmaeninae (of which many are known as predators of acaridid, oribatid and/or uropodine mites, see Jałoszyński (2012d), Jałoszyński & Olszanowski (2013, 2015, 2016) as means of dispersal at least since Lower Eocene.

Figures

FIGURES 21 – 34. Specimens of Rovno amber with inclusions of Scydmaeninae. K- 8972, Rovnoscydmus sp. specimen 8 (21); K- 3322, Rovnoscydmus sp. specimen 9 (22); K- 15548,? Rovnoscydmus sp. specimen 10 (23); K- 8971,? Rovnoscydmus sp. specimen 11 (24); K- 6045, Euconnus palaeogenus sp. n. (25); K- 9126, Euconnus sp. 1 (26); K- 24859,? Euconnus sp. 2 (27); K- 24302, Stenichnus proavus sp. n. (28); UA- 2216, Microscydmus sp. 1 (29); K- 6943,? Microscydmus sp. 2 (30); K- 3657 a,? Microscydmus sp. 3 (31); K- 6764,? Scydmoraphes sp. 1 (32); K- 6274, Glandulariini gen. & sp. indet. 1 (33); K- 7089, Glandulariini gen. & sp. indet. 2 (34).

FIGURES 217 – 220. Glandulariini gen. & sp. indet. 1 (K- 6274). Habitus in ventrolateral (217, 218) and dorsolateral (219) views, right profemur with a foretic deutonymph of? Acaridae (220).