Electromyrmex wheeleri, Radchenko & Dlussky, 2018

Radchenko, A. G. & Dlussky, G. M., 2018, A New Species Of The Extinct Ant Genus Electromyrmex (Hymenoptera, Formicidae), Vestnik Zoologii (Vestn. Zool.) 52 (5), pp. 361-366 : 363-364

Electromyrmex wheeleri sp. n.

urn:lsid:zoobank.org:act:0FAD2BD1-6D2D-4064-91BA-2C394A832B90

Electromyrmex sp. A : Dlussky, Rasnitsyn, 2009: 1031; Perkovsky, 2016: 116.

Material examined. Holotype Ơ: Baltic Amber, Late Eocene, GPIH number 4937, coll. Gröhn No. 6737, paratype Ơ: Bitterfeld amber, Late Eocene , Germany ( MNKB No. 10/216) .

Males ( FIgs 1–9 ). Total length: ca. 2.5–2.9 mm. Despite width of head is not properly measurable, head seems distinctly elongate, much longer than broad. Occipital margin straight, sides of head very feebly convex, occipital corners moderately rounded. Clypeus convex (seen in proFIle), its anterior margin narrowly rounded, but not prominent and not notched medially. Antennal sockets quite deep. Eyes rather big, their maximal diameter ca. 2.5 times smaller than length of head. Ocelli well developed, though not too big. Antennae 13-segmented, with 4-segmented club, scape relatively short, subequal to total length of 1st to 4th funicular segments. Mandibles not very long, elongate-triangular, with distinct masticatory margin, which is with only single sharp apical tooth. Palp formula seems 5, 3 (these characters are not proper visible, palp formula may be less, but deFInitely not more than 5, 3).

Scutum relatively short and high, strongly convex, Mayrian furrows well developed. Propodeum very low and quite long, lays much lower than dorsal levels of scutum and scutellum (shape of mesosoma similar to that of males of several Aphaenogaster species), its dorsal and posterior surfaces subequal in length, almost straight, meet at an rounded angle, without any denticles or tubercles (seen in proFIle). Propodeal lobes widely rounded.

Petiole remarkable, very long and low, without node, subcylindrical, slightly curved dorsoventrally. Postpetiole small, higher tan petiole, subglobular.

Legs long and slender. Mid and hind tibiae without spurs, pretarsal claws simple.

Head, mesosoma and waist FInely though densely punctated, mesopleuron and sides of propodeum additionally with FIne longitudinal striation. Gaster smooth and shiny.

Head, mesosoma and waist with dense, silverish decumbent pubescence. Head (including its ventral surface), scutum and propodeal dorsum with sparse long suberect hairs, gaster with more abundant similar hairs. Scape without hairs, femora and tibiae with non-abundant, FIne, fairly short semierect hairs, tarsi with short bristles.

Forewing with closed cells 1r+2r, rm and mcu, cell 3r open; cell 1r+2r quite big, ca. twice longer than width, cell rm pedicellate.

M e a s u r e m e n t s (in mm). H o l o t y p e: HL 0.53, SL 0.26, OL 0.22, PL 0.33, PH 0.078, PPL 0.20, PPH 0.14, ML 1.07, MH 0.65, HTL 0.65, total length ca. 2.9.

Ratios: SL/HL 0.49, OL/HL 0.42, PL / PH 4.17, PL /HL 0.61, PPL/PPH 1.36, PPL/HL 0.37, ML / MH 1.64.

Paratype: HL 0.44 SL 0.20, OL 0.18, PL 0.26, PH 0.077, PPL 0.14, PPH 0.10, ML 0.90, MH 0.50, HTL 0.50, total length ca. 2.5 .

Ratios: SL/HL 0.46, OL/HL 0.41, PL / PH 3.38, PL /HL 0.59, PPL/PPH 1.40, PPL/HL 0.32, ML / MH 1.80.

Workers and queens are unknown.

Figures

Fig. 1. Electromyrmex wheeleri sp. n., holotype male, body in lateral view (photo by E. Martynova).

Fig.2. Electromyrmex wheeleri sp. n., holotype male,head and antennae in lateral view (photo by E. Martynova).

Fig. 3. Electromyrmex wheeleri sp. n., paratype male, body in lateral view.

Fig. 4. Electromyrmex wheeleri sp. n., line drawing of holotype male based on photo, body in lateral view.

Fig. 5–7. Electromyrmex wheeleri sp. n., line drawings of holotype male made based on photos: 5 — head and antennae in lateral view, 6 — forewing, 7 — propodeum, waist and gaster in lateral view.

Fig. 8–9. Electromyrmex wheeleri sp. n., line drawings of paratype male made based on photos: 8 — body in lateral view, 9 — mandible.