Corresponding author: Ernst Heiss (
Academic editor: Sonja Wedmann
The present paper is a continuation of previous contributions describing fossil
Baltic Amber, a fossilized tree resin found on or near the shores of the eastern Baltic Sea, represents the largest deposit of amber in the world. It is exceptionally rich in well-preserved inclusions of botanical and zoological objects, particularly arthropods. The origin, genesis, properties, age and the flora and fauna of Baltic Amber are largely discussed by
Among the insect fauna,
Records of the flat bug family
To date 14 species of the genus
Another species,
The Amber inclusion used in this study is preserved in the collection of the author at the Tiroler Landesmuseum, Innsbruck, Austria.
Photos were taken through an Olympus SZX 10 binocular microscope with Olympus E 3 digital camera and processed with Helicon Focus 4.3 software, using Adobe Photoshop and Lightroom 2.3.
Measurements were taken with a micrometer eyepiece, 20 units = 1 mm, and are given in millimetres, unless otherwise stated.
Holotype female in a honey-coloured transparent piece of Baltic Amber, which will be embedded in a block of epoxid resin (He-BB-Ar-40).
The specimen is dorsally and ventrally clearly visible, without a frequently occurring white incrustation (German: Verlumung). Antennae and legs are complete, the latter are bent ventrally.
Species of larger size (9.2 mm) with long antennae, which are beset with tubercles bearing stiff bristles. Lateral margins of pronotum angulate and serrate, constricted anterolaterally. Abdomen widely rounded, connecting vein M-Cu of corium situated posterior to A-Cu.
Macropterous female. Body with fine granulation. Colour light brown with darker patches on head, pronotum and hemelytra.
Head. Wider across eyes than long (32 / 29). Clypeus subparallel, twice as long as antennal segment I, apex rounded. Antenniferous tubercles subparallel, acute, shorter than antennal segment I. Lateral margins begranulate, a distinct preocular tubercle present. Antennae slender, 1.72 × as long as width of head; antennal segment I short but widest, here secondarily depressed; II longest, thinner at middle than at its ends; III shorter than II tapering toward base; IV shortest with pilose apex. Relative length of antennal segments I / II / III / IV = 6 / 23 / 17 / 11. Eyes reniform, large, protruding laterally. Postocular lobes rounded, their margins beset with some larger tubercles. Vertex with U-shaped depression. Rostrum arising from an open atrium, four-segmented, reaching anterior 1/3 of prosternum.
Pronotum. 2.56 × as wide as long (64 / 25). Lateral margins irregularly serrate, angularly expanded at middle then strongly converging and constricted anteriorly. Anterolateral angles rectangular, anterior margin straight. Surface only slightly convex, with 4 longitudinal carinae, the median ones of full length, the lateral ones shorter, reaching to shallow transverse impressions. Humeral angles slightly carinate. Posterior margin concave at middle, rounded laterally.
Scutellum. Triangular, 1.60 × as long as wide at base (40 / 25). Lateral margins straight and carinate, apex narrowly rounded. Disk elevated at basal 1/3, surface granulate.
Hemelytra. Basal lateral expansion of corium rounded; posterior angle of corium reaching posterior margin of dorsal external laterotergite (deltg) V. Veins distinct, M-Cu situated posterior to A-Cu. Membrane with 4 distinct veins, reaching to anterior margin of tergit VII, surface wrinkled.
Abdomen. Widely rounded; lateral margins of deltg II-VI slightly convex posteroexterior angles not produced; deltg VII broadly rounded posteriorly, paratergites VIII cleft at middle, apex rounded with a blunt lateral tooth. Ventral side with a longitudinal groove, reaching from sternite VIII to prosternum. Spiracles II-VII ventral and far from lateral margin, VIII lateral and visible from above.
Legs. Femora fusiform, trochanters fused along visible sutures. Tibiae cylindrical, slender, protibial comb present. Tarsi two segmented with slender curved claws lacking pulvilli.
Measurements. Length 9.2 mm; length of antennae 2.25 mm; width of abdomen 5.05 mm; width of corium 3.75 mm; width of tergite VIII 1.7 mm.
The epithet refers to its unusual large size, from “macros” <Greek> large and “soma” <Greek> body.
The new species can be distinguished at once from all other species of
I am grateful to Marius Veta (Palanga, Lithuania) who provided the Amber inclusion, Stefan Heim (Tiroler Landesmuseum) for the photos and Dominique Zimmermann, the newly appointed editor-in-chief for the Deutsche Entomologische Zeitschrift, who invited me to contribute to this issue and the reviewers for their critical reading and suggestions.