Helius gedanicus Kania, 2014, sp. nov.
Creators: name: Kania, Iwona
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Limoniidae
Helius
Helius gedanicus

description: Helius gedanicus sp. nov.
(Figs 4 A–B)
Material examined. Holotype: No. 4073 (female) (SNMG).
Etymology. From Latin Gedanum, Gdańsk. The species epithet is a noun.
Diagnosis. Rostrum approximately twice as long as the head, longer than palpus, shorter than antenna; antenna only 1.2x the length of the rostrum, palpus almost half the length of the rostrum; last palpal segment shorter than two penultimate.
Description. Body: the length of specimen 4.76 mm.
Head (Fig. 4 A): rostrum 0.75 mm long, 0.10 mm wide, twice as long as the head; antenna 0.98 mm, 16- segmented, short, approximately 1.2x length of the rostrum (Fig. 4 B); scape cylindrical, large; pedicel large, its distal part conspicuously widened; first flagellomere large and barrel-shaped, flagellomeres 2–6 barrel-shaped, rather short, flagellomeres 7-15 cylindrical, slightly elongated, the last segment of antennae narrowed, shorter than penultimate one, approximately half its length; flagellomeres with four elongated setae, which are longer than the length of flagellomeres bearing them.
Palpus (Fig. 4 A): the basal three palpal segments of the same length, 0.09 mm; the last one relatively short, 0.11 mm.
Wing not preserved.
Ovipositor elongated.
Remarks. The species differ distinctly by the ratio of the lengths of palpus, antenna, rostrum and head from the other species from Baltic amber.
Helius hoffeinsorum sp. nov. (Figs 5 A–D)
Material examined. Holotype: No. 1462 (male) Coll. Ch. and H. W. Hoffeins (SDEI).
Etymology. A new species is dedicated to Christel and Hans Werner Hoffeins from Hamburg, Germany, the owners of amber inclusions collection and the experts in Baltic amber inclusions.
Diagnosis. Rostrum shorter than twice the head length, longer than palpus, slightly shorter than antenna; palpus longer than half the length of the rostrum and antenna; the last palpal segment shorter than all the preceding taken together, only slightly longer than penultimate one; vein r-m rather long, well expressed.
Description. Body (Fig. 10 A): the length of specimens 5.63 mm.
Head (Fig. 5 B): rostrum 0.91 mm, shorter than 2x head length; the length of antenna 1.06 mm, 16-segmented, not very elongated, slightly longer than the rostrum (Fig. 5 C); scape cylindrical, large; pedicel large, its distal part conspicuously widened; first flagellomere barrel-shaped, flagellomeres 2–5 oval, rather short, flagellomeres 6–10 cylindrical, elongated, dainty, of equal length; the last segment the same length as penultimate one; flagellomeres with one elongated setae, longer than the length of segments bearing them.
Palpus (Fig. 5 B): 0.49 mm; the length of last palpal segment 0.15 mm, penultimate 0.14 mm, first and the second segments 0.10 mm; the last palpal segment shorter than all the preceding taken together, only slightly longer than penultimate one.
Wing (Fig. 5 D): partly preserved; 2.18 mm wide; vein Sc elongated, ending opposite 3/4 the length of Rs, r-r (R2) atrophied; A2 elongated, slightly subsinuous.
Hypopygium (Figs. 5 B, 11C): 0.32 mm long; gonocoxite elongated and rather narrow; inner and outer gonostylus longer than half the length of gonocoxite; inner gonostylus longer and much wider than outer gonstylus, lobe-shaped, narrowed in the distal part, distinctly wider at the base and in the middle, curved at the end, with additional tubercles and setae at the inner edge of the middle part; outer gonostylus narrow, straight, only slightly wider at the base.
Remarks. The species characterized by moderately elongated rostrum like H. linus, H. pulcher and H. formosus but is the most similar to the last one. In contrast to H. formosus in H. hoffeinsorum the last palpal segment is distinctly shorter, only slightly longer than penultimate one, in H. formosus it is 1.25x the length of all the preceding taken together.
description: Published as part of Kania, Iwona, 2014, Subfamily Limoniinae Speiser, 1909 (Diptera, Limoniidae) from Baltic amber (Eocene): the genus Helius Lepeletier & Serville, 1828, pp. 333-352 in Zootaxa 3814 (3) on pages 338-339, DOI: 10.11646/zootaxa.3814.3.2, http://zenodo.org/record/231107