Syntemna Winnertz, 1863

Syntemna Winnertz, 1863: 767 .

DIAGNOSIS: Mediotergite bare; laterotergites setose; wing membrane with macrotrichia; Sc meets R; radial cell very small, subquadrate; base of M 3+4 and CuA fork proximal to base of M 1 and M 2 fork; segment 7 of abdomen reduced.

TYPE SPECIES: S. morosa Winnertz, 1863: 767, by monotypy.

COMMENTS: About 20 extant species are known from the Holarctic (Zaitzev, 1994), with an additional 12 species described from Baltic amber (Meunier, 1904, 1917a, 1922) and 4 from the Lower and Upper Cretaceous of northeast Asia (Blagoderov, 1995, 1998a, 2000).

Syntemna fissurata, new species

Figures 39, 40, Plate 4C

DIAGNOSIS: Sc ends at R at the base of RS; R 4 present; crossvein r­m 0.5Χ length of M3 section; base of fork of M 3+4 and CuA proximal to the base of M 1 and M 2 fork.

DESCRIPTION: Body length = 3.06 mm, wing length = 2.28 mm. Head not fully visible. Flagellum 14­segmented, flagellomeres barrel­shaped, length of each 1.5Χ the width, setose, length of setae about equal to flagellomere width. Thorax: Scutum with strong, long setae in lateral, dorsocentral, and acrostichal rows, with short setulae. Antepronotum, proepisternum, laterotergites, and me­ diotergite setose. Wing membrane with microtrichia and short macrotrichia. Costa ends beyond the tip of R 5, one­fourth distance between tips of R 5 and M 1. Sc meets R just before base of RS. Sections of RS1 and RS2 equal and 1.5Χ length of r­m. Crossvein r­m 0.5Χ length of M3 section. Fork of M 1 and M 2 3.5Χ length of its stem (M3). Base of fork of M 3+4 and CuA proximal to the base of M2 section. Legs: Inner surface of mid tibia with fissurelike sensory pit in apical third. Tarsal claws with two short teeth at the base. Abdomen setose, with 7 visible segments, 7th one very small. Cerci 2­segment­ ed, basal segment roundish, with numerous long trichia; apical segment bacilliform, with length twice the width, bare. Lateral lobes of 8th sternite setulose.

MATERIAL: Holotype TMPD P83.15.3.8, female. Canada: Alberta, Grassy Lake, coll. T. Pike

ETYMOLOGY: The species epithet is the Latin word fissures, meaning ‘‘full of cracks’’, in reference to the state of preservation of the specimen.

COMMENTS: The new species differs from all other known Mesozoic species in having section M3 long, at least twice the length of crossvein r­m.