Lycoriella ampla, Menzel & Vilkamaa, 2021

Menzel, Frank & Vilkamaa, Pekka, 2021, New species and records of Lycoriella Frey (Diptera, Sciaridae) from the Holarctic region, Zootaxa 5072 (6), pp. 501-530 : 502-503

Lycoriella ampla sp. n.

Figs 1A , 3A , 12A

Material studied. Holotype male. CANADA, Ontario, 7 mi S of Griffith , 10.VII.1991, B.E. Cooper (in MZH, http://id.luomus.fi/GE.1808) . Paratype. CANADA, Ontario, Sudbury Co., Chapleau, Northeast Superior Forest, 47.573°N, 82.859°W, mature (99 years old) stand composed of 90% Pinus banksiana and 10% Picea mariana with understory shrub layer of Vaccinium , very wet with considerable bryophyte coverage, Pinus banksiana log, photoeclector, 22. VII.2013, R. Deady, 1 male (in SDEI) .

Description. Male. Head. Face and antenna concolorous pale brown, maxillary palpus pale brown. Eye bridge 2 facets wide. Face with 11 setae. Clypeus with 1 seta. Maxillary palpus with 3 segments, 1 st segment longer than 3 rd segment, 2 nd segment shortest; 1 st segment with 3 setae, with large dorsal pit with sensilla; surface of antennal flagellomeres smooth, body of 4 th antennal flagellomere 2.8x as long as wide, neck slightly longer than wide, longest setae longer than width of flagellomere. Thorax. Brown; setae pale. Anterior pronotum with 2 setae. Proepisternum with 5 setae. Scutellum with 2 long, 2 moderately long and some short and fine setae. Wing. Hyaline. Length 2.1–2.2 mm. Width/length 0.45. Anal lobe small. Veins distinct, except for stM. c/w 0.60. R1/R 0.60. stM longer than fork of M. bM shorter than r-m, stCuA shortest. bM and r-m non-setose. Halters of the studied specimen missing. Legs. Pale brown; setae pale. Fore tibial organ forming small patch of some setae in demarcated depression. Fore tibial spur shorter than apical width of tibia. Abdomen. Pale brown; setae pale, short and fine. Hypopygium ( Fig. 1A ). Brown, like abdomen. Intergonocoxal area moderately long, with 2 indistinct lobes each with 4 long setae. Gonocoxa broad, longer than gonostylus, with sparse and fine setosity. Gonostylus ( Fig. 3A ) wide, roundish laterally, convex medially, slightly narrowed apically; with short and dense setosity apically, with straight and conical apical tooth, with 1 megaseta on apical, 1 on dorsal, 1 on ventral side of apical tooth, with 3 subapical megasetae very near apical tooth; slightly differentiated whip-lash seta on apical quarter of gonostylus. Tegmen ( Fig. 12A ) slightly shorter than wide, roundish and membraneous apically, straight and strongly sclerotized laterally, with long apodemes, and a large area of aedeagal teeth. Aedeagal apodeme rather short.

BIN. Unknown.

Discussion. Lycoriella ampla sp. n. has long antennae, a narrow eye bridge with one or two rows of facets, an extremely short maxillary palpus with a strongly deepened sensory pit (2 nd and 3 rd palpal segments are short and oval and together as long as 1 st segment), basally narrowed wings, a very short wing vein R1, and a small demarcated fore tibial organ. The intergonocoxal area has apically two small groups of only four or five closely placed setae, the medial side of the gonostylus is straight, with a relatively short whip-lash seta on its apical half, and a slender apical megaseta. These characters are shared with Lycoriella micria Mohrig & Menzel, 1990 . Lycoriella ampla differs from L. micria in having longer antennal flagellomeres, a strongly widened gonocoxa and gonostylus, apically roundish tegmen with straight sclerotized lateral sides, a nearly straight apical tooth, and a higher number of apical-subapical gonostylar megasetae (see the description). Lycoriella micria has a narrower gonocoxa and gonostylus with more widely placed and stronger subapical megasetae, a wider and straighter apex of the tegmen, more indistinct groups of setae in the intergonocoxal area, and a more strongly curved apical tooth of the gonostylus with only one apical and three to four subapical megasetae. The extremely voluminous gonostylus of L. ampla , with its extremely widened lateral side, resembles that of Bradysiopsis vittigera ( Zetterstedt, 1851) and the unusually sclerotized lateral sides of its tegmen, unknown in any other known species of Lycoriella , resemble those of Hemineurina riparia ( Holmgren, 1883) [see Figs 159 and 374 in Menzel & Mohrig (2000)].

Etymology. The name is Latin, ampla , widened, referring to the widened gonostylus of the male hypopygium.

Figures

FIGURE 1. Hypopygium, ventral. A. Lycoriella ampla sp. n. (holotype). B. L. barkalovi sp. n. (holotype). Scale 0.1 mm.

FIGURE 3. Gonostylus, ventral. A. Lycoriella ampla sp. n. (holotype). B. L. barkalovi sp. n. C. L. canningsi sp. n. (holotype). D. L. excavata sp. n. (holotype). Scale 0.1 mm.

FIGURE 12. Tegmen, ventral. A. Lycoriella ampla sp. n. (holotype). B. L. excavata sp. n. (holotype). Scale 0.1 mm.