Oropuella eidolon, Inc. & Road & Missoula & E-mail, 2020

Fasbender, Andrew, 2020, OROPUELLA, A NEW GENUS OF ORTHOCLADIINAE FROM THE WESTERN NEARCTIC Abstract, CHIRONOMUS Journal of Chironomidae Research 33, pp. 17-30 : 23-24

Oropuella eidolon new species

http://zoobank.org/ 00B5DC58-372D-4A9A-AB8C-D4B38DE2B5C9

Type material: Holotype male pupa (slide): USA. OREGON: Crater Lake National Park, Unnamed trib. to Vidae Creek , 42.8798°N, 122.0970°W, 6.viii.2018, NPS18CRLA004;ANSP-ENT-124822 [ ANSP] . Paratype 1 male pupa (slide): same data as holotype; ANSP-ENT-124823 [ ANSP] .

Etymology: Eidolon is Greek for a specter or phantom, a reference to the difficulty in establishing life stage associations within this genus. This epithet is treated as a noun in apposition.

Diagnostic characters: Adult male. Gonostylus with crista dorsalis triangular, large and protruding.

Pupa. Sternites V–VIII with posterior spinule band.

Description: Adult male (pharate). Figs 1a , 2a–c . Measurements (n = 2): flagellomeres (μm): 28–35, 20–34, 25–36, 27–34, 34–38, 36–43, 32–42, 34– 45, 42–49, 35–42, 40–44, 40–45, 126–155; AR 0.31–0.32; anal point 50–55 μm; gonocoxite 120– 124 μm; gonostylus 58–62 μm. Habitus brown, with lighter maculations around abdominal setae.

Genitalia. ~6 setae on each side of anal point. Lateral margin of gonocoxite straight; prominent triangular crista dorsalis extending nearly the entire length of the gonostylus, wider than remainder of gonostylus, apex of gonostylus with small subacute spine; megaseta adjactent and proximal to spine, small seta on dorsal surface distal to spine, three setae on carina on ventral surface of crista dorsalis. Sternapodeme smoothly arched; lateral apex of phallapodeme width subequal to medial portion.

Pupa. Figs 4a, c . Measurements (n = 2): length 2.7–2.8 mm. Sternites V–VIII with posterior spinule band.

Figures

Figure 1. Adult antennae. Male antennae: a) Oropuella eidolon n. sp.; b) Oropuella pallida n. sp. Female antennae: c) Oropuella sp. F1; d) Oropuella sp. F2; e) Oropuella sp. F3. a), b) and d) exhibit some foreshortening due to the position of the antenna on the specimen; setae omitted; scale bar = 100 μm.

Figure 2. Male genitalia. a–c Oropuella eidolon n. sp.: a) anal point and gonopods; b) left gonopod in dorsal view, right gonopod in ventral view; c) sternapodeme and phallapodemes. d–f) Oropuella pallida n. sp.: d) anal point and gonopods; e) left gonopod in dorsal view, right gonopod in ventral view; f) sternapodeme and phallapodemes. Only significant setae illustrated; scale bars = 100 μm.

Figure 4. Pupae. a) Oropuella eidolon n. sp. complete abdomen, dorsal view; b) Oropuella sp. F2 thoracic horn; c) Oropuella eidolon n. sp. apical abdominal segments, ventral view; d) Oropuella pallida n. sp. apical abdominal segments, ventral view; e) Oropuella sp. F1 apical abdominal segments, ventral view; f) Oropuella sp. F2 apical abdominal segments, ventral view; g) Oropuella sp. F3 apical abdominal segments, ventral view. Setae omitted except in 4a, setae D2–5 illustrated only on tergite V; scale bars = 100 μm.