Alloperla imbecilla
| Main Authors: | Stark, Bill P., Kondratieff, Boris C. |
|---|---|
| Format: | info publication-taxonomictreatment Journal |
| Terbitan: |
, 2010
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/4762935 |
Daftar Isi:
- Alloperla imbecilla (Say) (Fig. 16-20) Sialis imbecilla Say, 1823:165. Type material lost, neotype ♂ (United States National Museum), Ohio, Adams Co., Lower Twin Creek, Vastine Run, Designated by Baumann, 1974:258 Material examined. West Virginia: Wayne Co., tributary Millers Fork of Beech Fork, 15 May 1986, B.C. Kondratieff, 4 larvae (CSU). Mature larva. Body length 6.5-7.5 mm. General color brown without distinctive pattern. Anterior pronotal margin with 6-9 moderately thick setae at corners and posterior margin with a pair of long setae at corners (Fig. 16). Mesonotal wingpads with ca. 5-6 outer marginal setae, metanotal wingpads with ca. 7- 8 outer marginal setae beyond apex of mesonotal wingpad and 1 apparent inner marginal (Fig. 17). Mid and hindlegs each with a sparse ventral fringe of long silky setae, forelegs without ventral fringe (Fig. 19). Abdominal tergal fringes consist of stout setae with ca. 4-6 interspersed long thin setae; a few intercalary setae occur near lateral margins but none are located in median tergal field (Fig. 18). Cerci consisting of 14-15 apparent segments (Fig. 20), vertical fringe developed on segments 10-14, and a few fringe setae occur on segment 9; longest dorsal setae in segmental whorls of mid cercal segments about as long as segments. Comments. Stewart & Stark (2002) provide a detailed larval description for this species based on Pennsylvania specimens and indicate the cerci are "approximately 14-16 segmented". In our sample the apparent number of segments for three specimens was 14 but in one specimen a small fragment of segment 15 remained on the left cercus. The anterior pronotal setal count also varied in our sample for each specimen; the maximum number of anterior pronotal setae ranged from 6-9.
- Published as part of Stark, Bill P. & Kondratieff, Boris C., 2010, Larvae Of Eight Eastern Nearctic Alloperla Species (Plecoptera: Chloroperlidae), pp. 267-276 in Illiesia 6 (20) on pages 271-273, DOI: 10.5281/zenodo.4760034