Alloperla usa Ricker

Stark, Bill P. & Kondratieff, Boris C., 2010, Larvae Of Eight Eastern Nearctic Alloperla Species (Plecoptera: Chloroperlidae), Illiesia 6 (20), pp. 267-276: 274

publication ID

http://doi.org/10.5281/zenodo.4760034

DOI

http://doi.org/10.5281/zenodo.4759850

persistent identifier

http://treatment.plazi.org/id/03E487CA-FF97-4321-B815-7AE349D0F5AC

treatment provided by

Felipe

scientific name

Alloperla usa Ricker
status

 

Alloperla usa Ricker  

( Figs. 21-25 View Figs )

Alloperla usa Ricker, 1952:178   .

Holotype ♂ (Illinois Natural History Survey), Tennessee, Sevier Co., Little Pigeon River near Alum Cave Creek, Great Smoky Mountains National Park  

Material examined. North Carolina: Burke Co., Jacob’s Fork, Old NC Hwy 18, South of Pleasantford , 35.59° N, 81.57° W, 3 May 2005, B.C. Kondratieff, R.F. Kirchner, R.E. Zuellig , D. R. Lenat , 1 pharate male larva ( CSU) GoogleMaps   .

Mature larva. Body length 9.0 mm. General color brown without distinctive pattern. Head slightly darker over ocelli and pale forward of median ocellus ( Fig. 21 View Figs ). Anterolateral margin of head somewhat angulate and slanted from near antennal base to labrum. Anterior pronotal margin with ca. 5-6 moderately thick setae on corners and 2 long thin setae on posterior corners ( Fig. 21 View Figs ). Mesonotal and metanotal wingpads without obvious outer or inner marginal setae but short, thick basal setae abundant on both segments, extending slightly beyond mesonotal wingpad on surface of metanotal wingpad ( Fig. 22 View Figs ). Ventral tibial fringes and dorsal femoral fringes apparently absent on all legs; dorsal tibial fringes sparse ( Fig. 24 View Figs ). Abdominal terga without pale spots; posterior fringe reduced to a few short thick setae near lateral margins and several (ca. 6) long thin setae; intercalary setae restricted to areas near lateral margins ( Fig. 23 View Figs ). Cerci with 18 apparent segments ( Fig. 25 View Figs ), vertical fringe sparse and restricted to segments 11-16, primarily on ventral side; a few scattered dorsal fringe setae occur on segments 13-15.

Comments. Larvae of A. usa   may have been incorrectly identified as a possible southeastern species of Utaperla   in the past due to the slightly elongated head and the poorly developed cercal fringe. Mature larvae however are more robust than those of Utaperla   and the two can be readily separated by the pronotal setation which consists of numerous long setae on both the anterior and posterior margin in species of that genus ( Stewart & Stark 2002).

CSU

CSU

R

Departamento de Geologia, Universidad de Chile

CSU

Colorado State University

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Plecoptera

Family

Chloroperlidae

Genus

Alloperla

Loc

Alloperla usa Ricker

Stark, Bill P. & Kondratieff, Boris C. 2010
2010
Loc

Alloperla usa

Ricker, W. E. 1952: 178
1952