Isoperla tilasqua Szczytko & Stewart, 1979

Sandberg, John B. & Kondratieff, Boris C., 2013, The Isoperla Of California (Plecoptera: Perlodidae); Updated Male Descriptions And Adult Keys For 18 Western Nearctic Species, Illiesia 9 (5), pp. 34-64 : 57

publication ID

https://doi.org/10.5281/zenodo.4760870

publication LSID

lsid:zoobank.org:pub:150B2555-91E3-4110-8BBC-25F1AAC0E6B2

DOI

https://doi.org/10.5281/zenodo.4760401

persistent identifier

https://treatment.plazi.org/id/1B32387A-8300-B26F-F438-A1D7FC0AA188

treatment provided by

Felipe

scientific name

Isoperla tilasqua Szczytko & Stewart
status

 

Isoperla tilasqua Szczytko & Stewart

( Figs. 17 View Figs a-d, 20f)

Isoperla tilasqua Szczytko & Stewart 1979 .

Holotype ♂, Oregon, Benton County, Oak Creek.

Male. Aedeagus: sclerotized posterior process absent; body with two large posterior lobes and expanded apex, apex deeply inverted, with a pair of small conical lobes at apicolateral margins ( Fig. 17a View Figs ); one large patch of spinulae concentrated below posteromedian lobe ( Fig. 17b View Figs ), and a long thin patch along posteroapical margin ( Fig. 17c View Figs ). Abdominal terga 8-9, 9, 9-10: without stout spinulae or long stout setae. Posterolateral margins of at least abdominal segment 8 with scale-like setae clustered in brushes of several setae. Paraprocts: curved dorsally, length if straightened subequal to first cercal segment, tapering abruptly to blunt apices ( Fig. 17c View Figs ). Vesicle: rounded lobe, widest at base with broadly rounded apical margin ( Fig. 17d View Figs ).

Isoperla tilasqua is not known from California, recorded from Oregon and Washington ( Szczytko & Stewart 1979, Sandberg 2011b) and is most similar to I. baumanni . See comments under I. baumanni .

After live eversion, the extended tube-like lobes described in Szczytko & Stewart (1979, fig. 116) remained inverted, their locations could be identified by small inverted membrane areas (openings). After clearing in KOH, a pair of tube-like internal processes was discernible within the body of the aedeagus, with openings along the anteroapical margin ( Fig. 20f View Figs ).

Additional Material Examined. OREGON, Harney Co., Trout Creek, NFD 395 Rd 4.25 mi (6.8 km) E Idlewild CG ( Hwy 395), 43.80484°N, 118.91082°W, 21/ V /2013, J.B. Sandberg, B.C. Kondratieff, 4 Larvae, 2♂, 3♀ (reared) ( JBSC); GoogleMaps Umatilla Co., Camas Creek, Hwy 395 Ukiah-Dale Forest State Park 1.1 mi (1.8 km) S Hwy 244 intersec, 45.1241°N, 118.97251°W, 22/ V /2013, J.B. Sandberg, B.C. Kondratieff, 2♂, 1♀ ( JBSC). GoogleMaps

CG

Embrapa Collection of Fungi of Invertebrates

V

Royal British Columbia Museum - Herbarium

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Plecoptera

Family

Perlodidae

Genus

Isoperla

Loc

Isoperla tilasqua Szczytko & Stewart

Sandberg, John B. & Kondratieff, Boris C. 2013
2013
Loc

Isoperla tilasqua

Szczytko & Stewart 1979: 57
1979