Isoperla umpqua Szczytko & Stewart, 2013

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 : 57-59

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.4764099

persistent identifier

https://treatment.plazi.org/id/1B32387A-8300-B261-F6A0-A107FEBFA02C

treatment provided by

Felipe

scientific name

Isoperla umpqua Szczytko & Stewart
status

 

Isoperla umpqua Szczytko & Stewart

( Figs. 18 View Figs a-d)

Isoperla muir Szczytko & Stewart 2004 . Nomen nudum.

Isoperla umpqua Szczytko & Stewart 2013 . View Cited Treatment Holotype ♂, Oregon, Douglas County, Muir Creek, Hwy 230, downstream from bridge .

Male. Aedeagus: sclerotized posterior process present; body with one large dorsoanterior lobe ( Fig. 18a View Figs ); sclerotized process length approximately 0.5 mm, recurved and rod-like, with parallel lateral margins, apex clavate, and distal margin rounded in lateral and posterior views ( Figs. 18 View Figs a-c). Mesoposterior area of eighth and ninth terga with bipartite patches of short stout spinulae and long fine scattered setae ( Fig. 18c View Figs ). 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 combined first and second cercal segments, tapering gradually to long blunt apices ( Fig. 18c View Figs ). Vesicle: pedunculate, length subequal to width, constricted near base with curved lateral margins, wider and rounded at apex ( Fig. 18d View Figs ).

Based upon the presence of a sclerotized posterior process, absence of distinct aedeagal spinule patches, and pedunculate vesicle shape, I. umpqua is placed within the I. sordida complex ( Table 1 View Table 1 ). It differs from all other I. sordida complex species by possessing short stout spinulae arranged in bipartite patches along mesoposterior margins of terga 8-9. The clavate sclerotized posterior process is most similar to I. adunca ; however its length is approximately twice as long as I. umpqua . Isoperla umpqua is known only from Oregon, and similar to I. baumanni , is from a single location.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Plecoptera

Family

Perlodidae

Genus

Isoperla

Loc

Isoperla umpqua Szczytko & Stewart

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

Isoperla umpqua

Szczytko & Stewart 2013: 57
2013
Loc

Isoperla muir

Szczytko & Stewart 2004: 57
2004