Leuctra tenuis

Grubbs, Scott A., 2015, Leuctra Schusteri, A New Stonefly Species (Plecoptera: Leuctridae) Of The L. Tenuis (Pictet) Group From The Southeastern Usa, Illiesia 11 (12), pp. 147-166: 148-149

publication ID

http://doi.org/10.5281/zenodo.4752768

publication LSID

lsid:zoobank.org:pub:8BFBE3F7-E0EF-4EDD-BA82-9EA087F74688

DOI

http://doi.org/10.5281/zenodo.4752929

persistent identifier

http://treatment.plazi.org/id/03DD8784-FF99-A71A-FCB5-5F0F65E9FE67

treatment provided by

Felipe

scientific name

Leuctra tenuis
status

 

Key to males of the L. tenuis   species group

1 Dorsal process on 7 th abdominal tergum tapering to a single, narrowly-rounded posterior lobe, overall shape triangular ( Figs. 10 View Figs ‒11, 23‒25) ..……………….………...........…… 2

1’ Dorsal process on 7 th abdominal tergum narrowing little posteriorly, overall shape variable ( Figs. 1‒3 View Figs , 19, 34‒36 View Figs View Figs View Figs 4–9 View Figs View Figs View Figs View Figs View Figs , 43 View Figs , 48 View Figs ).……….… 3

2 Subanal lobe ca. ¾ length of the specillum ( Figs. 28‒30, 32 View Figs ); specillum simple, lacking spurs or tubercles distally ( Figs. 27 View Figs , 31, 33 View Figs ) ...…………………………...….… L. tenuis (Pictet)  

2’ Subanal lobe ca. equal length to specillum ( Figs. 14‒15 View Figs View Figs 4–9 View Figs ); specillum with a prominent, laterally-directed spur ( Figs. 12‒13 View Figs ) ………………………... L. schusteri   sp. n. Grubbs

3 Posterior margin of 7 th abdominal dorsal process terminating along the same plane, overall shape symmetrically-trapezoidal ( Figs. 43 View Figs , 48 View Figs ) .......................................…………………... 4

3’ Dorsal process on 7 th abdominal tergum variable, overall shape variable ( Figs. 1‒3 View Figs , 19, 34‒36 View Figs View Figs View Figs 4–9 View Figs View Figs View Figs View Figs View Figs ) ..…………………………………………… 5

4 7th abdominal dorsal process bearing three subtruncate lobes, lateral lobes small, medial lobe ca. 4X wider than lateral lobes ( Fig. 43 View Figs ); specillum bearing tubercles distally and along the outer distal margin ( Figs. 44‒47 View Figs View Figs 4–9 ); late winter and spring-emergent species ...... L. usdi Grubbs  

4’ 7th abdominal dorsal process lacking distinct lateral lobes, essentially straight along posterior margin ( Fig. 48 View Figs ); specillum lacking tubercles along distal outer margin and at the tips ( Figs. 49‒52 View Figs ); autumn-emergent species ……………………………... L. variabilis Hanson  

5 7th abdominal dorsal process bearing three rounded lobes, medial lobe narrowly-rounded posteriorly and nipple-like ( Figs. 34‒36 View Figs ); autumn- and winter-emergent species.……………………………..… L. triloba Claassen  

5’ 7th abdominal dorsal process lacking distinct lobes, medial posterior portion either broadlyrounded or subtriangular ( Figs. 1‒3 View Figs , 19 View Figs ); late spring- and summer-emergent species ….....… 6

6 7 th abdominal dorsal lobe broadly rounded posteriorly ( Figs. 1‒3 View Figs ); specillum subtriangular distally ( Figs. 4, 7, 9 View Figs 4–9 ), subanal lobes recurved anteriorly, but not at tip ( Figs. 4, 6, 9 View Figs 4–9 ) …………………...…….. L. carolinensis Claassen  

6’ 7 th abdominal dorsal process broadly subtriangular posteriorly ( Fig. 19 View Figs ); specillum truncate distally ( Fig. 22 View Figs ), subanal lobes sharply recurved anteriorly at tips ( Figs. 21‒22 View Figs ).……………………………….. L. tenella Claassen  

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Plecoptera

Family

Leuctridae

Genus

Leuctra