Perlomyia excavata, Sivec & Stark, 2012

Sivec, Ignac & Stark, Bill P., 2012, The Genus Perlomyia Banks In Taiwan (Plecoptera: Leuctridae), Illiesia 8 (11), pp. 119-124 : 122

publication ID

https://doi.org/ 10.5281/zenodo.4760611

DOI

https://doi.org/10.5281/zenodo.4763766

persistent identifier

https://treatment.plazi.org/id/03B77C31-FFFA-8F4A-8565-3BEC1EBD39C0

treatment provided by

Felipe

scientific name

Perlomyia excavata
status

sp. nov.

Perlomyia excavata View in CoL sp. n.

( Figs. 5-8 View Figs )

Material examined. Holotype ♂, paratypes 4♂, Taiwan: Kaohsiung County, E Tientzu, 2400 m, 23°15’24’’N, 120°54’51’’E, 29 March1996, I. Sivec, B. Horvat, ( PMSL). GoogleMaps Additional paratypes: Taiwan: Hualien County, Tzuen, Taroko National Park, 1890 m, 24°11’35’’N, 121°23’43’’E, 13 April 1996, I. Sivec, B. Horvat, 1♀ ( PMSL). GoogleMaps Kaohsiung County, E Tientzu, 2450 m, 23°15’15’’N, 120°55’52’’E, 30 March 1996, I. Sivec, B. Horvat, 2♂, 2♀ ( PMSL); GoogleMaps E Tientzu, 2450- 2500 m, 23°15’25’’N, 120°54’42’’E, 23 October 1996, I. Sivec, 4♂, 1♀ ( PMSL), 2♂, 1♀ ( BPS); GoogleMaps Hsinan shan, 2200 m, 23°04’24’’N, 120°50’28’’E, 31 March 1996, I. Sivec, B. Horvat, 1♀ ( PMSL). GoogleMaps Taichung County, Wulin, Sheipa National Park , 1820 m, 24°22’56’’N, 121°18’43’’E, 28 October1996, I. Sivec, 2♂, 2♀ ( PMSL). GoogleMaps Taitung County, W Hsiangyang, 2580 m, 23°15’48’’N, 120°59’27’’E, 30 March 1996, I. Sivec, B. Horvat, 1♀ ( PMSL). GoogleMaps

Adult habitus. General color dark brown to black, typical of genus.

Male. Forewing length 7 mm. Epiproct long, slender in dorsal aspect and hook shaped in lateral aspect ( Figs. 5, 7 View Figs ). Tergum 9 notched along posterior margin, forming a prominent U-shaped cleft which extends nearly to the anterior margin of the segment; posterolateral margins of notch produced into slender finger-shaped processes. Small knobs absent from tergum 10. Cerci bearing a prominent basal lobe with rounded distal margin visible in dorsal aspect, and a small subapical spine. Paraprocts fused into a broad, thick process bearing a slender, retractable, sclerotized rod ( Fig. 7 View Figs ). Apex of sternum 9 produced into a triangular, upwardly curved structure ( Figs. 6- 7 View Figs ). Vesicle longer than wide ( Fig. 6 View Figs ).

Female. Forewing length 8 mm. Sternum 7 produced into a rounded plate which overlaps the base of sternum 8 ( Fig. 8 View Figs ). Mesal, rectangular sclerites of sternum 8 narrowly divided by membrane; mesal sclerites extend slightly beyond base of sternum 9; lateral wing-like sclerites somewhat foot shaped and attached to anterolateral margins of mesal sclerites.

Larva. Undescribed.

Etymology. The species name refers to the U-shaped, excavated area of tergum 9 of the male.

Diagnosis. This is the only known Perlomyia species in which the male 9 th tergum exhibits a U-shaped cleft, similar to that found in males of the eastern Nearctic genus Zealeuctra ( Ricker & Ross 1969) . A similar structure also occurs on tergum 7 for Leuctra fusca (Linnaeus) ( Zhiltzova 2003a) . As noted above the female is similar to P. angulata among Taiwanese species, but is distinguished by the location of the attachment points between sclerites on sternum 8.

PMSL

Slovenian Museum of Natural History (Prirodosloveni Muzej Slovenije)

BPS

California Department of Food and Agriculture

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Plecoptera

Family

Leuctridae

Genus

Perlomyia

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