Leuctra usdi Grubbs 2010

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 : 161-162

Leuctra usdi Grubbs 2010

Leipers Fork Needlefly

http://lsid.speciesfile.org/urn:lsid: Plecoptera .specie sfile.org:TaxonName:4322

( Figs. 43‒47 )

Leuctra usdi Grubbs 2010:59 . Holotype ♂ ( INHS), spring into Pinewood Branch, Leipers Fork of West Fork Harpeth River , 4 km W Leipers Fork, Williamson County, Tennessee

Male. The 7th abdominal dorsal process bears three lobes that terminate at the same plane; lateral lobes are small and directly somewhat diagonally; the medial lobe is subtruncate and ca. 4X the width of the lateral lobes ( Fig. 43 ). The specilla are broadest basally, scarcely recurved and slightly tapered anteriorly, and bear raised tubercles distally along the inner and outer margins ( Figs. 44‒47 ). The subanal lobes are recurved anteriorly, tapered distally, and ca. 80% the length of the specilla ( Fig. 46 ).

Material examined. USA, Alabama, Limestone Co., spring into unnamed tributary to Scarce Grease Branch , 2 km SE Lester, 34.9806, -87.1309, 18 February 2008, S.A. Grubbs, 2♂ (Paratypes, WKU) . Tennessee, Williamson Co., spring into Pinewood Branch, Leipers Fork , West Fork Harpeth River , 4 km W Leipers Fork, 35.8944, -87.0388, 5 March 2007, S.A. Grubbs, 3♂, 2♀ (Paratypes, WKU); same locality but 12 March 2015, S.A. Grubbs, 1♂ ( WKUC) .

Distribution. USA: AL, TN ( DeWalt et al. 2015).

Remarks. This species is still known only from three small spring runs, two in middle Tennessee and one in northern Alabama ( Grubbs 2010).

Figures

Figs. 43–47. Leuctra usdi, Tennessee, spring into Pinewood Branch. 43, 7th abdominal process, dorsal view, 350X; 44, paraprocts, caudal view, 500X; 45, paraprocts, caudal view, 2000X; 46, paraprocts, lateral view, 350X; 47, L. usdi, paraprocts, lateral view, 1500X. sp = specillum, sa = subanal lobe, ll = lateral lobe, ml = medial lobe.