Barynema dilatum, Wells & St Clair, 2021

Wells, Alice & St Clair, Rosalind, 2021, Review of the Australian endemic odontocerid genus Barynema and status of Australian Marilia (Trichoptera), Memoirs of Museum Victoria 80, pp. 101-112 : 109

Barynema dilatum sp. nov.

http://zoobank.org/urn:lsid:zoobank.org:act:26539E9C-AFA3- 4F1B-BD16-B4C2F76A38E8

Figures 21–24

Material examined. Holotype. male, north Queensland, Carron Creek, Kirrama State Forest , April 1993, G. Theischinger, 18° 06'S 145° 41' E ( NMV WTH-2966 PT-2033).

Paratypes. North Queensland : 5 males, Carron Creek, Kirrama State For. , 17° 50' S 145° 35' E, April 1993 ( NMV WTH-1171 ) ; 5 males, same data ( NMV WTH-1174 ) ; 5 males, same data ( NMV WTH-1172 ) ; 5 males, same data ( NMV WTH-1173 ) ; 5 males, same data ( NMV WTH-1174 ) ; 5 males, same data ( NMV WTH-1175 ) ; 5 males, same data ( NMV WTH-1176 ) ; 3 males, same data ( NMV WTH-1345 ) ; 7 males, north Queensland, Goodard Creek, Kirrama State Forest , April 1993, G. Theischinger, 18° 06' S 145° 41' E ( NMV WTH-1040 ) ; 7 males, same data ( NMV WTH-1041 ) ; 17 males, 6 females, stream on Tully Gorge Road, 6.7 km d’s of power station, M. Shackleton and J. Mynott , 8.v.2011 ( NMV Tri-54556) .

Other material. North Queensland: 3 females, upper Mulgrave River via Gordonvale, 29–30 April 1970, S.R. Curtis ( NMV WTH-0786 ) ; 5 male, same data ( WTH-2654 ) ; 1 female, Lock-Davies Creek Road, Lamb Range, Mareeba District, 10 November 1974, M.S. Moulds ( WTH-0437 PT-2028) ; 1 female, upper Freshwater Creek , Whitfield Range, Cairns, 24 August 1974, MV-light, MS Moulds ( WTH-0615 ) ; 1 male, same data ( NMV WTH-0603 ) ; 1 male, same data ( NMV WTH-0604 ) ; 1 male, upper Freshwater Creek , Whitfield Range, near Cairns, 15 December 1974, MS Moulds ( NMV WTH-0606 ) ; 1 male, 1 male, same data ( NMV WTH-0605 ) ; 1 male, same data ( NMV WTH-0607 ) ; 2 females, same data ( NMV WTH-0614 ) ; 1 male, the Crater , near Herberton, 18 December 1974, M.S. Moulds ( NMV WTH-0602 ) ; 1 female, Mareeba , Davies Creek Road, 21 January 1976, Walford-Huggins ( NMV WTH-0616 ) ; 1 male, State Forest , 24 km along Goldsborough Road near Gordonvale, 27.xii.1980, M.S. and B.J. Moulds ( NMV WTH-1350 ) ; 1 male, Behana Gorge , Cairns, 16 November 1982, T. Hinger, 17° 11' S 145° 50' E ( NMV WTH-0608 ) ; 2 females, same data ( NMV WTH-0609 ) ; 1 male, Mossman Gorge , Daintree National Park, 17 November 1988, MV lt, K. Walker ( NMV WTH-0598 ) ; 1 male, river on Lake Morris Road , Cairns, 3.v.2011, 16.9412 145.71762 ( NMV EPAVT122 ) ; 2 males, 5 females, river on Lake Morris Road , Cairns, 16.9412 145.71762, 3.v.2011, J. Mynott and M. Shackleton ( NMV Tri-54557) ; 1 male, small creek beside Josephine Falls , M. Shackleton and J. Mynott, 6.v.2011 ( NMV Tri-54559) ; 1 male, 1 female, Josephine Falls , 17.4338 145.8630, Shackleton and Mynott 110506-7, 6.v.2011 ( NMV Tri-54558) ; 3 males, Dunn ? Creek at Bridge 11, Kirrama Range Rd, ~ 14 km from national park sign, − 18.2138 S 145.7982 E, 24.x.2017, D. Cartwright and R. St Clair ; 1 male, Mulgrave Road , Goldsborough Valley Campsite, Wooroornoonan National Park, 17.2374 S 145.7733 E, 26.x.2017 ( NMV JOS 451 ) ; 1 male, Python Creek in Tully Gorge Road , ~ 52 km NW of Tully, 17.7662S 145.5895E, 2 November 2017, D. Cartwright and R. St Clair ( QM JOS-448) .

Diagnosis. The male of Barynema dilatum closely resembles that of B. dolabratum sp. nov. in having the inferior appendages each with the harpago reduced to a small apically setose ventral lobe and the coxopodite in lateral view produced and curved ventrad distally. In B. dolabratum , the upper penis cover in ventral view appears to form two lobes apically, with the ventral lobe expanded and rounded laterally, in contrast with B. dolabratum , which has the upper penis cover in ventral view pick-shaped apically.

Description. Mesothorax with mesoscutellum shield-shaped, without setate warts; fresh adult males with body and wings dark except white area at anastomosis on wings.

Male. Length of each forewing 9.3–10.3 mm (n = 10). Sternite VII without median tab or spur. Genitalia: Pre-anal appendages in dorsal view broadest at about midpoint, constricted towards base. Upper penis cover distally bilobed, dorsal lobe tapered apically in ventral view, rounded in lateral view, ventral lobe expanded and rounded laterally towards apex. Inferior appendages each with coxopodite base short, stout, produced to form a dorsal lobe with slender neck before slightly dilated apex bearing short stubby black setae, harpago short, rod-shaped, bearing dense brush of short black setae apically.

Female. Length of each forewing 11.8–17.7 mm (n = 10). Terminalia: Apical lobes conical, tapered to darkly sclerotised apices.

Distribution. From north-eastern Queensland, west of Tully to the Cairns district.

Etymology. The name is derived from the Latin dilato, to extend, for the lateral swellings on the upper penis cover lobes.