Zelandobius crawfordi, McLellan, 2008

McLellan, Ian D., 2008, Additions To Zelandobius (Plecoptera: Gripopterygidae Antarctoperlinae) From New Zealand, Illiesia 4 (2), pp. 11-18 : 14-15

Zelandobius crawfordi sp. n.

( Figs. 10-13 )

Material examined. Holotype ♂, NZCO, Pigroot Ck , 520 m, 8 Sept 1993, B. H. Patrick ( NZAC); paratype ♀, NZCO, Pigroot Ck , 500 m, 12 Oct 1994, B. H. Patrick ( NZAC); 2 paratype ♂, NZCO, Pigroot Ck , 520 m, 8 Sept 1993, B. H. Patrick ( Central Stories Museum & Art Gallery, Alexandra , New Zealand); 1♂, NZCO, Shag River headwaters, 570 m, 10 Sept 1993, B. H. Patrick; 2♂, NZCO, Umbrella Mts, 360 m, trib Pomahaka River, 23 Sept 1993, H. Patrick; 1♂, NZCO, West Eweburn , Ida Range, 1100-1250 m, 25 Sept 1996, B. H. Patrick .

Dimensions.

Male: Body length 7-7.5 mm; antenna 6 mm; forewing 7-7.5 mm; hind leg 5.5 mm; pronotum length 0.8 mm, width 1.09 mm.

Female: Body length 7.5 mm; antenna 5 mm; forewing 8 mm; hind leg 5.5 mm; pronotum length 0.96 mm, width 1.28 mm.

Larva: Unknown.

Adult. Head uniform medium brown apart from a darker patch at base of antennae; ocelli prominent. Antennae long with first segment of flagellum as long as scape. Pronotum uniform medium brown, rectangular and slightly wider than long. Forewing ( Fig. 10 ) with most distal crossveins white; 4 grey to brown bars across wing distally; areas between bars in middle of wing white; tip of wing brown. Rs fork 0.33 x length of Rs.

Male genitalia. ( Figs. 11, 12 ). Posterior margin of central sclerite concave. Membranous cone covered with dark spots and with sides tapered. Posterior sclerite long, dark and bulged at tip. Epiproct with tip curved and bulged and 2 pairs of teeth on epiproct margins. Paraproct with prominent bulge on dorsal margin below base of spine which is sturdy and slightly curved. Cerci each with about 12 segments and extended straight posteriorly.

Female genitalia. ( Fig. 13 ). Subgenital plate brown with medial third pale and with prominent lateral lobes of posterior margin dark brown. Subanal lobes dark brown.

Remarks. This species appears closely related to Z. patricki ( Figs. 14, 15 ). The male genitalia are similar and both have the cerci of about 12 segments which extend posteriorly. The differences in genital structures are shown for males in Figs. 12 and 14 and Table 1 . Differences in female genital patterns are shown in Figs. 13 and 15.

Etymology. This species is dedicated to aquatic insect photographer W. J. Crawford (a.k.a. Mayfly Bill) of Taupo, New Zealand for the great effort he has made in collecting aquatic insects for me.

Figures

Figs. 10-13. Zelandobius crawfordi. 10. Forewing, 11. Male genitalia, dorsal, 12. Male genitalia, lateral, 13. Female genitalia, ventral.

Figs. 14—15. Zelandobius patricki. 14. Male genitalia, lateral, 15. Female genitalia, ventral.