Phanoperla lobata, Sivec & Stark, 2010

Sivec, Ignac & Stark, Bill P., 2010, Seven New Species Of Phanoperla Banks From Vietnam And Thailand (Plecoptera: Perlidae), Illiesia 6 (10), pp. 98-112 : 103-104

Phanoperla lobata sp. n.

( Figs. 16-18 )

Material examined. Holotype ♂ and 4♂ paratypes from Dong Nai, Vietnam, Cat Tien National Park , stream N of Park Headquarters, 120 m, 23 August 1998, B. Hubley, D. Currie, ROM 982006 (holotype ROM, paratypes ROM, IEBR). Additional paratypes: Vietnam: Dong Nai, Cat Tien National Park , stream N of Park Headquarters, 120 m, 22 August 1998, B. Hubley, D. Currie, ROM 982002, 2♂ ( BPS). Dong Nai, Cat Tien National Park, gazebo near Park Headquarters, Dong Nai River, 31 May 1999, D. Currie, D.C. Darling, B. Hubley, ROM 993045, 1♂ ( ROM). Nam Cat Tien, 200 m, 17-25 June 1995, H. Malicky, 1♂ ( PMSL).

Adult habitus. Biocellate. General body color in alcohol pale without dark markings on head. Pronotum pale with obscure, slightly darker rugosities; entire pronotal margins dark brown. Wings membranous, veins pale brown; Rs with two branches. Legs pale brown.

Male. Forewing 7.0-7.5 mm. Tergum 8 with a wide, slightly produced median lobe. Tergum 9 with median and two lateral sensilla basiconica patches set on low humps. Process of hemitergal lobes curved slightly laterad, wide basally and tapered to tip ( Fig. 16 ). Mesal clusters of long setae present on abdominal sterna 5-7. Aedeagal tube and sac without lateral lobes; dorsal sclerite rhomboid-shaped and almost as long as tube; sac short, plump, curved ventrad and armed laterally with prominent transverse double rows of lateral spines; spine rows incomplete on dorsal ( Fig. 18 ) and ventral ( Fig. 17 ) margins; larger more basally located row in lateral aspect consists of 6-8 large black cultriform spines; smaller more apically located row in lateral aspect consists of ca. 6 smaller, black cultriform spines; additional clusters of smaller spines occur on each side of large spine rows, and another cluster of relatively large spines occurs near apex ( Figs. 17-18 ).

Female. Unknown.

Larva. Unknown.

Etymology. The species name refers to the presence of a small lobe on the male 9 th tergum.

Diagnosis. The absence of lateral lobes and the aedeagal armature detail of this species are similar to those features in P. incompleta Zwick , but that species has many more spines in the double rows and the spines are more similar in size. In addition, P. incompleta has no lobe on tergum 8 ( Zwick 1986). The aedeagus is also similar to that of P. namcattien , a new species proposed by Cao & Bae (2009) from Nam Cat Tien, but that species is shown to have longer, more slender spines with a more extensive subapical grouping and it apparently also lacks a lobe on tergum 8. Specimens of P. namcattien were unavailable to us.

Figures

Figs. 16-18. Phanoperla lobata. 16. Male terminalia, dorsal. 17. Fully everted aedeagus, lateral. 18. Fully everted aedeagus, dorsal.