Chinoperla porntip, Sivec & Stark, 2010

Sivec, Ignac & Stark, Bill P., 2010, Five New Species Of Chinoperla Zwick (Plecoptera: Perlidae) From Vietnam And Thailand, Illiesia 6 (8), pp. 62-74 : 64

Chinoperla porntip sp. n.

( Figs. 5-10 )

Material examined. Holotype ♂ and paratype ♀ from Thailand, Chiang Mai Province, Doi Inthanon National Park, Namtok Siriphum waterfall, 1460 m, 98° 31’ N, 18° 32’ E, 7-8 June 2002, Chiang Mai University Team ( PMSL). Additional paratypes: Thailand: Type locality, 19 May 2001, 28♂, 10♀ ( PMSL). Chiang Mai Province, Doi Inthanon National Park , Namtok Siriphum , lower waterfall, 1380 m, 98° 31’ N, 18° 32’ E, 7-8 June 2002, 1♂, 2♀ ( PMSL). Chiang Mai Province, Doi Inthanon National Park , Huai Sai Lueng , 1060 m, 98° 27’ N, 18° 31’ E, 9 May-8 June 2002, 8♂, 8♀ ( PMSL). Same site, 4 April-3 May 2002, 4♀ ( PMSL). Same site, 8 June-7 July 2002, 2♀ ( PMSL).

Adult habitus. Biocellate. Head dark brown, nearly black; palpi brown, antennae pale at base and darker distally. Pronotum dark brown except at anterolateral angles; rugosities obscure. Wings and veins dark brown. Legs and cerci uniformly brown. Male. Forewing length 9 mm. Dark median process of tergum 9 slightly expanded posteriorly and concave along lateral margins ( Fig. 5 ). Finger shaped hemitergal processes about 2.5 times long as basal width. Aedeagal tube sclerite forming an expanded bracelet-like distal ring; sac expanded at apex into a sagittate process covered with spines; apex of sac with a short, thick recurved hook ( Figs. 6-8 ).

Female. Forewing length 12 mm. Subgenital plate slightly produced and bearing a shallow mesal notch ( Fig. 9 ).

Egg. Tear drop shaped with long slender collar and stalked anchor ( Fig. 10 ).

Larva. Unknown.

Etymology. The species name, used as a noun in apposition, honors Professor Dr. Porntip Chantaramongkol for her assistance and leadership in the study of Thai aquatic insects.

Diagnosis. The aedeagus of this species is generally similar to those of C. spinata and C. yi (both described below) in having a single, thick, curved hook on the aedeagal apex ( Fig. 6 ), and a somewhat Y-shaped median sclerite on tergum 9 ( Fig. 5 ). It differs from both species in having the aedeagal apex sagittate ( Figs. 7-8 ) and in having the aedeagal tube sclerite encircle much of the tube apex as a slender band ( Fig. 8 ).

Figures

Figs. 5-10. Chinoperla porntip. 5. Male terminalia. 6. Aedeagus ventral. 7. Aedeagus lateral. 8. Aedeagus dorsal. 9. Female terminalia. 10. Egg.