Kamimuria gressitti, Stark & Sivec, 2013

Stark, Bill P. & Sivec, Ignac, 2013, Kamimuria Gressitti, A New Stonefly Species From China (Plecoptera: Perlidae), And New Records Of K. Atra From Vietnam, Illiesia 9 (11), pp. 116-121 : 119-120

Kamimuria gressitti , sp. nov.

( Figs. 1-8 )

Material examined. Holotype ♂ and paratype ♀ from CHINA, W. Hupeh (Hubei Province), Lichuan District, Suisapa , 1000 m, 23 August 1948, J.L. Gressitt, Djou (California Academy of Sciences).

Adult Habitus. Three ocelli. Color pattern apparently pale brown, without distinctive pattern, but obscured by specimen condition. Wings pale, veins pale amber.

Male. Forewing length 20.5 mm. Hemitergal lobes slender, finger-like, bluntly rounded at the apex and bearing a small patch of sensilla basiconica along ventroapical margins ( Figs. 1-2 ); hemitergal lobes meet in median field of tergum 10 in dorsal aspect, and approach anterior margin of tergum 10; in lateral aspect a slight ventral swelling occurs near midlength of hemitergal lobes ( Fig. 2 ). Tergum 9 with a median patch of sensilla basiconica; sterna 4-6 with well developed hair brushes. Aedeagus membranous, relatively straight, but constricted subapically, near midlength, and at base of aedeagal tube ( Fig. 4 ); armature extensive on subapical sac portion, consisting of a circular band of sharp, triangular spines; band narrowly divided medially on dorsal surface and more broadly on ventral surface; fine microtrichia occur in a pair of apicolateral patches ( Figs. 3-4 ) and similar patches occur ventrally on the middle tube section ( Fig. 5 ) and ventrally on the basal envelope section ( Fig. 5 ). Female. Forewing length 22 mm. Subgenital plate a short, triangular projection, barely reaching the anterior margin of sternum 9 ( Fig. 6 ), and bearing a small median notch. Vagina membranous but partially lined with pale setae around wide posterior section at gonopore; anterior section slightly narrower from midlength, and bearing a prominent, balloon-like spermatheca on a slender stalk ( Fig. 7 ).

Egg. Length ca. 0.41 mm, width ca. 0.24 mm. Somewhat barrel shaped with short, wide, slightly flanged collar ( Fig. 8 ). Chorion smooth.

Larva. Unknown.

Etymology. The patronym honors the late J. Linsley Gressitt, distinguished Coleopterist and Naturalist, director of the “Dawn Redwood Expedition”, and co-collector of the type series of this species.

Diagnosis. The aedeagal armature size and general aedeagal shape is somewhat similar to that of K. similis Klapálek (Sivec & Stark 2008) , however the new species lacks the enlarged pair of dorsal spines found in K. similis , and the hemitergal lobes of the latter species bear an abrupt subapical notch not found in the new species. There is also a general similarity with K. atrocephala Sivec & Stark , however that species has a more extensive patch of lateral spines along the aedeagal tube and sac, and a small patch of sensilla basiconica on tergum 8. Unfortunately, the provisional key in Sivec & Stark (2008) is based, in part, on pigment patterns and is therefore, unsuitable for specimens like these which have obscure pigmentation.

Figures

Figs. 1-5. Kamimuria gressitti male genitalia. 1. Terga 9-10. 2. Right hemitergum, lateral aspect. 3. Aedeagal apex, dorsal. 4. Aedeagus, lateral. 5. Aedeagus, ventral.

Figs. 6-8. Kamimuria gressitti female genitalia. 6. Abdominal sterna 8-9. 7. Vagina and spermatheca. 8. Outline of egg.