Calineuria sp. A

Stark, Bill P. & Green, Stephen, 2011, Eggs Of Western Nearctic Acroneuriinae (Plecoptera: Perlidae), Illiesia 7 (17), pp. 157-166 : 159

Calineuria sp. A

( Figs. 5-8 )

Material examined. California: Marin Co., Muir Woods, Redwood Creek , 21 June 1985, B. Stark, 1♀ ( BPS) . Same location, 18 June 1966, R . W. Baumann, 1♂, 1♀ ( BYU) .

Egg. Outline oval, collar absent ( Fig. 5 ). Length ca.

440 μm, equatorial width ca. 372 μm. Chorionic surface without punctations or obvious follicle cell impressions ( Figs. 6, 8 ). Micropylar row subequatorial; micropylar orifices with raised rims ( Fig. 7 ).

Comments. Eggs of C. californica ( Figs. 1-4 ) and the three species of Japanese Calineuria ( Isobe 1988; 1997) have similar short stalked collars encircled by a low to well developed basal ridge. The chorionic surface is punctate in the Japanese species but smooth or with obscure follicle cell impressions in C. californica and C. sp. A ( Figs. 2 , 6 ). The male and female of C. sp. A appear indistinguishable from C. californica in color pattern, subgenital plate shape and aedeagal armature, however, the egg has no collar. These specimens may represent an undescribed species, but a larger sample and a comprehensive study of other Calineuria specimens is needed in order to evaluate its status. Drumming and molecular data may also be desirable.

Figures

Figs. 5-8. Calineuria sp. A eggs, California, Marin Co., Redwood Creek, Muir Woods. 5. Egg, lateral aspect. 6. Collar end. 7. Micropyle. 8. Anterior end.

Figs. 1-4. Calineuria californica eggs, Montana, Lincoln Co., Yaak River. 1. Egg, lateral aspect. 2. Collar end. 3. Collar end with anchor. 4. Anterior end.