Anacroneuria morsei, Stark, 2014

Stark, Bill P., 2014, Records Of Mesoamerican Anacroneuria (Plecoptera: Perlidae), With Descriptions Of Four New Species, Illiesia 10 (2), pp. 6-16 : 12

Anacroneuria morsei sp.n.

( Figs. 6-10 )

Material examined. Holotype ♂ (pinned), Costa Rica, Alajuela, Rio La Paz, Rt. 9 , 7.6 km N Vara Blanca, 10.208 ° N, 84.166 ° W, 1340 m, 13 February 1986, J. Morse ( USNM) . Paratype: Costa Rica, Guanacaste, Rio Negro, Parque Nacional Rincón de la Vieja, 10.765 ° N, 85.313 ° W, 810 m, 3 March 1986, R. Holzenthal, Fasth, 1♂ (pinned) ( USNM) .

Adult habitus. General color yellow patterned with brown pigment. Head with dark pigment covering ocelli and extending forward and laterad of callosities; occiput dark behind eyes, lappets and an anteromedian triangular area of frons dark brown. Median pronotal band yellow, lateral areas of disc brown with darker rugosities ( Fig. 6 ).

Male. Forewing length 20 mm. Hammer a low mound ( Fig. 7 ). Aedeagal apex weakly trilobed; large mesal lobe truncate or notched at tip, lateral lobes small and covered by conspicuous ventral membranous lobes ( Figs. 8-9 ); hooks slender, dorsal keel absent ( Fig. 10 )

Female. Unknown.

Larva. Unknown.

Etymology. The patronym honors Dr. John Morse, a distinguished trichopterist, colleague, friend, and collector of the holotype specimen.

Diagnosis. The aedeagus of this species is generally similar to that of A. brailovskyi Stark & Kondratieff, 2004 a species known from Mexico ( Stark & Kondratieff 2004), however in that species the aedeagal apex is expanded near the tip, the lateral lobes are less distinct and the apical section is not angled ventrad in lateral aspect as in the new species ( Fig. 9 ). The aedeagus of a Costa Rican species, A. exquisita is also similar ( Stark 1998) and the new species keys to couplet 11 in Stark (1998) which includes A. exquisita as one of the choices. However, the median lobe of the aedeagal apex is not notched and is more slender than in A. morsei . The new species is also distinct from A. brailovskyi and A. exquisita in head and pronotal pigment patterns (compare Fig. 6 with Fig. 41 in Stark 1998 and Fig. 29 in Stark & Kondratieff 2004).

Figures

Figs. 6-10. Anacroneuria morsei sp.n. male. 6. Head and pronotum. 7. Sternum 9 with hammer. 8. Aedeagus, ventral. 9. Aedeagus, lateral. 10. Aedeagus, dorsal.