Anacroneuria ngabe, Stark & Armitage, 2018

Stark, Bill P. & Armitage, Brian J., 2018, The Plecoptera of Panama. II. Two new species, one new country record, and additional locality records of Anacroneuria (Perlidae) from western Panama, Zootaxa 4459 (2), pp. 315-326 : 319-320

Anacroneuria ngabe sp. n.

( Figs. 6–10 , 12 )

http://lsid.speciesfile.org/urn:lsid: Plecoptera .speciesfile.org:TaxonName:503256

urn:lsid:zoobank.org:act:7D889D39-6654-4C3D-89A7-14F52746853B

Material examined. Holotype ♂, 4 ♀ paratypes from Panama, Chiriqui Province, Cuenca 93 ( Río Guabo ), afluente Río Guabo , NNE Fortuna Dam nr. Fortuna Cabins, 8.77806°N, 82.19359°W, 1128 m, UV light, 18 February 2018, B. and T. Armitage (Holotype ♂ COZEM; paratype ♀ COZEM, BPSC) .

Adult habitus. General body color yellow with brown patches. Head yellow except for dark brown lappets and antennae; ocellar area with obscure darker yellow brown pigment spot. Median half of pronotal disc yellow, lateral areas brown ( Fig. 6 ). Wings brown, veins darker except pale costa. Femora mostly yellow but with a small, dark brown distal area; tibiae banded, dark brown distally and proximally, and with a yellow median band.

Male. Forewing length 11 mm. Hammer absent, or at most a low membranous disc ( Fig. 7 ). Aedeagal apex simple but lateral margins curved outward near tip, and apex with a small notch; ventral keel conspicuous, consisting of a pair of long, curved ridges that form an X-pattern beyond the hooks; a pair of prominent membranous lobes present subapically. Hooks very slender ( Figs. 8–10 ).

Female. Forewing length 12–13 mm. Subgenital pate bilobed, lobes separated by a V-shaped notch ( Fig. 12 ).

Larva. Unknown.

Etymology. The species name is proposed in honor of the Ngäbe people of Chiriqui province and adjacent areas of Panama.

Diagnosis. The general body color is yellow patterned with dark brown and the median yellow pronotal band is relatively wide and the dark area near the ocelli is obscure. This general head/pronotal color pattern is shared by at least nine other Anacroneuria species known to occur in Panama and Costa Rica, therefore the color pattern is not considered distinctive. Males of this species will key to A. varilla Stark, 1998 and the aedeagal apices of the two are somewhat similar, but in A. varilla the aedeagal apex is truncate and has parallel lateral margins and the dorsal keel of A. varilla is obscure. Female subgenital plates of the two species are also quite similar.

Figures

FIGURES 6–10. Anacroneuria ngabe male, afluente Río Guabo, Chiriqui Province, Panama. 6. Head and pronotum. 7. Male sternum 8 with hammer. 8. Aedeagus, ventral. 9. Aedeagus, lateral. 10. Aedeagus, dorsal.

FIGURES 11–14. Anacroneuria spp. Head and pronotum, or female subgenital plate. 11. A. chiriqui, subgenital plate. 12. A. ngabe, subgenital plate. 13. Anacroneuria sp. PA-1, head and pronotum. 14. Anacroneuria sp. PA-1, subgenital plate.