Anacroneuria suerre Bravo & Romero

Bravo, Francisco, Romero, David, Gutiérrez-Fonseca, Pablo E. & Echeverría-Sáenz, Silvia, 2019, The description of Anacroneuria suerre sp. nov. from Costa Rica (Plecoptera: Perlidae) and using nymphs in ecotoxicological studies, Zootaxa 4608 (2), pp. 357-364: 359-362

publication ID

https://doi.org/10.11646/zootaxa.4608.2.9

publication LSID

lsid:zoobank.org:pub:3705D3EF-68E0-4B8D-9F3C-C3B1CC9B2D30

DOI

http://doi.org/10.5281/zenodo.3717766

persistent identifier

http://treatment.plazi.org/id/038787BA-FFC2-FFD5-9BEC-FC8CFC54F98C

treatment provided by

Plazi

scientific name

Anacroneuria suerre Bravo & Romero
status

 

Anacroneuria suerre Bravo & Romero   , sp nov.

Material examined. Holotype ♂: Costa Rica, Limón, upper basin Rio Jimenez , 10° 10’ 24.38” N, 83° 45 ‘7.35” W, 428 masl, 02 February-25 September 2018, F. Bravo & D. Romero (( USNM. GoogleMaps   Paratypes, same data as holotype: 1♂ MNCR, 1♂ MZUCR, 1♂ LEUNA. GoogleMaps  

Adult Habitus: General color brownish. Head with a dark brown spot from behind ocelli to M-line in a broad patch covering occiput, extending forward and lateral of callosities in a light brown tone; M-line discontinuous with well-defined limits; lappets brown and mesal field forward of M-line light brown; antennae brown ( Fig. 2A View FIGURE 2 ). Pronotum with lateral dark bands; narrow pronotal stripe brown with a median pale line, bordered by light median region, irregular midlateral strips brown with scattered pale rugosities ( Fig. 2A View FIGURE 2 ). Femora mostly pale distally brown, foreleg tibia and mesothoracic legs mainly yellow with some darkened areas, hind tibia yellowish brown with basal and apical sections darkened, tarsi dark.

Wing membrane brown, veins brown except C and Cs pale. Cerci yellowish with the last four segments dark.

Male. Forewing length 10-12 mm; antennae length 8-9 mm. Hammer thimble shaped, basal diameter slightly wider than at the apex.Aedeagal apex widened at the base, extending forward from broad sinuate shoulders, apically rounded and gradually narrowed forming a scoop; ventral membranous lobes well developed, formed basally by inward folds, aedeagal hooks slender projecting beyond the shoulders ( Fig. 2D View FIGURE 2 ); dorsal keel poorly developed with two widely separated and apically divergent fringes ( Fig. 2F View FIGURE 2 ), lateral view of dorsal keel concave ( Fig. 2E View FIGURE 2 ).

Female. Forewing length 14-15 mm; cerci length 9-10 mm; antennae length 10-11 mm. Subgenital plate with four subequal lobes; external lobes much larger that inner, slightly wider than high; mesal notch deep, V-shaped. Transverse sclerite of sternum nine absent, posterior margin slightly sinuated, mesal sclerite T-shaped scarcely setose and with a marginal patch white and devoid of bristles ( Fig. 2C View FIGURE 2 ).

Comments. The general habitus of the male of A. suerre   is most similar to A. chiriqui Stark & Armitage, 2018   described from Panama, but the aedeagal apex of the new species has well-defined subapical membranous lobes, and tibiae and tarsi have yellow markings ( Fig. 2A View FIGURE 2 ). In addition, the lateral lobes in A. chiriqui   are longer, curved and extending laterally unlike the new species ( Fig. 2F View FIGURE 2 ); the dorsal aedeagal keel in A. suerre   is less conspicuous than in A. chiriqui   , and the hammer is shorter, wider and less distinctly thimble shaped. Furthermore, the inner lobes of the subgenital plate of the female adult of A. suerre   are more rounded, not acute, as in A. chiriqui   ( Fig. 2C View FIGURE 2 ). The new species also resembles the widespread Central American A. lineata (Navas, 1924)   , but it has a thimble shaped hammer and lateral view, the dorsal keel of the aedeagus is concave. Adults of A. suerre   also differs from both A. chiriqui   and A. lineata   by having a medial pronotal brown stripe with a medial pale line in both teneral and fully mature specimens ( Fig. 3 View FIGURE 3 ).

Nymph. Body length: 9-10mm. General color brownish in dorsal view, yellow in ventral position. Head brown mainly from ocelli to frontoclypeal region, with lighter areas besides and behind ocelli; “M” line well defined ( Fig. 4A View FIGURE 4 ). Eyes and ocelli dark. Irregular line of setae from dark spots of the base of head to the posterior dorsal region of the eyes. Labrum, labium, right maxillae, and right mandible as in Figs. 4B, 4C, 4D & 4E View FIGURE 4 . Pronotum rectangular with rounded margins, median line pale, with a pale and well-defined pattern. Edge of pronotum with short and fine bristles. Rest of pronotum dark brown, covered by fine, short and dark hairs.

Meso- and metanotum almost alike in color and brown pattern, forming a “v” when mature and pale in apical regions. Median pale spots creating a butterfly-like figure ( Figure 4A View FIGURE 4 ). Rest of meso- and metanotum dark brown, covered by fine, short and dark hairs. Groups of short but width setae are distributed randomly in these structures. Forefemur with a line of 6-7 bristles, close to the front apical area ( Fig. 5A View FIGURE 5 ). Median and hairless line that goes over ¾ of forefemur longitude. Most of forefemur covered by fine, short and dark hairs. Ventral area of coxa as in Fig. 5B View FIGURE 5 .

Comments. The nymph of A. suerre   appears most similar to the known nymphs of A. lineata   and A. varilla Stark, 1998   , but the “M” line is incomplete and pronotum more rectangular with rounded margins, and not as wide anteriorly.

Etymology. The species name refers to the stream where the specimen was collected, located in the upper basin of Río Jimenez, Limón, Costa Rica. It is used as a noun in apposition.

MNCR

Costa Rica, San Jose, Museo Nacional de Costa Rica

MZUCR

MZUCR

LEUNA

LEUNA

USNM

Smithsonian Institution, National Museum of Natural History

MNCR

Museo Nacional de Costa Rica