Plecoptera

Ribeiro, José Moacir Ferreira & Gorayeb, Inocêncio De Sousa, 2016, Key to Plecoptera nymphs from the Brazilian Amazon (Insecta), Zootaxa 4208 (5), pp. 433-445 : 438-444

publication ID

https://doi.org/10.11646/zootaxa.4208.5.2

publication LSID

lsid:zoobank.org:pub:9B40CAE2-1751-4305-BCC1-447DA150598C

DOI

https://doi.org/10.5281/zenodo.5621686

persistent identifier

https://treatment.plazi.org/id/4E06464F-0B60-FFFD-FF60-270E42C0FD0B

treatment provided by

Plazi

scientific name

Plecoptera
status

 

Key to Plecoptera nymphs of the Brazilian Amazon

The following key includes eight species whose nymphs have been associated with their adults and 14 morphospecies known only from their nymphs.

1 Two ocelli...........................................................................................2

- Three ocelli ( Enderleina ) ............................................................................. 21

2 Body ranging from light yellow to brown. Spot present on head contouring or not the ecdysial suture, reaching the base of ocelli or not, and extending to the area between the ocelli or not. Post-frontal line not curved between ocelli ( Figs. 2, 3, 6, 7 View FIGURES 2 – 8 ). Distance between ocelli 0.2 mm. Lacinia with groups of 5 to 7 bristles below the lower tooth. Presence of groups of bristles on the femur. Gills with the following disposition: ASC1, PSC 1 with two trunks, AT2, AT3, PT3, A1 dual trunks; ASC, PSC (2.3) and SL absent ( Anacroneuria )...........................................................................3

- Body ranging from light yellow to dark yellow. Spots absent in the head. Post-frontal line curved between the eyespots ( Figs. 5, 8 View FIGURES 2 – 8 ). Distance between the eyespots at least 0.3 mm; Lacinia groups with 6 to 8 bristles below the lower tooth. Absence of bristles on the femur. Gills with the following provision: ASC and PSC [1,2,3] AT [2,3] PT [3] all with simple trunk; and SL with multiple trunks ( Macrogynoplax )....................................................................18

3 Body light yellow.................................................................................... 4

- Body yellow-orange to dark brown........................................................................ 5

4 Body light yellow with little pilosity. Head pale yellow, without spots. Pronotum without spots. Meso- and metanotum without medians spots [AM, PA]....................................................... Anacroneuria minuta ( Fig. 13 View FIGURES 13 – 18 )

- Body brown......................................................................................... 9

5 Head spot exceeding ecdysial suture and ocelli ( Fig. 2 View FIGURES 2 – 8 )....................................................... 6

- Head spot not exceeding ecdysial suture and ocelli ( Figs. 3, 6, 7 View FIGURES 2 – 8 )............................................. 10

6 Body light to dark brown...............................................................................7

- Body yellow-orange to dark yellow...................................................................... 8

7 Body dark brown. M-line inconspicuous. Pronotum with a median area without spots and with posterior median concavity. Meso- and metanotum with medial and lateral spots forming circles or discs, borders pale yellow. [AM, AP, PA, MA, MT, RR]............................................................................ Anacroneuria marlieri ( Fig. 14 View FIGURES 13 – 18 )

- Body light brown. M-line conspicuous. Pronotum with median area pale yellow without median concavity. Meso- and metanotum with inconspicuous spots, lateral borders whitish [AM, PA, MA, AC]........... Anacroneuria manauensis ( Fig. 15 View FIGURES 13 – 18 )

8 Head with M-line inconspicuous. Pronotum with short longitudinal spots, without posterior median concavity. Meso- and metanotum with large median whitish spots [AM]................................. .. Anacroneuria sp. AB1 ( Fig. 16 View FIGURES 13 – 18 )

- Head with M-line conspicuous. Pronotum without median spots, with slight posterior median concavity. Meso- and metanotum with small median yellowish spots [AM]......................................... Anacroneuria sp. AB2 ( Fig. 17 View FIGURES 13 – 18 )

9 Pronotum with long longitudinal median spots, lateral spots small and whitish, with posterior median concavity. Meso- and metanotum with large, medium and small whitish spots spots [PA, MT]................ Anacroneuria singularis ( Fig. 18 View FIGURES 13 – 18 )

- Pronotum without longitudinal and lateral spots with median area lighter, without posterior median concavity. Meso- and metanotum with small spots forming whitish circles [PA]............................ Anacroneuria sp. AB3 ( Fig. 19 View FIGURES 19 – 24 )

10 Head spot not reaching the ecdysial suture, reaching halfway to the frontal area, not reaching the area behind the ocelli [PA, AP]........................................................................ Anacroneuria sp. AB4 ( Fig. 20 View FIGURES 19 – 24 )

- Head spot passing half of the frontal area, reaching the area behind the ocelli ( Fig. 2 View FIGURES 2 – 8 )............................... 11

11 Head spot extending to the area between the ocelli ( Figs. 3, 6 View FIGURES 2 – 8 ).................................................12

- Head spot not extending to the area between the ocelli ( Fig. 7 View FIGURES 2 – 8 )................................................17

12 Head spot narrow in the area between the ocelli ( Fig. 3 View FIGURES 2 – 8 )......................................................13

- Head spot wide in the area between the ocelli ( Fig. 6 View FIGURES 2 – 8 )....................................................... 14

13 Body dark yellow to light brown. Head light yellow with the post-frontal area brown. Pronotum without spots, lighter yellow medially. Meso- and metanotum with circular dark yellow or whitish spots [PA]......... .. Anacroneuria sp. AB5 ( Fig. 21 View FIGURES 19 – 24 )

- Body yellow-orange. Head orangish. Pronotum with median and longitudinal yellowish spots. Meso- and metanotum with orange yellow spots medially [AM]............................................. Anacroneuria sp. AB6 ( Fig. 22 View FIGURES 19 – 24 )

14 Head with yellow-orange spot on post-frontal area and between ocelli.......................................... 15

- Head with light brown spot on post-frontal area and between ocelli............................................ 16

15 Pronotum without spots, without posterior median concavity. Meso- and metanotum with a set of bright spots semicircular, not elongated, in the anterior median area [PA, MT].................................... Anacroneuria sp. AB7 ( Fig. 23 View FIGURES 19 – 24 )

- Pronotum with spots circular whitish, with slight posterior median concavity. Meso- and metanotum with spots in the shape of elongated handles that extend from to the upper side to the median area [PA, MT]........ Anacroneuria sp. AB8 ( Fig. 24 View FIGURES 19 – 24 )

16 Body brown. Head with M-line conspicuous, with spot slightly reaching and not passing ocelli, bordering the ecdysial suture. Pronotum with elongated median and longitudinal spots, laterally forming small ellipses and semi-circles, with slight posterior median concavity. Meso- and metanotum with wide anterolateral and posterolateral whitish spots, slightly ovoid, uniform or in the form of semi-circles[PA]................................................... Anacroneuria sp. AB9 ( Fig. 25 View FIGURES 25 – 30 )

- Body light brown. Head with M-line inconspicuous, spot passing ocelli and not bordering ecdysial line. Pronotum with two large spots forming whitish semirectangles, without posterior median concavity. Meso- and metanotum with lateral whitish spots in the form of parentheses “()”, forming elongated “handles” extending from the anterior median area [PA]................................................................................... Anacroneuria sp. AB10 ( Fig. 26 View FIGURES 25 – 30 )

17 Body yellow-orange with ferruginous hue. Head orange with the postfrontal area brown. Pronotum with elongated and uniform median ferruginous spot extending to the lateral, distal and apical borders, contrasting with the surrounding dark brown coloring. Meso- and metanotum with large and uniform median ferruginous spot [PA].... Anacroneuria sp. AB11 ( Fig. 27 View FIGURES 25 – 30 )

- Body light yellow. Head yellow with postfrontal area, dark orange. Pronotum with spots inconspicuous. Meso- and metanotum with uniform yellowish median spot, inconspicuous, of orange color hues [AM]........ .. Anacroneuria sp. AB12 ( Fig. 28 View FIGURES 25 – 30 )

18 Body light to dark yellow with light brown color hues........................................................ 19

- Body dark yellow with greenish and reddish color hues......................................................20

19 Body light yellow. Head light yellow with conspicuous M-line. Pronotum with anterior circular spots and two wide longitudinal median whitish markings of dark brown color hues on the lateral margins. Meso- and metanotum with large whitish median circular spots, with two short and thin dark markings on the lateral margins. [AM]....... Macrogynoplax sp. AB1 ( Fig. 29 View FIGURES 25 – 30 )

- Body dark brown. Head light brown with inconspicuous M-line. Pronotum without markings. Meso- and metanotum with light yellow semicircular median spots, with two dark markings anteriorly slightly wider and posteriorly longer and thinner on the lateral margins [AM, AP, PA]................................................. Macrogynoplax delicata ( Fig. 30 View FIGURES 25 – 30 )

20 Body dark yellow with greenish color hues. Head dark yellow without spots. Pronotum without spots. Meso- and metanotum with large uniform dark yellow medial spot with greenish color hues [AM, AP, PA]...... Macrogynoplax pulchra ( Fig. 31 View FIGURES 31 – 34 )

- Body orange with reddish color hues. Head with elongated triangular spots with reddish color hues lateral to each ocellus, and two inverted U-shaped sinuous markings just below the antero-lateral ecdisyal suture to the compound eyes. Pronotum with dark reddish spots. Meso- and metanotum with light yellow median and lateral markings with reddish borders [AP]................................................................................. Macrogynoplax sp. AB2 ( Fig. 32 View FIGURES 31 – 34 )

21 Body light to dark yellow. Head dark yellow without spots, M-line inconspicuous. Pronotum without spots. Meso- and metanotum without spots [AM, AP, PA]................................................ Enderleina froehlichi ( Fig. 33 View FIGURES 31 – 34 )

- Body pale brow. Head light brown with conspicuous M-line. Pronotum with inconspicuous spots, with two dark marking longer and larger on the lateral margins. Meso- and metanotum with small inconspicuous spots [AM, RR].................................................................................................. Enderleina flinti ( Fig. 34 View FIGURES 31 – 34 )

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Plecoptera