Anacroneuria singularis Righi-Cavallaro & Lecci

Ribeiro, José Moacir Ferreira, Gorayeb, Inocêncio De Sousa & Bispo, Pitágoras Da Conceição, 2015, Description of the nymph of Anacroneuria singularis Righi-Cavallaro & Lecci (Plecoptera: Perlidae) and a new locality record for northern Brazil, Zootaxa 4057 (2), pp. 295-300: 296-299

publication ID

http://dx.doi.org/10.11646/zootaxa.4057.2.11

publication LSID

lsid:zoobank.org:pub:B3963E23-8BDD-4655-AA33-78671D63C2FB

DOI

http://doi.org/10.5281/zenodo.3508918

persistent identifier

http://treatment.plazi.org/id/03C187FB-FFB9-7F35-88BD-FF17FE87344E

treatment provided by

Plazi

scientific name

Anacroneuria singularis Righi-Cavallaro & Lecci
status

 

Anacroneuria singularis Righi-Cavallaro & Lecci 

( Figs. 1–11View FIGURES 1 – 6View FIGURES 7 – 11)

Anacroneuria singularis Righi Cavallaro & Lecci, 2010: 42 View Cited Treatment   , figs. 13–18 Material examined. BRASIL, Pará, São Geraldo do Araguaia, Serra dos Martírios-Andorinhas, Sucupira stream, 24.x. 2011, aquatic net, J.M.F. Ribeiro & C.R.M. Santos (4 nymphs, MPEG); Santa Cruz stream, 24.x. 2011, light trap, J.M.F. Ribeiro & C.R.M. Santos (1 adult female, MPEG); stream near the bridge over the river Sucupira, 24.x. 2011, reared in stream, J.M.F. Ribeiro & C.R.M. Santos (1 adult female, 1 exuvia, MPEG); Sucupira stream (near the bridge), 24.x. 2011, reared in stream, J.M.F. Ribeiro & C.R.M. Santos (1 adult female, 1 exuvia, UNESP); Água Bonita stream, 06º 13 ´36,8´´S; 48 º 30 ´05,4´´W, 26.x. 2011, aquatic net, J.M.F. Ribeiro & C.R.M. Santos (18 nymphs, MPEG); Água Bonita stream, 26.x. 2011, aquatic net, J.M.F. Ribeiro & C.R.M. Santos (1 nymph, 1 exuvia, MPEG); Água Bonita stream, 26.x. 2011, aquatic net, J.M.F. Ribeiro & C.R.M. Santos (10 nymphs, MPEG); Brejão stream, 26.x. 2011, reared in stream, J.M.F. Ribeiro (2 adult males, MPEG); Jatobá stream, 27.x. 2011, aquatic net, J.M.F. Ribeiro & C.R.M. Santos (4 nymphs, MPEG); Gamelerinha stream, 27.x. 2011, aquatic net, J.M.F. Ribeiro & C.R.M. Santos (23 nymphs, MPEG); tributary of Sucupira stream, 6 º 17 ´ 59 ´´S; 48 º 25 ´ 20 ´´W, 28.x. 2011, aquatic net, J.M.F. Ribeiro & C.R.M. Santos (8 nymphs, MPEG); Água Verde stream, 06º04´16,5´´S; 48 º 50 ´15,5´´W, 30.x. 2011, aquatic net, J.M.F. Ribeiro & C.R.M. Santos (5 nymphs, 2 exuvias, MPEG); Água Verde stream, 30.x. 2011, aquatic net, J.M.F. Ribeiro & C.R.M. Santos (3 nymphs, MPEG); Água Bonita stream, 29.x. 2011, reared in stream, J.M.F. Ribeiro, & C.R.M. Santos (1 female, 1 exuvia, MPEG); Água Verde stream, 06º04´16,5´´S; 48 º 50 ´15,5´´W, 30.x. 2011, reared in stream, J.M.F. Ribeiro & C.R.M. Santos (1 adult female, MPEG); Sucupira stream (near the bridge), 07– 12.xii. 2013, Malaise trap, J.M.F. Ribeiro (2 adult males, MPEG); Água Bonita stream, 07– 12.xii. 2011, aquatic net, J.M.F. Ribeiro & C.R.M. Santos (5 nymphs, MPEG); 07.xii. 2013, light trap, J.M.F. Ribeiro (1 adult male, MPEG); Água Bonita stream, 07– 12.xii. 2013, J.M.F. Ribeiro (29 nymphs, 3 exuvias).

Description of nymph. General color dark brown ( Fig. 1View FIGURES 1 – 6). Head, antennae brownish, basally light yellow; two ocelli; frons uniformly dark brown with M-line indistinct and with small lateral spots near the ocelli; parietalia whitish, brown on coronal and postfrontal lines; compound eyes black; postfrontal line U-shaped ( Fig. 2View FIGURES 1 – 6); labrum brown with fine bristles; labium as in Fig. 3View FIGURES 1 – 6 and with ochraceous palpi; maxilla as in Fig. 4View FIGURES 1 – 6 and also with ochraceous palpi; mandible robust with the 2 nd, 3 rd and 4 th teeth subequal ( Figs. 5, 6View FIGURES 1 – 6); in molar area, two rows of bristles, one starting at the base of the 2 nd tooth and the other at the base of the 4 th tooth ( Figs. 5, 6View FIGURES 1 – 6). Thorax, pronotum dorsally brown with ochraceous spots, lateral margins light brown, anterior and posterior margins dark brown ( Fig. 2View FIGURES 1 – 6); ventrally pale yellow with sulci well marked ( Figs. 8View FIGURES 7 – 11); mesonotum and metanotum dark brown with ochraceous spots ( Fig. 7View FIGURES 7 – 11). Gills ASC 1, PSC 1 with two branches, AT 2, AT 3, PT 3, A 1 with double trunk; ASC, PSC (2,3) and SL absent. Fore leg dorsally ochraceous ( Fig. 9View FIGURES 7 – 11), whitish ventrally ( Fig. 10View FIGURES 7 – 11); coxa with few bristles; trochanter with few robust bristles; femur with two transverse dorsal rows of long robust bristles ( Fig. 9View FIGURES 7 – 11), ventral face with few bristles ( Fig. 10View FIGURES 7 – 11); base of the tibia dark yellow; tibia apically with rows of short fine bristles, a group of dense fine white long bristles form a fringe, in posterior margin (barely visible in Figs. 9 and 10View FIGURES 7 – 11); tarsus ochraceous. Abdomen brown, intersegmental membranes ochraceous; rows of bristles around the posterior margin are complete on segments 8 to 10; in females, presence of a median sulcus on sternite 8. Cerci brownish ( Fig. 11View FIGURES 7 – 11).

Variation. General body color varies from dark to light brown. Younger nymphs have additional and stouter bristles, appearing more pilose. Markings on the pronotum vary in color, shape, and size.

Discussion. A. singularis  has been collected mainly in central Brazil and this is the first report of the species from the municipality of São Geraldo do Araguaia, Serra dos Martírios-Andorinhas, Pará State. The nymph of this species ( Figs. 1–11View FIGURES 1 – 6View FIGURES 7 – 11) resembles those of A. debilis (Pictet, 1841) ( Silva et al. 2011)  and A. marlieri Froehlich 2001 ( Ribeiro & Gorayeb 2014)  , principally in general body form and coloration. It differs from A. debilis  in the color of anterior dorsal portion of the head, which in A. singularis  is uniformly dark brown to the postfrontal line; in A. debilis  it becomes lighter near ocelli ( Silva et al. 2011). Anacroneuria singularis  differs from A. marlieri  by the presence of ochraceous spots on the brown pronotum (in A. marlieri  , uniformly brown, Ribeiro & Gorayeb 2014).

Ecological notes. Nymphs of A. singularis  were collected from five relative pristine streams in a protected natural area in southern Pará State in northern Brazil. The physical and chemical parameters of the sampled streams were: water temperature (24–29 o C); pH (6.0– 6.7); specific conductance (9.1–86.8 uS /cm); dissolved oxygen (11,0– 20,0 mg/l); width of stream (2.7–6.6 m); depth of stream (0.17–0.60 cm); velocity of flow (0.06– 0.31 m /s), and stream discharge (0.10–0.77 m 3 /s). Nymphs were always collected from riffle areas with from sandy and loose rocky substrates.

MPEG

Museu Paraense Emilio Goeldi

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Plecoptera

Family

Perlidae

Genus

Anacroneuria

Loc

Anacroneuria singularis Righi-Cavallaro & Lecci

Ribeiro, José Moacir Ferreira, Gorayeb, Inocêncio De Sousa & Bispo, Pitágoras Da Conceição 2015
2015
Loc

Anacroneuria singularis Righi Cavallaro & Lecci, 2010 : 42

Cavallaro 2010: 42