Anacroneuria minuta Klapálek, 1922

Menezes, Emely Trajano De, Boldrini, Rafael & Novaes, Marcos Carneiro, 2020, New species of the genus Macrogynoplax and new records of Anacroneuria (Plecoptera: Perlidae) from Roraima State, Brazil, Zootaxa 4722 (5), pp. 463-471 : 468-469

Anacroneuria minuta Klapálek, 1922

Anacroneuria minuta, Klapálek 1922: 89 ; Illies 1966: 319; Kimmins 1970: 345; Ribeiro-Ferreira & Froehlich 2001: 188; Froehlich 2002: 80; Ribeiro & Rafael 2009: 2 ; Ribeiro & Gorayeb 2016: 434; Rippel et al. 2019: 360.

Material examined. BRA, RR, Amajari, Serra do Tepequém, Igarapé Barata, 03°47’07.07”N / 61°45’02.06”W. 16.ii.2016, light trap, 5 males and 2 females, R. Boldrini & L. R . C. Lima ( UFRR). BRA, RR, Cantá, Serra Grande , 02°32’29.02”N / 60°47’53.06”W, 07.x.2015, light trap, 1 male, P. C. S. Barroso & R . Boldrini ( UFRR); 19.x.2016, light trap, 3 males, P. C. S. Barroso & R . Boldrini ( UFRR). A. minuta variant 1 - BRA, RR, Pacaraima, Rio Surumu , 04°15’17.00’’N / 61°02’05.00’’W, 11.x.2015, light trap, 2 males and 4 females, P. C. S. Barroso & R . Boldrini ( UFRR). BRA, RR, Amajari, Rio Acari , Sítio Baixa Da Égua , Região Do Ereu , 04°04’28.10”N / 61°27’09.50”W, 15–17.xi.2018, Pennsylvania trap, 1 male, B. C. Souza ( UFRR); BRA, RR, Alto Alegre, FLONA Roraima, 02° 56’18.05”N / 61°37’27.28”W, 19.xii.2017, light trap, 2 females, R . Boldrini ( UFRR); 20.xii.2017, light trap, 1 female, R . Boldrini ( UFRR); 21.xii.2017, light trap, 1 female, R . Boldrini ( UFRR); 01–15.ii.2018, Malaise trap, 1 male and 1 female, R . Boldrini ( UFRR), 15–30.iii.2018, Malaise trap, 4 males and 1 female, R . Boldrini ( UFRR); 02–17.v.2018, Malaise trap, 3 males and 1 female, R . Boldrini ( UFRR); 01–13.vii.2018, Malaise trap, 1 female, R . Boldrini ( UFRR). A. minuta variant 2 —BRA, RR, Boa Vista, UFRR , Campus Experimental Cauamé ( CCA), 02°51’47.76”N / 60°42’53.89”W, 10.vi.2017, light trap, 32 males and 4 females, R . Boldrini, E. T . Menezes & I. B. Oliveira ( UFRR) .

Measurements data. A. minuta . Female forewing length: 10.5–14.0 mm, n= 02; male forewing length: 7.0–9.0 mm, n= 9. A. minuta variant 1. Female forewing length: 9.1–10.0 mm, n= 12; male forewing length: 7.0–8.0 mm, n= 11. A. minuta variant 2. Female forewing length: 10.0–12.0 mm, n= 4; male forewing length: 8.1–9.0 mm, n= 32.

Remarks. This species occurs in the Roraima State in addition to the states of Amazonas, Pará, and Tocantins. (Rippel et al. 2019). During our sampling, we found two additional morphotypes, with minor variation in the pigmentation of the wing veins Sc and R 1 in A. minuta variant 1 where they vary from hyaline to darker, as well a wider lateral stripe on the pronotum of male. Another variation, detected was the subgenital plate of female with only two lobes in A. minuta variant 2, whereas four lobes in A. minuta variant 1 and typical A. minuta . The apex of the penis is bifid in A. minuta variant 1 and 2.

A. minuta variant 1— Male forewing length: 7–8 mm, length: 7 mm, penis length 0.07 mm and 0.03 mm width. Penis conical same as the previous species. Regularly curved hooks, with pointed apex, slightly shorter than the previous species. In lateral view, the dorsal keel is apparently shortened and spiculated. In ventral view, there are two of small membranous vesicles. The penis apex is short and tapered in lateral view with apex bifurcate in dorsal view. Wings with darker veins, except costa. Subgenital plate is wide with four undulating lobes, and the medial notch is deeper than the submedial notches.

A. minuta variant 2— length 9 mm, penis length 0.07 mm and 0.03 mm width. Penis: generally conical according to previous species. Regularly curved hooks, with pointed apex, slightly shorter than A. minuta , but similar to A. minuta variant 1. In lateral view, there is a slight depression in front of the dorsal keel, discernably spiculated and bifid. In ventral view, there are two small membranous vesicles. The apex of the penis is short and acute in lateral view. The bifuricate apex of the penis in dorsal view similar to A. minuta variant 1. Subgenital plate is wide with two lobes, with a deep medial notch.