Macrogynoplax quadrispina, Menezes & Boldrini & Novaes, 2020

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 : 465

Macrogynoplax quadrispina n. sp.

( Figs. 2 A–E)

Material examined. Holotype male: BRAZIL ( BRA), Roraima State ( RR), Municipality of Amajari, Serra do Tepequém, Igarapé Cocal , 03°45’12.00”N / 61°42’42.00”W, 03–13.xi.2017, Malaise trap, R. Boldrini ( INPA) . Paratypes: same locality, 03–13.xi.2017, Malaise trap, 1 male; 13–23.xi.2017, Malaise trap, 1 female, R . Boldrini ( UFRR).

Description. General color pale yellow in ethanol. Head with M-line not distinct; gena light brown; maxillary and labial palps light brown; antennae dark yellow, with scape and pedicel light yellow; compound eyes dark and with inner margin not pigmented; ocelli with narrow dark ring ( Fig. 2A ). Coxa and trochanter pale yellow, first and third pair of legs with entirely brown tibia and femur. Wings yellow with veins darker except veins Sc. Cerci dark yellow.

Male. Forewing length 9.8–10.2 mm (n= 2). Ninth sternite with a pair of basolateral protuberances; hammer U-shape ( Fig. 2E ). Penial amature with ventromedial membranous bowl-shaped section, with of four hooks, one pair lateroapically smaller and tapered, other pair posteriorly laterally longer and thicker with spines at the apex; the apex of the hooks are darkly sclerotized ( Figs. 2 B-D).

Female. Forewing length 12.6–13.0 mm (n= 1). Head larger than the male, coloration similar to male. Subgenital plate notched, not reaching beyond the posterior margin of the sternum 9. The lateral bars are fused to the sternum 9.

Nymph. Unknown.

Remarks. Specimens have faded in ethanol. The presence of four penial hook-like structures is unusual and unique among the known species of Macrogynoplax , easily distinguishing the male of the new species from all other described species.

Etymology. From word combination of the Latin quadr and spin, for the four hooks of the penial amature.

Figures

FIGURES 2A–E. Macrogynoplax quadrispina n. sp. Holotype, male adult. 2A, head and pronotum; 2B, penial armature (dorsal view); 2C, penial armature (ventral view); 2D, penial armature (lateral view); 2E, Sternum IX with hammer.