Nyssodrysilla esperanzae, Lanuza-Garay & Rivera & Murgas, 2024

Nyssodrysilla esperanzae View in CoL sp. nov.

( Fig. 1-5 View Fig )

ZooBank:https://zoobank.org/ 950006BE-DA48-4A46-8508-437BC8B2AF41

Holotype, ♀, BRAZIL, Mato Grosso: Aripuanã, Humboldt , 18.iii.1977, H.P. Stockwell leg. ( STRI _ENT_0063-018).

Description of the holotype

Coloration. – Integument mostly dark brown; ventral mouthparts dark brown, except yellowish apex of maxillary palpomere IV and apex of labial palpomere III; yellowish-brown clypeus; labrum brown on posterior 2/3, yellowishbrown on anterior third.Scapedark brown, remaining antennomeres reddish brown. Pronotum with a longitudinal orangish-yellow band on each side.Ventral surface of body reddish brown, except reddish-brown coxae.

Head. – Frons densely, finely punctate; with abundant yellowish-white pubescence not obscuring integument. Vertex and area behind upper eye lobes with abundant yellowish-white pubescence almost obscuring integument, except glabrous area closeto prothorax andsmall centralarea between antennal tubercles and upper eye lobes. Area behind lower eye lobes with abundant yellowish-white pubescence close to eye, pubescence denser from superior third, glabrous close to prothorax. Genae with somewhat abundant yellowish-white pubescence not obscuring integument. Antennal tubercles with pubescence as on frons frontally, pubescence slightly sparser posteriorly. Clypeus covered with abundant yellowish-white pubescence partially obscuring integument. Labrum with yellowish-white pubescence not obscuring integument on posterior 2/3, with long, erect yellowish setae interspersed; anterior third glabrous, except fringe of yellowish-white setae on anterior margin. Gulamentum glabrous except moderately abundant grayish-white pubescence anteriorly. Distance between upper eye lobes 0.31 times distance between outer margins of eyes; in frontal view, distance between lower eye lobes 0.69 times distance between outer margins of eyes. Antennae 2.4 times elytral length, reaching elytral apex at basal quarter of antennomere VI. Scape with sparse grayish-white pubescence not obscuring integument; with a few long, erect blackish setae near apex of ventral surface. Pedicel with grayish-white pubescence not obscuring integument; ventral surface with a few long, erect, thick blackish setae. Antennomeres III-XI with sparse grayish-white pubescence not obscuring integument; with short, erect, thick black setae interspersed ventrally on III-VI, short, thick black setae interspersed dorsally on V-IX,setaedistinctlysparseronIX.

Antennal formula based on length of antennomere III:

– Scape = 0.78. – Pedicel = 0.07. – IV = 0.84. – V = 0.63. – VI = 0.68. – VII = 0.68. – VIII = 0.71. – IX = 0.68. – X = 0.66. – XI = 0.67.

Thorax. –Prothorax 0.51 times wider than long. Well-marked anterior constriction; sides gradually divergent from anterolateral angles to lateral tubercles, then convergent toward posterolateral angles; lateral tubercles located after the base of the posterior quarter, slightly acute. Pronotum densely, finely punctate; with transverse row of coarse punctures posteriorly; with dense, longitudinal orangish pubescence obscuring the integument on each side; central area with sparse yellowish pubescence not obscuring the integument. Prosternum covered with yellowish-white pubescence not obscuring integument; prosternal process narrowed centrally, 0.12 times procoxal width; mesanepisternum and mesepimeron with dense yellowish-white pubescence, partially obscuring integument; mesoventral process not laminiform, 0.51 times mesocoxal width, with sparse yellowish-white pubescence; metanepisternum with dense yellowish-white pubescence partially obscuring integument; metaventrite with sparse yellowish-white pubescence. Metathoracic discrimen complete. Scutellum covered with yellowish-white pubescence not obscuring integument.

Elytra . – Sides slightly widened centrally; apex obliquely truncate with outer angle slightly projected; somewhat abundantly, coarsely punctate on anterior quarter, punctures gradually finer and sparser toward apex on remaining surface; with abundant yellowish-white pubescence partially obscuring integument.

Legs. – Covered with yellowish-white pubescence not obscuring integument; meso- and metatibiae with short, erect, thick black setae interspersed. Metatarsomere I longer than II-III together.

Abdomen. – Ventrites with sparse pale-yellow pubescence.Ventrite 5 about as long as 3-4 together; sides strongly convergent on anterior 2/3, parallel-sided on posterior third; apex widely emarginate; with long dark-brown setae directed backward on apex. Last tergite rounded apically and slightly surpassing apex of ventrite 5.

Dimensions (mm) (Holotype)

– Total length, 4.90;

– Prothoracic length, 0.85;

– Anterior prothoracic width, 1.00;

– Posterior prothoracic width, 1.15;

– Maximum prothoracic width, 1.40;

– Humeral width, 1.55;

– Elytral length, 3.30.

Nyssodrysilla esperanzae sp. nov. can be included in the Key from Bezark & Santos Silva (2023) (modified) as follows:

1. Elytra marbled with small pale-yellow maculae, not vittate. Brazil (Bahia, Minas Gerais, Espírito Santo, Rio de Janeiro, São Paulo, Paraná, Santa Catarina, Rio Grande do Sul), Paraguay............ N. irrorata (Melzer, 1927)

— Elytra not marbled, with or without longitudinal pubescent bands.......................................... 2

2 (1). Elytra lacking longitudinal pubescent bands; with subtriangular yellow pubescent macula on sides of anterior third. Paraguay..................................................... N. humeralis Bezark and Santos-Silva, 2023

— Elytra with or without longitudinal pubescent bands; without subtriangular yellow pubescent macula on sides of anterior third........................................................................................ 3

3 (2). Pronotum with longitudinal orangish pubescent band on each side, without pubescent bands centrally. Brazil (Mato Grosso)................................................................... N. esperanzae sp. nov.

— Pronotum more than two longitudinal pale-yellow pubescent bands........................................ 4

4 (3). Elytra with abundant, longitudinal pale-yellow pubescent bands, without large, subelliptical brownish pubescent macula onsidesofanteriorhalf. Brazil (Rio de Janeiro, São Paulo, Paraná, Santa Catarina, Rio Grande do Sul)............................................................................................. N. vittata (Melzer, 1934)

— Elytra with a few pale-yellow pubescent bands and with subelliptical brown pubescent macula on sides of anterior half. Peru, French Guiana, Bolivia (Pando)........................................ N. lineata Gilmour, 1962 View in CoL

Etymology. – Named in honor of the grandmother of the second author, Ruby Esperanza Centeno Muñoz.

Remarks. – Nyssodrysilla esperanzae sp. nov. is similar to N. humeralis (Bezark & Santos Silva, 2023) . However, the main differences between them are the longitudinal orangish pubescent bands on sides of the pronotum (absent in N. humeralis ), the absence of subtriangular pubescent maculae in N. esperanzae (present in N. humeralis ), and abundance and distribution of integumental pubescence.