Thraulodes ykamiaba, Nascimento & Castelaci & Hamada, 2021

Nascimento, Jeane Marcelle Cavalcante Do, Castelaci, Luciana Camurça & Hamada, Neusa, 2021, More about Thraulodes Ulmer, 1920 (Ephemeroptera: Leptophlebiidae) from the Brazilian Amazonia: three new species, a new record and a gynandromorph report, Zootaxa 5076 (1), pp. 21-38 : 28-34

publication ID

https://doi.org/ 10.11646/zootaxa.5076.1.5

publication LSID

lsid:zoobank.org:pub:080C633E-63D2-4021-8CA3-75A02D444882

DOI

https://doi.org/10.5281/zenodo.5763267

persistent identifier

https://treatment.plazi.org/id/03AC891A-E860-E057-FABF-2276FC34FA16

treatment provided by

Plazi

scientific name

Thraulodes ykamiaba
status

sp. nov.

Thraulodes ykamiaba n. sp.

( Figs. 1 View FIGURE 1 , 7–8 View FIGURE 7 View FIGURE 8 , 9C View FIGURE 9 )

Diagnosis. Male imago of the new species can be distinguished from the other species of Thraulodes based on the following characteristics: (1) costal membrane basal to bulla with 2–3 very thin cross-veins ( Fig. 9C View FIGURE 9 ); (2) femora with a blackish yellow band on distal 1/3 ( Fig. 7A View FIGURE 7 ); (3) abdominal terga II–VI translucent white, with pair of subtriangular marks medially near posterior margin; ( Figs. 7A–B View FIGURE 7 ); (4) styliger plate with dorsal extension well developed (approximately 1.3 times longer than wide) ( Fig. 8B View FIGURE 8 ); (5) penis lobe without well-developed ear-like projection ( Figs. 8A–D View FIGURE 8 ); (6) lateral pouch present ( Fig. 8D View FIGURE 8 ); (7) penes spines narrow and long (approximately two times longer than the width of the medial region of the penis lobe) ( Fig. 8A View FIGURE 8 ).

Male imago. Body length: 4.7–5.2 mm (n = 9); forewing length: 5.2–5.5 mm; hind wing length: 1–1.2 mm. General coloration yellowish brown, slightly washed with red; some areas translucent.

Head ( Figs. 7A–C View FIGURE 7 ). Blackish brown, with gray marks; cervix grayish. Upper portion of eyes orangish brown; lower portion black. Ocelli whitish, surrounded by black. Antennae with scape yellowish, pedicel brownish, flagellum yellowish brown.

Thorax ( Figs. 7A–C View FIGURE 7 ). Pronotum yellowish brown, posterior margin blackish brown. Mesonotum brownish yellow, sutures grayish brown; scuto-scutellar suture yellowish; scutellum dark brown laterally. Pleurae and sterna yellowish brown, with blackish marks irregularly distributed.

Legs ( Figs. 7A–B View FIGURE 7 ). Whitish yellow; femora with blackish yellow band on distal 1/3, bands slightly washed with red.

Wings ( Figs. 7A View FIGURE 7 , 9C View FIGURE 9 ). Membrane of forewings hyaline, with blackish brown macula around the costal brace and bases of Sc and R; veins yellowish; costal membrane basal to bulla with 2–3 very thin cross-veins and 11–12 cross veins distal to bullae. Membrane of hind wings hyaline, with dark blackish brown macula at base; with 2–3 cross veins; veins whitish yellow.

Abdomen ( Figs. 7A–C View FIGURE 7 ). Tergum I almost entirely blackish, except submedial region yellowish; terga II–VI translucent white, with pair of subtriangular dorsal marks medially near posterior margin; terga II–VII with pair of blackish, rounded isolated spots laterally (one located near anterior margin and the other one near posterior margin); terga II–VI with stigmatic dot anteriorly; terga VII–X yellowish brown, washed with red centrally. Sterna translucent white. Caudal filaments whitish gray, intersegmental joints darker in all segments.

Genitalia ( Figs. 7D View FIGURE 7 , 8A–D View FIGURE 8 ). Styliger plate yellowish translucent, occasionally with reddish marks; triangular; dorsal extension developed (approximately 1.3 times longer than wide), with rounded apex. Forceps whitish; with slight constriction below the middle of segment I. Penes relatively short and wide; apicolateral area not forming ear-like projection; lateral pouch present (best seen in Fig. 8C–D View FIGURE 8 ); inner margins of the lobes almost parallel; each lobe with recurved fold heavily marked, well sclerotized; outer margins of the lobes strongly sinuous; penes spines narrow (approximately with the same width along entire length) and long (approximately two times longer than the width of the medial region of the penis lobe), projected medially and laterally.

Variations. In some specimens the marks on the abdomen are less defined or with slightly different shapes ( Fig. 7C View FIGURE 7 ).

Female imago and nymph. Unknown.

Etymology. The specific epithet ykamiabas is a tribute to the legendary tribe of woman warriors in the Amazon forest. This myth symbolizes the union among the women and celebrates the triumph achieved in the fight for better days, becoming a representation of woman power. This name is used in apposition.

Comments. Thraulodes ykamiaba n. sp. resembles Thraulodes bonito Gonçalves, Da-Silva and Nessimian, 2013 by sharing the abdominal terga II–VI with pair of marks medially near posterior margin, terga II–VII with pair of marks laterally, styliger plate with dorsal extension developed and by the general shape of the penes (relatively short and wide, with inner margins of the lobes almost parallel; each lobe with recurved fold and lateral pouch present, and penis spine narrow and long). However, both species can be differentiated as follows: in T. ykamiaba n. sp. the recurved fold of the penis lobe is heavily marked and well sclerotized, whereas in T. bonito it is subtly marked; the ear-like projection on apicolateral area of the penis lobe is absent in T. ykamiaba n. sp. and present in T. bonito and the penes spines appear to be longer in the new species than in T. bonito . Also, the hindwings in both species can be differentiated as follows: T. yaciara n. sp. has 2–3 cross-veins, while T. bonito has 7–11.

Material examined. Holotype: male imago (light sheet trap), BRAZIL, Rondônia state, Vilhena municipality, Hermes ; 11/IX/2012; (13°12’07.5” S; 60°23’25.1” W); J.M.C. Nascimento; N. Hamada cols ( INPA) GoogleMaps . Paratypes: 8 male imagoes (same data as holotype) (4 in INPA and 4 in MZUSP) GoogleMaps .

INPA

Instituto Nacional de Pesquisas da Amazonia

MZUSP

Museu de Zoologia da Universidade de Sao Paulo

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