Itauara mangaratiba, Alves & Dumas & Nessimian & Santos, 2023

Alves, André Almeida, Dumas, Leandro Lourenço, Nessimian, Jorge Luiz & Santos, Allan Paulo Moreira, 2023, Born from rock: eight new species of Itauara Müller, 1888 (Trichoptera: Glossosomatidae) from southeastern Brazil, including phylogenetic and distributional comments on the genus, European Journal of Taxonomy 885, pp. 99-133 : 116-118

Itauara mangaratiba sp. nov.

urn:lsid:zoobank.org:act:A3E06D5A-B50A-4DB5-8A60-DAD0EC3F27F4

Fig. 7

Differential diagnosis

This species belongs to the amazonica species group, being recovered as sister group to a clade including I. cristata sp. nov., I. caparao sp. nov., I. bispinata sp. nov., and the brasiliana species group. This new species is similar to I. alexanderi Robertson & Holzenthal, 2011 , I. emilia Robertson & Holzenthal, 2011 , and I. lucinda Robertson & Holzenthal, 2011 , each with tergum X presenting a dorsomesal process that is downturned in lateral view, and with similar ventrolateral processes. However, in I. mangaratiba sp. nov., the lower lobe of ventrolateral process is globose ( Fig. 7A ) and in those other species it is subquadrate or subtriangular. Moreover, the new species can be recognized by the phallicata, which is slightly sinuous along its length ( Fig. 7A ); by the apical portion of parameres being slightly outward and downturned ( Fig. 7A, C ); and by the inferior appendages undivided at apex ( Fig. 7C ).

Etymology

The specific epithet, used as a noun in apposition, refers to the locality where the holotype specimen was collected. The name ‘Mangaratiba’ comes from the Tupi-guarani language and means “place where there are mangarás”. Mangará or mangarito is an edible plant ( Xanthosoma sp. , Araceae ), similar to taro, that used to be consumed by indigenous people in this region.

Material examined

Holotype BRAZIL • ♂; Rio de Janeiro Mangaratiba, Serra do Piloto, Parque Estadual Cunhambebe , Pousada Mirante Imperial , afl. 1ª ordem do Rio do Saco ; 22°54′15.3″ S, 44°01′20″ W; alt. 197 m; 13–15 May. 2017; L.L. Dumas, J.L. Nessimian, A.L.D. Ferreira and J.F. Barbosa leg.; DZRJ 7645 .

Paratype BRAZIL • 1 ♂; same collection data as for holotype; DZRJ 7644 .

Description

Adult

Length of each forewing 2.7–2.8 mm (n = 2). Head, thorax, and appendages, in alcohol, light brown. Forewings covered with brown setae, slightly broad after anastomosis, with anterior and posterior margins approximately parallel, apex subacute; forks I, II, and III present; Sc and R1 veins not fused; fork I sessile; forks II and III petiolate, with stem longer than fork; Cu1 vein complete, reaching wing margin; Cu1 and Cu2 veins intersecting near of anastomosis; Cu2 vein with row of erect setae; A3 vein absent; crossveins constituting relatively straight transverse line; Rs vein and discoidal cell approximately of same length. Hind wings with margins approximately parallel, with apical portion tapered; forks II and V present; Sc and R1 vein converging near to wing margin; A2 vein absent. Spur formula 1, 4, 4, foretibial spur reduced and hair-like. Segment VI with digitate process, with acute apex.

Male genitalia

Preanal appendages absent. Segment IX ventrally narrow, broad medially; anteroventral margin sinuous; posterolateral margin slightly sclerotized. Tergum X partially fused to tergum IX; dorsomesal margin with single, downturned, elongate process ( Fig. 7A–B ); dorsolateral margin without processes; ventrolateral margin with paired flange-like setose processes, with upper subtriangular lobe and lower globose lobe. ( Fig. 7B ). Inferior appendages present as single, broad process, broader basally, with rounded apex bearing long setae, and with pair of small digitate lobes ventrolaterally, each bearing a seta ( Fig. 7A, C ). Parameres present, paired, inserted in membranous lobe, arising laterally from endotheca, sclerotized and rod-like, long, sinuous, with apical portion ventrally directed ( Fig. 7A ), and slightly outward ( Fig. 7C ), apices pointed. Phallobase reduced, slightly sclerotized. Phallicata forming moderate-sized, slightly sinuous, sclerotized, dorsal sheath extending from phallobase, with subacute apex ( Fig. 7A ). Endophallus membranous, enlarged, and convoluted, divided into upper and lower lobe ( Fig. 7A ).

Female and immatures

Unknown.

Distribution

Brazil [state of Rio de Janeiro (municipality of Mangaratiba)]

Figures

Fig. 7. Itauara mangaratiba sp. nov., holotype (DZRJ 7645), male genitalia. A. Lateral view. B. Dorsal view. C. Ventral view. Scale bar = 0.1 mm.