Xiphocentron (Antillotrichia) maracanan Vilarino, Cavalcante, Dumas & Nessimian 2018

Vilarino, Albane & Bispo, Pitágoras C., 2020, New records and two new species of Xiphocentron Brauer 1870 (Trichoptera Xiphocentronidae) from southern Atlantic Forest, Brazil, Zootaxa 4851 (2), pp. 386-400 : 396-397

Xiphocentron (Antillotrichia) maracanan Vilarino, Cavalcante, Dumas & Nessimian 2018

Figs 27–31 , 32–38 , 39

Material examined. BRAZIL— Bahia: 1♂ ( UFBA) Varzedo: Faz. Baixa da Areia ; Malaise trap; 9.iv.2015; ES Dias & R Campos leg. 10♂♂ ( UFBA) Camacan: Serra Bonita ; 15°23′2″S, 39°33′56″W; 820 m; Malaise I;. iv.2011. Espírito Santo : 1♂, 1♀ ( DZRJ) Pinheiros: Reserva Biológica Córrego dos Veados, Riacho Água Limpa ; 10.ii.2009; APM Santos leg. 1♂ ( DZRJ) Domingos Martins: Pedra Azul, Rota do Lagarto ; 20º23′36″S, 41º01′01.2″W, 1170 m; 31.iii.2011; LL Dumas , CA Jardim leg. Minas Gerais: 6 ♂♂, 13♀♀ ( UFMG) Nova Lima: Mata , 19°58′7.4″S, 43°51′22.7″W, 29.xi–13.xii.2015; Malaise trap; AR Lima leg. Rio de Janeiro: 1♂ ( DZRJ) Itatiaia: Penedo , afluente do rio das pedras; S22º25′02″, W44º32′50″, 689 m; 06.iii.2008; LL Dumas, MR de Souza, RB Braga, JL Nessimian leg. 1♂ ( DZRJ) Rio de Janeiro: Parque Nacional da Tijuca ; S22°56′48.9″, W43°17′32.3″; 11.x.2014; BM Silva, LL Dumas, JL Nessimian , KA Estevão & F Quintarelli leg.

Distribution. Brazil (Bahia [new record], Espírito Santo [new record], Minas Gerais [new record] and Rio de Janeiro states) ( Fig. 39 ).

Remarks. Xiphocentron maracanan can be differentiated from its congeners by the posterior margin of tergum IX, which has acute lobes separated by a deep V-shaped incision ( Figs 32, 35, 37 ); and the inferior appendage with an angulate, elbow-shaped region covered with small spines on the inner face, and bearing a small mesal sclerite ( Figs 33, 34, 36, 38 ).

Some variations were found in the specimens studied. The morphotypes from Bahia state (forewing length 3.6–3.7 mm) have a slightly broader preanal appendage than the morphotypes collected in other states ( Figs 32–34 ). The morphotype from Espírito Santo state (forewing length 3.7 mm) has the inferior appendage slightly shorter ( Fig. 36 ). Some specimens from Espírito Santo and Minas Gerais states have a narrowing region immediately beyond the nygma in forewing fork II ( Figs 29–30 ), in Minas Gerais state (forewing length 3.4–3.5 mm), in the same location, specimens with and without the narrowing region in fork II were found, showing that there is a variation in this character. This narrowing region forming a small cell enclosing the nygma on the forewing was described for X. acqualume , X. jaguare , X. steffeni , and X. ilionea and is also present in some Oriental species of Cnodocentron ( C. brogimarus Malicky & Chantaramongkol 1992 , C. tchaturbhuja Schmid 1982 , and C. vrisaparvan Schmid 1982 ).

Figures

FIGURE 39. Geographical distribution of the new species and analyzed species, including new records.

FIGURES 27–31. Xiphocentron maracanan Vilarino et al. 2018, wings: 27–28, specimen from Bahia state: 27, right wings, venation, dorsal; 28, right forewing photograph, dorsal. 29–30, specimen from Espírito Santo state: 29, detail of right forewing venation variation, dorsal; 30, right forewing photograph, dorsal. 31, specimen from Minas Gerais state, right forewing photograph, dorsal.

FIGURES 32–38. Xiphocentron maracanan Vilarino et al. 2018 male, genitalia variations: 32–34, specimen from Bahia state: 32, dorsal; 33, ventral; 34, left lateral. 35–36, specimen from Espírito Santo state: 35, tergum IX, dorsal, 36, genitalia, left lateral. 37, 38, specimen from Bahia state photographs: 37, tergum IX, dorsal; 38, left inferior appendage, left lateroventral view. Arrows highlight diagnosable structures.