Ybytyramoan praeclarum Silveira and Mermudes

Silveira, Luiz Felipe Lima Da & Mermudes, José Ricardo M., 2014, Ybytyramoan, a new genus of fireflies (Coleoptera: Lampyridae, Lampyrinae, Photinini) endemic to the Brazilian Atlantic Rainforest, with description of three new species, Zootaxa 3835 (3), pp. 325-337 : 328-331

Ybytyramoan praeclarum Silveira and Mermudes sp. nov.

( Figs. 1–25 , 47 )

Etymology. praeclarum means remarkable in Latin. Adjective, gender neutrum.

Diagnosis. Body shape ellipsoidal ( Fig. 16 ). Antennal alveolus with antennifer process indistinct. Pronotum widest posteriad ( Figs. 8 , 18 ). Abdominal sterna VI and VII with lanterns anteriorly rounded, straight posteriad, with posterolateral rounded projections (billycock-shaped), almost as long as sterna length, maximum width as wide as 3/4 sterna width ( Figs 19 ).

Description of the male. ( Figs. 1–25 ) Body-shape ellipsoidal. Antennal alveolus with antennifer process indistinct. Antennae with antennomeres from III slightly decreasing in length toward apex up to subapical; apical antennomere slightly longer than subapical. Labrum somewhat straight. Pronotum widest posteriad, semilunar. Elytra almost 4x longer than wide, widest medially. Abdominal tergum IX and pygidium generally exposed. Abdominal sterna VI and VII with lanterns anteriorly rounded, straight posteriad, with posterolateral rounded projections (billycock-shaped), almost as long as sterna length, maximum width as wide as 3/4 sterna width. Pygidium with posterior margin slightly mucronate. Phallum constricted at basal 1/2, sclerotized portion slightly shorter than paramere, with paired subapical, laterally-oriented teeth, and anterior margin straight in dorsal view.

Colour: Body overall dark-brown, except by abdominal sterna VI and VII, which are dark-brown on outer margins and light-yellow on the area around lanterns; and a central light-brown strip on metasternum. Pronotum light-yellow, contour and a central strip on disc dark-brown, sometimes with pair of pink vittae. Elytra dark-brown, outer margins light-yellow except by outer contour, dark-brown.

Immature stages and female unknown.

Biology. Fireflies active from twilight through the first hours of the night, flashing.

Remarks. This species can be easily distinguished from congenders by pronotum widest posteriad and lanterns anteriorly rounded, straight posteriad, with posterolateral rounded projections (billycock-shaped).

Type. Holotype male ( DZRJ). BRAZIL. Rio de Janeiro. Teresópolis, P.N. Serra dos Órgãos, Vale das Antas, 2,000m, GPS S 22.464495, W 43.042886, 1-2/X/2011, Silveira, L, Dias, G. col.

Paratypes (8 males). Same data as holotype ( DZRJ).

Figures

FIGURES 1 – 7. Ybytyramoan praeclarum sp. nov. head. 1, frontal. 2, ventral. 3, dorsal. 4, lateral. 5, posterior. 6, occipital. 7 tentoria detail, frontal. Scale bar 1 – 7 = 1,0 mm.

FIGURES 8 – 12. Ybytyramoan praeclarum sp. nov. 8 – 10 prothorax. 8, pronotum, dorsal. 9 - prothorax, posterior. Note the proendosternite. 10, prosternum, ventral. 11 – 12, allinotum. 11, dorsal. 12, lateral. Scale bar 8 – 12 = 1,0 mm.

FIGURES 13 – 15. Ybytyramoan praeclarum sp. nov. 13, wing. 14, mesoendosternite. 15, metaendosternite. Scale bars 13: 2 mm, 14 – 15 = 0,5 mm.

FIGURES 16 – 25. Ybytyramoan praeclarum sp. nov. 16 – 17, habitus 16, dorsal. 17, ventral. 18, pronotum, dorsal. 19, abdomen, ventral. Note the lanterns shape. 20, pygidium, dorsal. 21, abdominal sternum VIII, ventral. 22, syntergite, dorsal, abdominal sternum IX, ventral. 23 – 25 aedeagus. 23, dorsal. 24, ventral. 25, lateral. Scale bars 16 – 19 = 1,0 mm, 20 – 25 = 0,5 mm.

FIGURES 46 - 47. 46. Ybytyramoan diasi sp. nov., head, frontal view. White arrows: antennifer processes, black arrow: medial indentation of labral anterior margin. 47. Ybytyramoan praeclarum sp. nov., thorax, ventral. Black arrow: metasternal keel. Scale bars 46 = 0. 5 mm, 47 = 1 mm.