Bia decaerulea cayana Simonsen & Penz

Penz, Carla M., Casagrande, Mirna M., Devries, Phil & Simonsen, Thomas J., 2017, Documenting diversity in the Amazonian butterfly genus Bia (Lepidoptera, Nymphalidae), Zootaxa 4258 (3), pp. 201-237 : 213

Bia decaerulea cayana Simonsen & Penz , NEW SSP.

( Figs 4 c–f, 10e, 12)

Diagnostic description. Defined by the following combination of characters: (1) MF DFW white apical ocelli medium-large. (2) MF DFW orange band somewhat diffuse, in M very wide and often extended into the discal cell (fading proximally); orange scales broadly extended proximally along veins, lining cross-veins at the distal edge of discal cell. (3) M DFW iridescent band absent; a glistening sheen is visible across the entire forewing. F DFW blue iridescence well developed but variable; usually extended across the entire DC, diffuse anteriorly; usually visible at the CuA1-CuA2 intersection; below the discal cell, the iridescent area is wide and may spread towards the tornus to meet the edge of the orange band, being similar to that of actorion but wider than in decaerulea decaerulea . (4) M DFW androconial scales on the CuA-CuA1-CuA2 intersection dark brown, matching scale color of surrounding area and intermingled with orange scales. (5) M DHW discal androconial pad dark brown, nearly black, always darker than associated hairpencil. (6) M DHW discal hairpencil dark brown, but lighter in color than discal androconial pad. (7) F VFW ripple pattern less dense than that of M, with the VFW postmedial area showing a more predominantly yellow color and with one or two pale markings sometimes present across DC.

Etymology. The name cayana refers to the locality Cayenne in French Guiana.

Type material. Holotype M ( Fig. 4 c), deposited in the CMNH collection, three labels separated by // and transcribed verbatim: Mana River , Fr. Guiana, May, 1917. Acc. 6008. // 12–18 dissected by C.M. Penz // HOLOTYPE Bia decaerulea cayana Penz & Simonsen, 2017 . Paratypes are listed in Appendix, and Fig. 4 d–f show paratypes (two M, one F) deposited at CMNH. Note variation in the extent of orange coloration on the M DFW.

Distribution and examined specimens. Fig. 12 and Appendix.

Remarks. Males of this subspecies have a more pronounced dorsal glossy sheen (best viewed when the specimen is tilted) than those of the nominal subspecies and decaerulea pallida .

Figures

FIGURE 4. Adults in dorsal and ventral views. Taxon names appear below each set. Bia decaerulea decaerulea: a, male, Brazil, Amazonas, Manacapuru (CMNH); b, female, same locality (CMNH). Bia decaerulea cayana, Simonsen & Penz, new ssp.: c, male holotype, French Guiana, Mana River (CMNH); d, male paratype, same locality (CMNH); e, male paratype, same locality (CMNH); f, female paratype, French Guiana, Oyapok River (CMNH). Bia decaerulea pallida Casagrande & Penz, new ssp: g, male holotype, Brazil, Amazonas, Barcelos, Rio Padauari (DZUP); h, female paratype, Brazil, Amazonas, Barcelos, Rio Padauari (DZUP).

FIGURE 12. Map showing collection localities of Bia species and subspecies (see Appendix). Some close localities are represented by one single dot. Dubious label data, localities that could not be accurately identified or were incomplete (e. g., Brazil, Pará) were not placed on map.