The “Themis Group” of Euphaedra Hübner, [1819] in Angola. Revision and description of one new species (Lepidoptera: Nymphalidae, Limenitidinae)

New data are presented relatively to the Euphaedra Hübner, [1819], subgenus Euphaedrana Hecq, 1976 of the “group themis ” in Angola. Four species are assigned being one of them described as new with base on specimens from the Cabinda Territory.


Introduction
Euphaedra Hübner, [1819] is an exclusively Afrotropical genus known by ca. 200 species, especially diversified in the Central African forests. It is known from eight subgenera (HECQ, 1997(HECQ, , 1999 based in the male genitalia features (aedeagus cornuti and valves apex) subgenus Euphaedrana Hecq, 1976 being the most diverse. This subgenus includes five species groups being the "themis-group" characterized by a reddish area at the base of the hindwing verso -a similar area may occur also on the base of the forewing verso and, less frequently, on the wings recto. At the forewing verso there are two medio-cellular black spots, one on the base of costal and subcostal spaces and, often, a third one on the cell basal area; incidentally, the hindwing red spot may be overlaid by black scales and/or the forewing red area may attenuate or disappear. The hindwing verso shows an entire row of submarginal black spots.
The "themis group" was considered to integrate half a dozen lineages and was already reported from Angola by E. eberti Aurivillius, 1896 and some non-valid or not identified subspecies reported as E. themis (Hübner, [1807]). The reference to the former species for the country is confirmed upon one such BACELAR (1956) re-examined specimens; the same happens with one specimen she-was B 0 or 1 identified as E. themis adonina (Hewitson, 1865), today E. adonina spectacularis Hecq, 1997. The nominate subspecies of E. permixtum (Butler, 1873) is recorded, and one new species is described.

Material and methods
All the examined specimens are housed in to the Natural History and Science National Museum in Lisbon (MUHNAC) though they were originally deposited in distinct entomological collections: in the now Centro de Zoologia of the Instituto de Investigação Científica Tropical (CZ), plus in the private collection of Passos de Carvalho (PC) and of the second co-author (BS), this last one integrating specimens caught by A. Figueira (AF). All the samples from Cabinda were obtained by Laura Malheiro da Silva more than six decades ago. If no collector is assigned, the specimens were obtained by the owners of the integrated collections. All the specimens were collected n forest.
The following abbreviations will be also used along the text: CAR: Central African Republic; CDR: Congo Democratic Republic; E: East, eastern; FW: Forewing; HW: Hindwing; N: North, northern; nn: not numbered sample; R: Dorsal surface, recto; V: Ventral surface, verso; W: West, western; WL -FW length measured from apex to the insertion in the thorax.
All the studied specimens were collected in forests close to the following localities (coordinates according to MENDES et al., 2013): CABINDA -Buco Zau (04º46'S, 12º34'E, 50 m); KWANZA NORTE -Cassoalala (09º29'S, 14º22'E, < 50 m); Maria Teresa / Dondo (09º41'S, 14º26'E, ca. 100 m); Nova Oeiras (09º28'S, 14º27'E, ca. 100 m); KWANZA SUL -Roça Rio Bimbe (11º05'S, 14º13'E, 300-400 m); UIGE -Inga (07º18'S, 14º25'E, ca. 600 m). Material examined: CABINDA, Buco Zau, 1 0 (CZ-nn), 25-VII-1952. E. eberti (WL: 46 mm for the re-examined specimen) is a variable species which main diagnostic feature concern the reduction of the V reddish basal spot which (almost) lacks on the FW and is reduced and brick on the HW. The FWR post-discal white band is in the specimen examined as less Sshaped than usual and there is no basal spot on this forewings. BACELAR (1956) identifies as E. eberti, 2 11, 1 0 from Buco Zau, as a matter of fact 1 1, 2 00, all revised: one female is E. eberti as registered, but the couple (from 18 and 25 May) actually belongs to E. (E.) mayumbensis, part of a distinct species-group. After HECQ (1997) and D'ABRERA (2004) E. eberti nominate subspecies occurs in N CDR and S CAR only; neither of them took into consideration its BACELAR (1956) reference. A few morphological dissimilarities and the geographical remoteness of the Angolan specimen relatively to the nominate subspecies known range, led us to suspect that the Cabinda population may even correspond to a non-described subspecies. The only other known subspecies, E. eberti hamus Berger, 1940, is restricted to the E CDR and Uganda. (Butler, 1873)  Identification: WL male 41 mm, female 51 mm. FWR with red basal spot well developed, the wing' black discal area occupying all cell, except for the red basal mark. Post-discal band light yellow; in the female it almost attains the costa, becoming narrow in this area; in the male it is ovoid and quite short, reduced to the two most discal spaces. The female FWR green area extends on the anal, cubitoanal and inter-cubital spaces and in the male it is restricted to the two most posterior spaces. V is lightgreen with numerous large black spots and the wings basal areas are red; the double black spot in the FW cell apex is quite close to the predistal light band and the HW blackish marginal band is narrow being the ante-marginal black spots semi-ovoid.

Euphaedra (Euphaedrana) permixtum
Etymology: The species is named according to its eventual closeness to E. permixtum diva Hecq, 1997. Biotope: Forest. Discussion: The re-examined specimens were identified by BACELAR (1956) as E. themis (1 1) and as E. themis ab. permixtum (1 0 -E. permixtum in the handmade label). They seem quite alike the extra-limital E. permixtum diva Hecq, 1997, with which it shares the conspicuous red spot at the FWR base but some conspicuous dissimilarities must be enhanced: in the male of E. divoides sp. n. the shape and reduction of the light yellowish post-discal band are quite distinct from that of the female and in its female the green scaling extends to the inter-cubital FWR space; further, the position of the FWV cell double black spot well separated from the post-discal light band, as well as the clearly wider HWV blackish marginal band are characteristic of the new species. DRUCE (1875) and KIRBY (1904KIRBY ( -1908 ACKERY et al. (1995) and WILLIAMS (2007) as an eventual synonym of E. permixtum diva Hecq, 1982; it was described from "Angola" and may be, rather, also a synonym of the present taxon. Hecq, 1997 (Figs 11-12) Euphaedra (Euphaedrana) adonina spectacularis Hecq, 1997;Union ent. Belges: 66 LT: Zaire Material examined: CABINDA, Buco Zau, 1 0, 18-V-1952 (CZ-nn).

Euphaedra (Euphaedrana) adonina spectacularis
The only re-examined specimen (WL: 49 mm) was identified by BACELAR (1956) as Euphaedra themis f. adonina (Hewitson, 1865) (sex not reported) and corresponds almost exactly to the photo of the CAR 0 presented by HECQ (1997). The subspecies is the only representative of the "justitia subgroup" known to occur in Angola and despite BACELAR (1956) reference it was pointed by HECQ (1997) and by WILLIAMS (2007) as flying from Cameroon to Zaire only. E. adonina reflecta Hecq, 1982 described from Nigeria and considered as a valid subspecies by D'ABRERA (2004) though not figured, was previously considered in the synonymy of the nominate subspecies by HECQ (1997); D'ABRERA (2004) doesn't report, further, E. adonina spectacularis.

Aknowledgements
The authors thank the colleagues Artur Serrano and Ruben Capela by the material suppled, they obtained on the scope of the Project "Inventory of inshore and freshwater invertebrates and small vertebrates (Task ID 208)" founded by the Southern African Science Service Centre for Climate Change and Adaptive Land Management Integrated Science Plan, coordinated by Carmen van Dunen. They, further, thank the late Lieutenant-Colonel António Figueira who offered years ago to the second co-author some specimens of E. permixtum s. s. he collected in the Cassoalala area.  (Butler, 1873), 1, from Roça Rio Bimbe, R. 4. Id, V. 5. Euphaedra (Euphaedrana) permixtum (Butler, 1873), 0 from Nova Oeiras, R. 6. Id, V.