Arantia (Euarantia) bispinosa, Hemp & Massa, 2017

Hemp, Claudia & Massa, Bruno, 2017, Review of the African genera Arantia Stål and Goetia Karsch (Orthoptera: Tettigoniidae: Phaneropterinae), Zootaxa 4362 (4), pp. 451-498 : 482

Arantia (Euarantia) bispinosa n. sp. ( Figs. 33 , 68 , 84a, b )

http://lsid.speciesfile.org/urn:lsid: Orthoptera .speciesfile.org:TaxonName:500643

Material examined and depository. IVORY COAST. Taï National Park, Res. Station 18.III.2017 (light trap), B. Massa (1♂ holotype, 1♂ paratype) ( BMCP).

Measurements. Body length: 31.4–32.1; pronotum length: 6.4–6.6; pronotum height: 5.6–5.7; fore femur: 11.5–12.0; mid femur: 13.0–13.2; hind femur: 31.1–32.2; hind tibiae: 35.4–37.0; tegmina length: 42.8–44.6; length of hind wings: 46.8–48.5; tegmina width: 12.0–12.5; tegmina length/width: 3.6–3.9; tegmina width/pronotum length: 1.9.

Diagnosis. Arantia bispinosa n. sp. is a large-sized (♂ 31–32 mm) species, with the base of tegmina black. Very peculiar are two spines at the inner base of the cerci with a sclerotized ridge that stretches along the inner side of the cercus. It is also characterized by long femora (see measurements). We placed it within the subgenus Euarantia , but as in the case of A. rectifolia , the width of tegmina is intermediate between Arantia and Euarantia .

Description. Male ( Fig. 33 ). General habitus and colour. Predominantly yellow-green, leaf-like. Antennal segments reddish. Pronotum yellow, legs yellow, except for hind tibiae that are green. Base of tegmina black. Head and antennae. Eyes oval-roundish, antennae long and very thin, 64.5 mm. Thorax and legs. Fore coxa unarmed. Tympana on fore tibiae open on outer, closed on inner side. Anterior margin of pronotum straight, posterior margin rounded. Lower margin of pronotal lobes with a concavity. Tegmina oval, green with a dark stripe at the base, 3.6 times longer than broad. The stridulatory area of the left tegmen is almost straight, the stridulatory file is arcuate, narrow and consists of less than 40 teeth ( Fig. 68 ). Fore femora with 6 inner ventral spines, fore tibiae with 7 inner ventral and 6 outer ventral spines. Mid femora with 2 outer ventral spines, mid tibiae dorsally with 5 outer and inner spines, 12 spines on outer and inner ventral margins. Hind femora with 5 outer and 4 inner ventral spines, hind tibiae slightly curved, with many ventral spines. Abdomen. Cerci are long and in-curved, with an acute small spine at the inner dorsal base, and an inner sclerotized ridge that stretches from the mid to the apex of the cerci; the ventral base of the cerci is circlic expanded with an apical brown chitinous margin ( Figs 84a, 84b ). Subgenital plate is triangular, the apex is straight and styli are present ( Fig. 84a ).

Female. Unknown.

Etymology. Named for the presence of two spines at the inner dorsal base of cerci.

Affinities. Cerci with a circlic expanded process at the base of the cerci together with a acute small spine dorsal at the base is unique so far for Arantia .

Distribution. Known only from the type locality, the Taï National Park ( Ivory Coast).

Figures

FIGURES 30–33. Habitus of Arantia (Euarantia) melanota (holotype) (30), A. (Euarantia) mauritiana (holotype) (31), A. (Euarantia)retinervis (syntype) (32) and A.(Euarantia) bispinosa n. sp. (holotype) (33).

FIGURES63–71.Stridulatory files of Arantia retinervis (63), Arantia excelsior (64), Arantia scurra(65), Arantia tibiaspinosa n. sp.(66), Arantia griffinii n. sp. (67), Arantia bispinosa n. sp.(68), Arantia galbana (69), Arantia dimidiata (70) and Arantia purpurea (71).

FIGURES72–84.Cerci of Arantia angustipennis (72a) and original drawing of Chopard (1954) (72b), Arantia ivoriana n. sp. (dorsal and ventral view) (73a, 73b), Arantia fatidica (dorsal and lateral view) (74a, 74b), Arantia brevipes (75), Arantia dentata (76), Arantia orthocnemis (77), Arantia manca(lateral and dorsal view) (78a, 78b), Arantia gracilicercata (dorsal and lateral view) (79a, 79b), Arantia hydatinoptera (80), Arantia leptocnemis (81), Arantia simplicinervis (82), Arantia quinquemaculata n. sp. (83a, 83b), and Arantia bispinosa n. sp. (dorsal view and lateral view of left cercus) (84a, 84b).