Arantia (Euarantia) marmorata Karsch, 1889

Hemp, Claudia & Massa, Bruno, 2017, Review of the African genera Arantia Stål and Goetia Karsch (Orthoptera: Tettigoniidae: Phaneropterinae), Zootaxa 4362 (4), pp. 451-498 : 476-478

Arantia (Euarantia) marmorata Karsch, 1889 ( Figs. 28 , 60 , 91 )

http://lsid.speciesfile.org/urn:lsid: Orthoptera .speciesfile.org:TaxonName:464798

Karsch (1889). Berlin Ent. Z., 32: 433, 435.

Type locality: DEMOCRATIC REPUBLIC CONGO. Depository: MZPW, Warsaw . Kind of type: holotype female. Material examined: CENTRAL AFRICAN REPUBLIC. Dzanga-Ndoki National Park, Lac 1, 20–23.II.2012 (light trap), P. Moretto (♂) ; 14–15.II.2012 (light trap), P. Moretto (♂) (BMCP).

Measurements. Males. Body length: 34–35.7; pronotum length: 7.0–7.3; pronotum height: 6.8–7.3; hind femur: 33.9–34.5; hind tibiae: 38.5–38.8; tegmina: 4 6–47.4; tegmina width: 16.9–17.5; tegmina width/pronotum length: 2.4. Female (according to Heller et al. 2014): tegmina width: 22; tegmina width/pronotum length: 2.8.

Characters. A. marmorata is a medium-sized species (body length ♀ 33 mm) ( Fig. 28 ). Karsch (1889) described only the female. It is yellow-greenish, characterized by rather broad tegmina, with veinlets forming hexagons, and black spots on the base of tegmina, below the pronotum. Fore femora are armed with 3 inner ventral spines. A. marmorata has one broad-based spine on both sides on the hind femur ( Karsch 1889). Lateral lobes of the ovipositor have a pointed protuberance.

Description of the male. Comparatively large with broad, leaf-like tegmina. General habitus and colour pattern. On tegmina many dark spots and maculae. Hind femora ventrally with two broad-based spines. First two antennal segments yellowish, others green, with black rings. Head and antennae. Eyes round, fastigium of vertex sulcate. Face with reddish tinge. Thorax and legs. Tympana of fore tibiae open on outer side, closed on inner side, dark. Pronotum green or yellow with green lines, metazona yellowish. Anterior margin of pronotum slightly concave, posterior margin rounded. Lower margin of pronotal lobes lacks concavity present usually in other species of the genus. Tegmina are 2.5–2.7 times longer than broad, oval, green with a dark stripe at the base and numerous scattered dark maculae. The stridulatory file on left tegmen is slightly curved and narrow, with 95–100 teeth ( Fig. 60 ). Fore coxae unarmed. Fore femora with 4 inner ventral spines, fore tibiae with 5–6 inner and outer ventral spines, and 2–3 dorsal spines. Mid femora with 1–2 outer ventral spines near the joint of the tibia with the femur, mid tibiae with 11–12 outer ventral spines, 6–7 inner ventral spines, and 6–7 outer and inner dorsal spines. Hind femora with 7 outer and 5 inner ventral pines, the last two broad-based and black-tipped. Hind tibiae curved, with 16–18 outer spines and 12–13 inner ventral spines. Abdomen. Cerci are long, up- and in-curved, stout with a central narrowing, and a spoon-like expanded apex and a sclerotized apical spine ( Fig. 91 ). Subgenital plate is triangular, tricarinate, with a straight apex and two small styli.

Remarks. Karsch (1890) separated A. marmorata from A. latifolia because of the slightly different shape of the posterior margins of the tegmina, the wide dark stripe at the base of tegmina and a different spination. However, differences between A. marmorata and A. latifolia consist in tegmina width (width tegmina/length pronotum in marmorata 2.8, in latifolia 2.3) and especially in the male cerci. Typical are the male cerci, which are spoon-like expanded at the tips, lacking a subapical process present e.g. in A. congensis . It also is morphologically related to A. congensis and A. melanota .

Distribution. Central Africa ( Democratic Republic of the Congo, Central African Republic).

Figures

FIGURES 26–29. Habitus of Arantia (Euarantia) latifolia (26), A. (Euarantia) ovalipennis (holotype) (27), A. (Euarantia) marmorata (holotype) (28) and A.(Euarantia) congensis (29).

FIGURES51–62.Stridulatory files of Arantia brevipes (51), Arantia ivoriana n. sp. (52), Arantia simplicinervis (53), Arantia quinquemaculata n. sp. (54), Arantia fasciata from Mt. Kilimanjaro (55), Arantia fasciata from South Africa (56), Arantia rectifolia (57), Arantia tanzanica n. sp. (58), Arantia regina (59), Arantia marmorata (60), Arantia congensis (61) and Arantia melanota (62).

FIGURES 85–95. Cerci of Arantia fasciata from South Africa (85a) and Tanzania (85b), Arantia regina (86, 87), Arantia rectifolia (dorsal and lateral view) (88a, 88b), Arantia incerata (lateral and dorsal view) (89a, 89b), Arantia latifolia (90), Arantia marmorata (91), Arantia congensis (92), Arantia melanota (93a, 93b), Arantia mauritiana (94) and Arantia retinervis (95a, 95b).