Poreuomena derozierae, Massa, 2023

Massa, Bruno, 2023, Biodiversity hotspot in the Sangha Trinational Protected Area revealed through Orthoptera Tettigoniidae, Zootaxa 5331 (1), pp. 1-67 : 47

Poreuomena derozierae n. sp.

Figs. 27 , 28a–28d

urn:lsid:zoobank.org:act:60DD5669-A7A1-4089-8EB7-7C8302822F35

Material examined. Republic of Congo, Sangha prov. , N-N NP, Bomassa forest (secondary forest) 02°11’58.1”N, 16°11’16.9”E, 17–23.IX.2022, Lepiled Light Trap, V. Dérozier, B. Fouka, A. Kirk-Spriggs, H. Takano (♁ holotypus) ( ANHRT) ; Republic of Congo, Sangha prov. , N-N NP, Mbeli baï (Swamp forest) 02°15’30.4”N, 16°24’39.5”E, 4–10.X.2022, Actinic light trap, V. Dérozier, B. Fouka, A. Kirk-Spriggs, H. Takano (2♁ paratypi) (1♁ ANHRT, 1♁ BMPC) .

Diagnosis. P. derozierae n. sp. is characterized by its green colour, the black wide colour on the stridulatory area, the protruding downcurved apical tergite and upcurved cerci with an inner spine.

Description. Male. Colour. Green coloured with a black wide area on the stridulatory area. Antennae thin, fastigium of the vertex separated from the fastigium of the frons, face smooth, eyes round, prominent. Pronotum with a flat and smooth disc, the anterior margin straight, the posterior margin broadly rounded. Tegmina narrow, ca. 6.3–6.6 times broader than long, stridulatory area of the left tegmen short. The flap of the left tegmen comparatively small, the corresponding flap on the right tegmen of similar size ( Fig. 27 ). Stridulatory file 0.3 mm long, with ca. 40 slightly arched evenly spaced teeth ( Fig. 28d ). Fore coxa armed with a small spine, fore femora with 4–5 small spines on entral inner margins, mid femora with 4–5 small spines on ventral outer margins, hind femora with 2–3 rows of small ventral spines distally. Fore tibiae with tympanum conchate on inner and open on the outer side, with 3–4 small spines on inner margins, mid tibiae with 10–12 small spines on outer and inner margins, hind tibiae with numerous spines and 3 apical spurs on each side. Last abdominal tergite elongate and downcurved with two apical pointed processes, cerci stout, short and apically upcurved, before their tips they have an inner spine ( Figs. 28a, 28b, 28c ). Subgenital plate with a narrow concavity and two parallel pointed processes; styli absent ( Fig. 28c ).

Measurements (mm). Males. Body length: 17.1–17.5; pronotum length: 4.3–4.4; pronotum height: 3.0–3.1; length hind femora: 17.5–18.8; length of tegmina: 26.5–27.6; width of tegmina: 4.0–4.4.

Female. Unknown.

Etymology. Poreuomena derozierae n. sp. is with pleasure dedicated to Violette Dérozier (ANHRT), who organised all the entomological expeditions to Republic of Congo, showing great skill and intuition in collecting insects.

Distribution. Republic of Congo, Nouabalé-Ndoki National Park.

Affinities. Poreuomena derozierae n. sp. is the tenth species of the genus Poreuomena belonging to the group with the bilobate 10 th abdominal tergite ( Hemp & Massa 2021).

Figures

FIGURE 27. Dorsal view of head, pronotum and stridulatory area of the male of Poreuomena derozierae n. sp.

FIGURE 28. Poreuomena derozierae n. sp. a) frontal view of the 10th tergite apex; b) lateral view of last tergites, cerci and subgenital plate; c) ventral view of subgenital plate and cerci; d) stridulatory file under the left tegmen.