Biogeographical and evolutionary aspects of a Guineo-Congolian bushcricket tribe: Revision of the genera Cestromoecha Karsch, 1893 and Poreuomena Brunner von Wattenwyl, 1878, with the description of new species (Orthoptera, Tettigoniidae, Phaneropterinae) Author Hemp, Claudia https://orcid.org/0000-0001-9170-7113 Dept Plant Systematics, Univ. of Bayreuth, Germany claudia.hemp@uni-bayreuth.de Author Massa, Bruno https://orcid.org/0000-0003-2127-0715 Dept of Agriculture, Food and Forest Sciences, University of Palermo, Italy text Deutsche Entomologische Zeitschrift 2021 2021-01-05 68 1 45 79 http://dx.doi.org/10.3897/dez.68.60193 journal article http://dx.doi.org/10.3897/dez.68.60193 1860-1324-1-45 227B739469C5447FB984250DF1ADFBE1 EE57E5591FE3500892459D0CF4FBB496 4435456 Poreuomena africana Brunner von Wattenwyl, 1878 Figs 22-28 Poreuomena africana Brunner von Wattenwyl, 1878. Monographie der Phaneropteriden, 187; type locality: Gabon (MHNG). Material examined. Cameroon ( 1♂ , 1♀ ) (MCNM) ; Cameroon , Campo Ma'an National Park (lowland rainforest) ( 950 m alt.) 10-22. III. 2018 ( UV Cold Cathode Light Trap ), Fotsing , Ishmael , Miles , Safian ( 2♂ in ANHRT; 1♂ in BMPC) ; Gabon , Mikongo ( Rougier ), Mts de Cristal (secondary forest) ( 430 m alt.) 0°29'47"N , 11°10'42"E , 28. VII-12. VIII.2019 ( LepiLED Light Trap ), Albert , Aristophanous , Bie Mba , Derozier , Moretto ( 1♂ ) (ANHRT) ; Gabon , Mts de Cristal National Park , Kinguele 3. XII. 2015 (UV) (BMPC) ; Gabon , M'Bigon 26. I. 1986 , A Pauly ( 1♂ ) (RBINS) . Diagnosis. The 10th abdominal tergite (Fig. 25 ) is similar to that of P. lamottei (Fig. 78 ) - with two lateral processes. However, the male cerci are completely different in P. africana , broader at the base tapering to acute tips of the two branches (Figs 22 , 25 , 28 ) while the male cerci in P. lamottei are simple, expanded into three tips apically (Fig. 78 ). Description. Tegmina about 5.8-5.9 longer than broad. Stridulatory file 0.3 mm long; teeth more widely spaced at inner side, becoming more densely set distally (Fig. 24 ). Fore femora unarmed. Mid femora with 4-5 outer ventral small spines, inner ventral side unarmed. Hind femora only distally with a ventral double row of 2-3 small spines. Fore tibiae with a ventral double row of 4-5 spines; mid tibiae with a ventral double row of 5 spines, hind tibiae with 4 rows of numerous spines and apically 3 spurs on each side. Last abdominal tergite enlarged and apically bilobate and flattened (Figs 22 , 25 , 26 ); cerci basally stout, apically divided into two tips, the inner shorter and incurved, the outer longer, flattened, outcurved and with 5-6 inner dark teeth like a knife (Figs 22 , 25 , 28 ). The subgenital plate is short with two stout lobes with rounded tips (Figs 26 , 27 ). Colour. Small species, uniformly green-yellowish, a little brownish around the stridulatory area (Fig. 23 ) and small black dots on the posterior margins of the tegmina. Measurements (mm) . Males. Body length: 18.5-19.9. Pronotum length: 3.7-3.8. Pronotum height: 2.8-2.9. Length of hind femora: 19.6-19.8. Length of tegmina: 26.5-26.8. Width of tegmina: 4.5-4.6. Figures 22-28. Morphological details of male Poreuomena africana . Drawing Fig. 53 , taken from Brunner von Wattenwyl (1878) ( 22 ), head and stridulatory area ( 23 ), stridulatory file on the underside of the left tegmen ( 24 ), apex in rear view ( 25 ) and lateral view ( 26 ), subgenital plate ( 27 ) and cerci ( 28 ).