The tropical African genus Morgenia (Orthoptera, Tettigoniidae, Phaneropterinae) with emphasis on the spur at the mid tibia Author Massa, Bruno Department of Agricultural, Food and Forest Sciences, University of Palermo, Viale Scienze Bd. 5 A, 90128 Palermo, Italy bruno.massa@unipa.it Author Heller, Klaus-Gerhard Grillenstieg 18, 39120 Magdeburg, Germany Author Warchalowska-Śliwa, Elzbieta Institute of Systematics and Evolution of Animals, Polish Academy of Sciences, Slawkowska 17, 31515 Krakow, Poland Author Moulin, Nicolas Route de l'Ecole, 82, Hameau de Saveaumare, 76680 Monterolier, France text Deutsche Entomologische Zeitschrift 2018 2018-08-02 65 2 161 175 http://dx.doi.org/10.3897/dez.65.26693 journal article http://dx.doi.org/10.3897/dez.65.26693 1860-1324-2-161 196D0BD954A1481181D4B714B6B2BEEE 22E30A28F3F95FB0848C3A58737B1CE9 1343164 Morgenia lehmannorum Heller & Massa sp. n. Figs 4 , 12 , 22 , 30 , 39 , 40 Material examined. Uganda , Semliki Forest National Park ( 00°49 '30" N , 30°03 '40" E ) 1-31.VIII.2014 , A. and G. Lehmann ( ♂ holotype ) (MfN) . Distribution. Presently known only from the type locality, Semliki Forest (Uganda). Colour. Green, with the exception of tympana of fore legs that are brown and one black spot between tympana. Stridulatory area brownish. Black spots at the base of tegmina. Description. Males. Head and antennae. Fastigium of vertex narrow, sulcate above, not contiguous with fastigium of frons. Eyes rounded, well projecting. Legs. Fore coxae armed with a fine spine. Fore tibiae furrowed on upper margin, distinctly widening above tympanum, conchate on inner, open on outer side. Fore femora armed on inner ventral side with 4 small spines, fore tibiae with 2 spines + 1 spur on inner ventral side and 1 spine + 1 spur on outer ventral side, mid femora unarmed, mid tibiae with 2 outer and 2 inner ventral spines, inner ventral spur of mid tibiae long, up-curved, exceeding 3/4 of the first tarsal article; its length is about 10% the length of tibia. On the outer ventral margin of mid tibiae, three close short spines are present (Fig. 30 ). Hind femora armed with 3 small spines on outer and 3 on inner ventral sides, hind tibiae with many spines on ventral and dorsal sides + 3 spurs on each side. Thorax. Pronotum narrowing at the level of the humeral sinus, flat above, lateral margins rounded, anterior margin straight, posterior rounded, humeral sinus well developed, lobes of pronotum rounded. Tegmina narrow with rounded apices (Figs 4 , 12 , measurements in Table 1 ), wings longer than tegmina. Stridulatory area of the left tegmen raised (Fig. 12 ). Mirror of the right tegmen smaller than in M. hamuligera (Fig. 12 ). Pattern of costal area of tegmina with a net of small cells; stridulatory file 1.8 mm long, arched and composed of ca. 100 teeth; the distal teeth of the stridulatory file are more widely spaced than the proximal ones, that are also more densely set together (Fig. 22 ). Cerci club-shaped with an apical spine, the inner part is concave, the outer rounded. Subgenital plate with a small apical concavity in ventral view with tips straight in lateral view (Figs 39 , 40 ). Diagnosis. M. lehmannorum sp. n. is characterised by narrow tegmina (Table 1 ), club-shaped cerci, a long and up-curved spur on the mid tibia, the stridulatory area brown, the costal area of tegmina with a net of small cells and the stridulatory file that is 1.8 mm long, arched and composed of ca. 100 teeth, the distal teeth are more widely, the proximal ones more closed set. Differences to other species of the genus are summarised in Table 2 . Table 2. Main characters that allow the separation of males of the eight species of the genus Morgenia .

-	Spot on stridulatory area	Costal area of tegmina	Stridulatory file	Cerci	Subgenital plate (ventral)	Subgenital plate (lateral)	Spur of mid tibia
Morgenia hamuligera	Blackish, rectangular (Figs 9 , 54 )	Spaced crossveins (Fig. 13 )	3.5 mm long (80 dense + 70 widely spaced teeth) (Fig. 20 )	Club-shaped (Fig. 37 )	Widely concave (Fig. 37 )	Rather straight (Fig. 38 )	Long and pointed (Fig. 27 )
Morgenia rubricornis	Blackish, triangular (Figs 10 , 14 )	Spaced crossveins (Fig. 10 )	2.2 mm long (60 dense + 50 widely spaced teeth) (Fig. 20 )	Club-shaped (Fig. 35 )	Widely concave (Fig. 35 )	Tips up-curved (Fig. 36 )	Long and more or less up-curved (Fig. 28 )
Morgenia spathulifera	Very few small spots on tegmina (Fig. 11 )	Net of small cells (Fig. 11 )	1.2 mm long (60 densely spaced teeth) (Fig. 23 )	Club-shaped (Fig. 43 )	Concave, interior margins undulate (Fig. 43 )	Rather straight (Fig. 44 )	Very short and up-curved (Fig. 32 )
Morgenia plurimaculata sp. n.	Few scattered spots on tegmina in most specimens (Figs 15 , 55 )	Net of small cells (Fig. 15 )	2.8 mm long (90 widely spaced teeth) (Fig. 21 )	Club-shaped (Fig. 41 )	Widely concave (Fig. 41 )	Tips down-curved (Fig. 42 )	Short and pointed (Fig. 29 )
Morgenia lehmannorum sp. n.	Very few (Figs 12 , 56 )	Net of small cells (Fig. 12 )	1.8 mm long (ca. 100 teeth, distal more widely spaced than proximal) (Fig. 22 )	Club-shaped (Fig. 39 )	Small apical concavity (Fig. 39 )	Rather straight (Fig. 40 )	Long and up-curved (Fig. 30 )
Morgenia angustipinnata sp. n.	Very few, brownish (Fig. 16 )	Net of small cells (Fig. 16 )	1.7 mm long (70 widely spaced teeth) (Fig. 24 )	Club-shaped (Fig. 45 )	Long and narrow, small concavity, interior margins undulate (Fig. 45 )	Rather straight (Fig. 46 )	Very short and up-curved (Fig. 31 )
Morgenia melica	Blackish, more or less square (Fig. 17 )	Spaced crossveins (Fig. 17 )	2.3 mm long (70 widely spaced teeth) (Fig. 25 )	Slender, apically flattened (Fig. 47 )	Widely concave, tips divergent (Fig. 47 )	Tips up-curved (Fig. 48 )	Long and pointed (Fig. 33 )
Morgenia modulata	Very few, nearly absent (Fig. 18 )	Spaced crossveins (Fig. 18 )	3.0 mm long (100 dense, + ca. 20 widely and ca. 30 evenly spaced) (Fig. 26 )	Slender, apically flattened (Fig. 49 )	Widely concave with right base (Fig. 49 )	Tips gently up-curved (Fig. 50 )	Long but enclosed inside the tibia (Fig. 34 )

Etymology. We have the pleasure to dedicate this species to the German orthopterologists Arne and Gerlind Lehmann, who collected the only known specimen.