Morgenia hamuligera Karsch, 1890

Massa, Bruno, Heller, Klaus-Gerhard, Warchalowska-Śliwa, Elzbieta & Moulin, Nicolas, 2018, The tropical African genus Morgenia (Orthoptera, Tettigoniidae, Phaneropterinae) with emphasis on the spur at the mid tibia, Deutsche Entomologische Zeitschrift 65 (2), pp. 161-175 : 162

Morgenia hamuligera Karsch, 1890 Figs 1 , 9 , 13 , 20 , 27 , 37 , 38

Morgenia hamuligera Karsch, 1890a. Entom. Nachricht. 16: 263.

Morgenia hamuligera Type locality: Kribi (Cameroon) ( MfN, Berlin).

Material examined.

Cameroon, Kribi (holotype ♂) ( MfN) ; Central African Republic, Sangha Special Reserve , Epiphyte 2008 Expedition, Camp 2, 22-23.X.2008 (light) (2♂) , P. Annoyer; Central African Republic, Dzanga-Ndoki National Park , Ndoki, Lakes Region (light) 31.I.-23.II.2012 (10♂) , Sangha 2012 team; Mboki, 24.I.2012 (3♂) , Sangha 2012 team; 35 km S Bangui, env. Salanga, 28-31.XII.2008, J. Halada (1♂) ; Gabon, Lope National Park , SEGC-CIRMF 12.III.2013 (light), N. Moulin (1♂) ; Ivory Coast, Tai Nat. Park , Res. Station 16-20.III.2017 (light), B. Massa (5♂) ; Ivory Coast, Tai Nat. Park , Res. Station 22.III-4.IV.2017 (light) (7♂, 1♀) , P. Moretto (BMPC).

Distribution.

M. hamuligera was the first species described in the genus Morgenia , from Kribi (Cameroon) and later reported from Barombi Station (Cameroon) ( Karsch 1890a, 1890b). Griffini (1906, 1908) recorded it from Fernando Poo (Equatorial Guinea) and Umangi (Democratic Republic of Congo), Ebner (1943) from Fernando Poo and Massa (2013) from Central African Republic. It is here reported from Gabon and Ivory Coast.

Remarks.

The short description by Karsch (1890a) points out the presence of a blackish spot on the stridulatory area of the left tegmen; the shape of this spot is similar to that of M. rubricornis (see below), but its inner margin is more or less rectangular, not triangular, as in Morgenia rubricornis (Figs 9 , 10 , 13 , 14 ). The mirror of the right tegmen is wide (Fig. 9 ). Antennae may be yellowish or reddish. The pattern of the costal area of the tegmina has regularly spaced crossveins (Fig. 9 ). The stridulatory file is 3.5 mm long, arched and composed of ca. 80 dense and evenly spaced teeth in the proximal part, followed by ca. 70 more or less widely spaced teeth in the distal part (Fig. 20 ). The inner ventral spur of the mid tibiae is long and does not exceed the first tarsal article; its length is about 18-20% of the tibia length. On the outer ventral margin of the mid tibiae, three close short spines are present (Fig. 27 ). Cerci are very stout, club-shaped, the ratio tegmina length/width is 4.0 (Figs 37-38 , Table 1).

Figures

Figures 1 - 4. Habitus of the male of Morgenia hamuligera (1), M. rubricornis (2), M. plurimaculata sp. n. (3) and M. lehmannorum sp. n. (4) (left side for the first three species, right side for the fourth species).

Figures 9 - 14. Stridulatory area of left tegmen and mirror of right tegmen of the male of Morgenia hamuligera (9), M. rubricornis (10), M. spathulifera (11), M. lehmannorum sp. n. (12); habitus of M. hamuligera after Brunner von Wattenwyl (1878) (13) and of M. rubricornis after Sjoestedt (1913) (14). Arrow shows the particular net of small cells in the costal area of tegmina of M. spathulifera, present also in M. lehmannorum sp. n.

Figures 19 - 22. Stridulatory file of the left tegmen in the male of Morgenia rubricornis (19), M. hamuligera (20), M. plurimaculata sp. n. (21) and M. lehmannorum sp. n. (22).

Figures 27 - 34. Mid tibia showing the inner spur in the male of Morgenia hamuligera (27), M. rubricornis (28), M. plurimaculata sp. n. (29), M. lehmannorum sp. n. (30), M. angustipinnata sp. n. (31), M. spathulifera (32), M. melica (33) and M. modulata (34).

Figures 35 - 38. Cerci and subgenital plate of male of Morgenia rubricornis (35 lateral, 36 ventral) and M. hamuligera (37 lateral, 38 ventral).