Drepanophyllum corrosifolium ugandense Gorochov, 2023

Gorochov, A. V., 2023, New taxa of the subfamily Phaneropterinae (Orthoptera: Tettigoniidae) from Africa: the tribes Otiaphysini and Preussiini, Caucasian Entomological Bulletin (Caucas. entomol. bull.) 19 (1), pp. 23-30 : 25-26

Drepanophyllum corrosifolium ugandense Gorochov , subsp. n.

( Figs 9–11 )

Material. Holotype, ♂ ( ZIN): Uganda, southwestern part, Kanungu Distr., environs of Bwindi National Park ,~ 1500 m, secondary forest, at light, 19– 22.02.2020 (A. V. Gorochov).

Description. Male (holotype). Body colouration very similar to that in D. irisovi sp. n. but with the following differences: head and pronotum more similar in colouration to those of male paratype of this species, but mouthparts (including maxillary palpi) completely yellowish, and hind part of pronotal disc also lighter (yellowish with greyish tinge); colouration of wings distinguished from that of D. irisovi sp. n. males only by larger yellowish spot on dorsal field of left tegmen (this spot including proximal half of mirror, but in D. irisovi sp. n., this mirror almost completely brown); legs distinguished from those of this species only by darker (completely brown) fore femur; rest of body approximately as in male paratype of D. irisovi sp. n. in colouration, but abdominal sternites and proximal two thirds of genital plate light brown. Structure of body also similar to that of this species, but some characteristic features presented: upper rostral tubercle slightly lower than in this species; its truncated anterior part (having thin anteromedian groove) about 0.6 mm in height, with small but distinct ventral tubercle directed forwards, and with narrower concave area between upper and lower rostral tubercles (width of this area between antennal cavities almost 0.3 mm); tegmina slightly narrower in middle part (compare Figs 1 and 9 ) and with tegminal stridulatory apparatus almost indistinguishable from that of nominotypical subspecies and of D. irisovi sp. n., but this apparatus in right tegmen with minimal transverse width of heavily sclerotized part between plectrum and mirror membrane almost 1.1 times as great as transverse width of nearest part of this membrane (vs this ratio ~ 0.9 in D. c. corrosifolium and ~ 1 in D. irisovi sp. n.), and in left tegmen with stridulatory vein slightly narrower and having shorter as well as more numerous and denser stridulatory teeth (1 mm of middle part of this vein with 35 teeth, and medial part of this vein less curved and with 3 or 4 barely sparser teeth; Fig. 11 ); abdominal apex also almost indistinguishable from that of D. irisovi sp. n., but cercus before apical part as in nominotypical subspecies (i.e. distinctly longer and thinner than in D. irisovi sp. n.) as well as with apical part more thin and acute than in D. c. corrosifolium ( Figs 10, 14 ), and genital plate with very short and rounded apical notch ( Fig. 10 ).

Female unknown.

Length (in mm). Body 19; body with wings 48; pronotum 4.3; tegmina 38; hind femora 28.5.

Comparison. ffle new subspecies is known from a significantly more eastern part of Africa and differs from the nominotypical subspecies ( Cameroon) in the absence of any transparent or semitransparent spots in the male tegminal lateral fields, a partly yellowish mirror in the left tegmen (vs this mirror completely dark), the abovementioned (in the subspecies description) details of the stridulatory apparatus in the right tegmen, and the male cercus with a thinner and sharper apex; also it is useful to note that the male syntype of D. c. corrosifolium , judging by photographs from Cigliano et al. [2022], possibly has its epiproct with a narrowly rounded (not widely truncated) apex, and if it is not an epiproctal deformity, this new taxon may be a separate species but not a subspecies of D. corrosifolium . From all other congeners, the new subspecies is distinguished by the characters listed in its description (from D. irisovi sp. n.) or by the same characters as D. irisovi sp. n. (see the comparison after the description of this species).

Etymology. ffle new subspecies is named after the country Uganda where it was collected.

Figures

Figs 1–14. Species of the genus Drepanophyllum, general view and details of structure. 1–8 – D. irisovi sp. n.; 9–11 – D. corrosifolium ugandense subsp. n.; 12–13 – D. marmoratum; 14 – D. c. corrosifolium, syntype. 1 – male, dorsal view; 2, 12 – female, lateral view; 3–4 – stridulatory apparatus: 3 – of left male tegmen, 4 – of right male tegmen; 5, 10 – male abdominal apex from above and slightly behind; 6, 11 – stridulatory vein of male left tegmen ventrally; 7 – female abdominal apex from side; 8 – female genital plate from below; 9 – male left tegmen; 13–14 – male right cercus from more or less above. 12 – after Brunner-Wattenwyl [1891]; 13–14 – after Cigliano et al. [2022]. Рис. 1–14. ВиΑы роΑа Drepanophyllum, общий виΑ и ΑетаΛи строения. 1–8 – D. irisovi sp. n.; 9–11 – D. corrosifolium ugandense subsp. n.; 12–13 – D.marmoratum; 14 – D. c. corrosifolium, синтип. 1 – самец, виΑ сверху; 2, 12 – самка, виΑ сбоку; 3–4 – стриΑуΛяционный аппарат: 3 – Λевого наΑкрыΛья самца, 4 – правого наΑкрыΛья самца; 5, 10 – вершина брюшка самца сверху и сΛегка сзаΑи; 6, 11 – стриΑуΛяционная жиΛка Λевого наΑкрыΛья самца вентраΛьно; 7 – вершина брюшка самки сбоку; 8 – генитаΛьная пΛастинка самки снизу; 9 – Λевое наΑкрыΛье самца; 13–14 – правый церк самца боΛее иΛи менее сверху. 12 – по [Brunner-Wattenwyl, 1891]; 13–14 – по [Cigliano et al., 2022].