Guentheracris scrobiculata ( Günther, 1937 ) Skejo & Husemann & Jr & Tumbrinck & Pushkar & Pavlović & Mohagan & Pamin & Kasalo, 2024

Skejo, Josip, Husemann, Martin, Jr, Romeo Patano, Tumbrinck, Josef, Pushkar, Taras I., Pavlović, Marko, Mohagan, Alma, Pamin, Jan-Henrik & Kasalo, Niko, 2024, Revision of the polyphyletic genus Hirrius Bolívar, 1887 (Orthoptera: Tetrigidae), with descriptions of three new genera and insights into antennal sensilla morphology, Zootaxa 5524 (1), pp. 1-61 : 24-26

Guentheracris scrobiculata ( Günther, 1937) , comb. nov.

Vernacular name: Ile-Ile Pygmy Devil ( Figs. 14 , 15 )

Historical mentions: As Hirrius scrobiculatus Günther 1937: 177 ; 1938: 303; Blackith 1992; As Zvierckia scrobiculata Skejo 2017: 193 ; unavailable according to Article 13.1 of the Code ( ICZN, 1999).

Type specimens. 1♀ holotype ‘ Celebes Ile Ile 500 m 11.12.1930 G Heinrich leg.’ ‘ Hirrius scrobiculatus K. Günther’ ‘ Typus’ ( MfN) ; 1♂ paratype ‘ Celebes Ile Ile 500 m 11.12.1930 G Heinrich leg.’ ‘ Hirrius scrobiculatus K. Günther’ ‘ Typus’ ( SMTD) .

IUCN Red List assessment: Vulnerable B1ab (iii,v) ( Hochkirch & Skejo 2019).

Diagnosis. Antennae long, 15-segmented, 10 th segment strongly widened, pennate. 9 th and 7 th antennomeres with wide pale colored rings. Vertex wide, in females two times wider than an eye, in males 1.65 times wider than an eye. In frontal view, vertex flat; frontal costa bifurcating between the eyes; antennal grooves inserted between the eyes: dorsal margins of the antennal grooves between the lower third of the compound eyes height. In lateral view, the disc of the pronotum wavy, with two deep depressions: one just behind the shoulders, and the other just before the apex of the pronotum. Prozonal carinae indistinct. Tegmina almost completely covered by infrascapular area. Hindwings visible. Femora slender, genicular and antegenicular teeth of the hind femur sharp. General color black.

Holotype measurements (female). Body length from tip of head to the tip of pronotum 14.75 mm; eye width 0.60 mm, vertex width 1.20 mm; pronotum length 13.60 mm; pronotum width (at shoulders) 3.85 mm; tegmen length 1.0 mm; tegmen width 0.15 mm; fore femur length 4.10 mm; fore femur width 0.85 mm; mid femur length 4.15 mm; mid femur width 0.80 mm; hind femur length 8.00 mm; hind femur width 2.80 mm.

Paratype measurements (male). Body length from tip of head to the tip of pronotum 11.75 mm; eye width 0.60 mm, vertex width 1.00 mm; pronotum length 11.05 mm; pronotum width (at shoulders) 3.45 mm; tegmen length 0.70 mm; tegmen width 0.10 mm; fore femur length 3.15 mm; fore femur width 0.60 mm; mid femur length 3.15 mm; mid femur width 0.75 mm; hind femur length 6.45 mm; hind femur width 2.00 mm.

Distribution and habitat. Indonesia, northern Sulawesi, endemic to the mountainous tropical rainforests of Gunung Ile-Ile Mt. (500 m a.s.l) that is part of the Matinan Mountains.

Notes. This interesting genus and its only species are known only from holotype female and paratype male collected by Gerd Hermann Heinrich during the expedition to Ile-Ile Mts. in northern Sulawesi in 1930. There have been no new records during the last 93 years. It is likely that more new species will be found in the future, as well as that Ile-Ile Pygmy Devil lives in other localities in northern Sulawesi where the rainforest is still present. This species was described based on two speciments, male and female, recorded as holotype and allotype ( Günther, 1937), but without type lables on both speciments. Here we considered female as holotype and male as paratype.

Figures

FIGURE 14. Guentheracris scrobiculata (Günther, 1937) comb. nov. ♀ holotype from Sulawesi, Ile-Ile.A) dorsal view, B) left lateral view, C) head in frontal view, D) labels. Photo E. Nguyen.

FIGURE 15. Guentheracris scrobiculata (Günther, 1937) comb. nov. ♂ paratype from from Sulawesi, Ile-Ile,. A) left lateral view, B) dorsal view, C) head in frontal view, D) labels. Photo S. Ingrisch.