Hirrius mindanaensis Günther, 1938

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 : 14-19

Hirrius mindanaensis Günther, 1938

Vernacular name: Western Mindanao Blackhopper ( Figs 7 , 8 , 9 , 10 , 11 )

Historical mentions: As Hirrius mindanaensis Günther 1938: 304 ; Petersen & Gaedike 1970: 166; Blackith 1992: 90; Skejo 2017: 121.

Type specimens. 2♀♀ syntypes and 1♂ syntype with same labels: ‘ Mindanao W. Schultze’ ‘Iligan’ ‘Lanao’ ‘Syntypus’ ‘ Hirrius mindanaensis n. sp. K. Günther det.’ ( SDEI) ( Günther 1938) .

Published records: 2♀♀ the Philippines: Mindanao Isl. : Lanao del Norte: Mumungan , Collector: W. Schultze, det. K. K. Günther ( SMTD) ( Günther 1938) ; 1 ♀ Philippines: Mindanao : Zamboanga del Norte: Sandayong , VIII.2020. det. 2022 J. Tumbrinck ( CJT) ( Cigliano et al. 2023) .

Additional records.

Museum records:

1 ♀ + 1♂ Philippines: Mindanao : Zamboanga del Norte: Sandayong , VIII.2020. det. 2022 J. Tumbrinck ( ZMH) ; 1 ♀ + 1♂ Philippines: Mt. Agad-Agad ( Barangay Tipanoy , Sitio Pendugangan , Iligan, Lanao del Norte) 305 m a. s. l. 28.-30.XI.2020. leg. R. Patano Jr. ( CMU) .

Online social media records:

1♂ Philippines: Zamboanga del Sur: Lapaz Experimental Forestry 920 m a. s. l. observed on 31.I.2020. by iNaturalist user @anncabras24, available at https://www.inaturalist.org/observations/38141140 .

Diagnosis. Hirrius mindanaensis shares characters with its congeners, but there is a set of characters by which it can be easily distinguished from H. punctatus and H. ruber sp. nov.: (1) alae are visible under the pronotum in lateral view (also visible in H. ruber sp. nov., but not in H. punctatus ); (2) prozonal carinae are distinct, while they are literally absent in H. punctatus and H. ruber sp. nov.; (3) hind femora visibly robust (much slenderer in H. punctatus and H. ruber sp. nov.); (4) abdominal sternites dark, similar to H. punctatus , while H. ruber sp. nov. has bright red sternites; (5) slightly larger than H. ruber sp. nov. (see measurements); (6) pronotum of variable coloration, but generally with much paler ornamentation than in H. punctatus and H. ruber sp. nov., which both have bright red and yellow markings.

Syntype measurements (female). Body length from tip of head to the tip of pronotum 10.85 mm; eye width 0.70 mm, vertex width 0.95 mm; pronotum length 10.05 mm; pronotum width (at shoulders) 3.40 mm; fore femur length 2.80 mm; fore femur width 0.70 mm; mid femur length 2.85; mid femur width 0.70; hind femur length 6.10 mm; hind femur width 2.45 mm.

Syntype measurements (male). Body length from tip of head to the tip of pronotum 8.90 mm; eye width 0.65 mm; vertex width 0.80 mm; pronotum length 7.80 mm; pronotum width (at shoulders) 2.80 mm; fore femur length 2.25 mm; fore femur width 0.50 mm; mid femur length 2.35 mm; mid femur width 0.60 mm; hind femur length 4.80 mm; hind femur width 2.10 mm.

Distribution and habitat. Western Mindanao Blackhopper inhabits lowland and mountainous tropical rainforests of Mindanao, where it can be found from 100 m a. s. l. up to 950 m a. s. l. in the regions around the lake of Lanao (e.g., Lanao del Norte) and on the Zamboanga Peninsula (in e.g., Zamboanga del Norte and Zamboanga del Sur) ( Fig. 2B ).

Figures

FIGURE 2. Distribution of the species belonging to the genera Hirrius and Parahirrius gen. nov., both endemic to the island of Mindanao. A) H. punctatus, B) H. mindanaensis, C) H. ruber sp. nov., D) P. parvus sp. nov., E) P. amorosus sp. nov.

FIGURE 7. Hirrius mindanaensis Günther, 1938 syntypes from SDEI (A–D ♀ and E–I ♂). A) ♀ left lateral view, B) ♀ dorsal view, C) ♀ head in frontal view, D) ♀ syntype labels, E) ♂ left lateral view, F) ♂ right lateral view, G) ♂ dorsal view, H) ♂ head in frontal view, I) ♂ syntype labels. Photo S. Ingrisch.

FIGURE 8. Hirrius mindanaensis Günther, 1938 ♀ from Zamboanga peninsula. A) head in frontal view, B) dorsal view, C) right lateral view, D) labels, E) left dorsolateral view. Photo J. Tumbrinck.

FIGURE 9. Hirrius mindanaensis Günther, 1938 ♀ from Zamboanga peninsula. A) dorsal view, B) left lateral view, C) labels, D head in frontal view. Photo E. Nguyen.

FIGURE 10. Hirrius mindanaensis Günther, 1938 ♂ from Zamboanga peninsula. A) dorsal view, B) left lateral view, C) head in frontal view, D) labels. Photo E. Nguyen.

FIGURE 11. Hirrius mindanaensis Günther, 1938 A–B) living specimen from Iligan, photo R. Patano Jr., C) living ♂ from Zamboanga del Sur observed by iNaturalist user @anncabras24 on on 31.I.2020., iNaturalist observation 38141140.