Glyptobasis, McLachlan, 1873

Suryanarayanan, Thangalazhi Balakrishnan, Ábrahám, Levente & Bijoy, Chenthamarakshan, 2024, Taxonomic revision of the owlfly genus Glyptobasis McLachlan, 1873 (Neuroptera: Ascalaphidae) from India and its adjacent countries, Zootaxa 5486 (3), pp. 388-418 : 414

Key to species of the genus Glyptobasis

G. fraseri is excluded from the key since the type specimen is too damaged to determine characters.

1. Only one yellow band on mesothorax in lateral view ( Figs. 1C and 17D )......................................... 2

- Two distinct yellow bands on meso and metathorax in lateral view ( Figs. 4C ; 10C ; 19C )............................. 3

2. Labrum pale yellow with dark brown apical margin ( Fig. 2B ), male antenna slightly curved with small teeth on inner surface ( Fig. 2A )............................................................................ G. cornuta Kimmins

- Labrum shiny dark brown to black ( Fig. 17B ), male antenna strongly curved in S-shape with well-developed teeth on inner surface ( Fig. 17A ).............................................................. G. spinicornis van der Weele

3. Labrum and clypeus pale brown ( Figs. 15B ; 19B )............................................................ 4

- Labrum and clypeus dominantly dark brown to black......................................................... 5

4. Pterostigma and legs reddish brown ( Figs. 15A;C ), male ectoproct with short and stout caudo-ventral processus, gx9+11 extensions at right angles curved with blunt-ended projection directed inwards at base in ventral view (as in Kimmins 1949:23, fig. 9)............................................................................... G. nugax (Walker)

- Pterostigma and legs dark brown to black ( Figs. 19A;C ), male ectoproct with small and thin caudo-ventral processus, gx9+11 extensions evenly curved without protuberance in ventral view (as in Kimmins 1949:23, fig. 9)......... G. weelei Kimmins

5. Frons shiny black without any marks ( Figs. 10B ; 12A )...................................... G. nigrifrons Kimmins

- Frons dominantly brown with lateral indistinct, yellowish spot below scapus ( Figs. 4B ; 7A )....... G. dentifera (Westwood)

Figures

FIGURES 1A–C. Holotype male of Glyptobasis cornuta Kimmins, 1949 preserved in the NHMUK, A—Habitus, B—Head in frontal view; C—Thorax and legs in lateral view.

FIGURES 2A–C. Glyptobasis cornuta Kimmins, 1949 A—Habitus, B—Head in frontal view; C—Thorax and legs in lateral view.

FIGURES 4A–C. Lectotype female of Glyptobasis dentifera (Westwood, 1847) preserved in the OUMNH, A—Habitus, B— Head in frontal view; C—Thorax and legs in lateral view, Photo: Oxford University Museum of Natural History©.

FIGURES 7A–E. Glyptobasis dentifera (Westwood, 1847).A—Head in frontal view; B—Head and thorax in ventral view, C— Male wing venation, D—Foreleg; E—Hindleg in lateral view. Abbreviations. C—Costa, Sc—Subcosta, R—Radius, Sc+R— Subcosta + Radius, oRs—origin of radial sector, rs—radial sector, tp—triangular process, ps—pterostigma, msb—mesothoracic band, mtb—metathoracic band, t1–t5—tarsomeres 1–5, ts—tibial spurs, tc—tarsal claws.

FIGURES 10A–C. Holotype male of Glyptobasis nigrifrons Kimmins, 1949, NHMUK, A—Habitus, B—Head in frontal view; C—Thorax and legs in lateral view.

FIGURES 12A–E. Glyptobasis nigrifrons Kimmins, 1949. A—Head in frontal view; B—Thorax and legs in lateral view, C—Wing venation, D—Foreleg; E—Hindleg in lateral view.

FIGURES 15A–C. Type specimen of Glyptobasis nugax (Walker, 1853) preserved in the NHMUK, A—Habitus, B—Head in frontal view; C—Head and thorax in lateral view.

FIGURES 17A–D. Lectotype male and paralectotype female of Glyptobasis spinicornis van der Weele, 1909b preserved in the MCSN, A—Habitus, B—Head in frontal view, C—Thorax and legs in lateral view, D—Paralectotype female head, thorax and legs in ventral view.

FIGURES 19A–C. Paratype female of Glyptobasis weelei Kimmins, 1949 preserved in the NHMUK, A—Habitus, B—Head in frontal view; C—Head and thorax in lateral view.