Pteroptyx

Ballantyne, Lesley, Fu, Xin Hua, Shih, Chun-Hat, Cheng, Chui-Yu & Yiu, Vor, 2011, Pteroptyx maipo Ballantyne, a new species of bent-winged firefly (Coleoptera: Lampyridae) from Hong Kong, and its relevance to firefly biology and conservation, Zootaxa 2931, pp. 8-34: 11-12

publication ID

http://doi.org/ 10.5281/zenodo.278036

DOI

http://doi.org/10.5281/zenodo.5672758

persistent identifier

http://treatment.plazi.org/id/292587ED-0578-2100-FF16-F8DA36887607

treatment provided by

Plazi

scientific name

Pteroptyx
status

 

Key to species of Pteroptyx   from SE Asia using males

( Figs 7–32 View FIGURES 7 – 17 View FIGURES 18 – 26 View FIGURES 27 – 32 )

1. Light organ in V 7 entire; flanges present on ventral surface of tergite 8; MFC absent; aedeagal sheath lacking paraprocts; lateral lobes of aedeagus separated for most of their dorsal length; having orange pronotum and dark brown elytra............................................................................................................ amilae Satô  

- Light organ in V 7 bipartite; flanges usually absent on the ventral surface of tergite 8; MFC present (e.g. Fig. 22 View FIGURES 18 – 26 ); aedeagal sheath with paraprocts ( Figs 15, 16 View FIGURES 7 – 17 ); lateral lobes of aedeagus separated along their dorsal length for less than half their length ( Fig. 14 View FIGURES 7 – 17 ); colour often pale brownish yellow with black elytral apices...................................................... 2

2. V 7 with slender incurving hair bearing lobes along its posterior margin between PLP and MPP (arrowed in Figs 9, 10 View FIGURES 7 – 17 ); LOs in V 7 restricted to very small anterolateral plaques; PLP of V 7 narrowed and considerably produced beyond the posterior margin of the MPP; T 8 prolonged apically beyond MPP with margins converging posteriorly ( Figs 9, 10 View FIGURES 7 – 17 )......... macdermotti McLean  

- V 7 lacking slender incurving hair bearing lobes along its posterior margin between PLP and MPP of that ventrite; LOs in V 7 never restricted to very small anterolateral plaques; if posterolateral processes of V 7 narrowed then not produced far beyond the posterior margin of MPP if at all; T 8 not as above.............................................................. 3

3. Tergite 8 bearing slender elongate lobes along its posterior margin to either side of the posterior median emargination ( Figs 7, 13 View FIGURES 7 – 17 ); flanges on ventral surface of tergite 8 absent; basitarsi of legs 2 excavated in its inner margin ( Fig. 11 View FIGURES 7 – 17 )............... 4

- Tergite 8 lacking slender elongate lobes along its posterior margin to either side of the median posterior emargination (e.g. Figs 8, 17 View FIGURES 7 – 17 , 19, 24 View FIGURES 18 – 26 ); flanges may be present on ventral surface of tergite 8 ............................................... 7

4. Posterior margin of tergite 8 strongly asymmetrical especially when viewed from above; posterior margin of tergite 7 broadly and shallowly emarginate; elytral apices broadly rounded (C> A or B); all FS simple; posterolateral corners of V 7 produced and rounded............................................................................. asymmetria Ballantyne  

- Posterior margin of tergite 8 symmetrical or nearly so ( Figs 7 View FIGURES 7 – 17 , 19, 24 View FIGURES 18 – 26 ); if any asymmetry present this is in the paired lobes arising at each side of the median posterior emargination, and not an asymmetry of the entire posterior margin; elytral apices rounded or margin B obliquely truncate; flagellar segment 1 slightly expanded in median area in decolor   ; posterolateral corners of V 7 produced and rounded, or not produced and angulate; posterior margin of tergite 8 deeply emarginated in middle area with posterolateral corners produced and rounded, or barely and very narrowly emarginated in median line only..................... 5

5. Posterolateral processes of V 7 angulate, not or scarcely produced posteriorly ( Figs 7, 12 View FIGURES 7 – 17 ); posterior margin of V 7 between PLP and MPP slightly sinuate; posterior margin of T 7 with narrowed angulate corners and a small shallow median emargination (margin appears trisinuate); elytral apices obliquely truncate across most of their anterior (outer) margin (C)...... tener Olivier  

- Posterolateral processes of V 7 rounded obtuse, and produced posteriorly; posterior margin of V 7 between PLP and MPP with moderately deep and rounded emarginations; posterior margin of tergite 7 deeply emarginated in middle area with posterolateral corners produced and rounded; posterior margin of T 7 not appearing trisinuate; elytral apices C rounded or truncate......... 6

6. Dorsal surface entirely pale coloured except for dark markings at tip of elytra, head and anterior margin of scape pale yellow with labrum dark brown; elytral apices rounded.................................................... decolor Olivier  

- Elytra pale brown, semitransparent, with lateral margin paler than rest; if elytra pale then at least base and apex brown; head pale brown, with labrum slightly darker; elytral apex B obliquely truncate................................ similis Ballantyne  

7. Deflexed elytral apex shortened (wider than long) ( Fig. 23 View FIGURES 18 – 26 ); tibiae 3 not expanded; basitarsi 3 not swollen; fine ventrally directed flanges on ventral surface of tergite 8 absent; PLP separated from MPP by moderately deep circular emarginations ( Fig. 18 View FIGURES 18 – 26 ); apices of PLP broad, flat, slightly obliquely truncate; posterior margin of T 7 not emarginated and posterolateral corners not produced; lateral margins of tergite 8 rounded.................................................... truncata Ballantyne  

- Deflexed elytral apex not shortened (i.e. about as wide as long); tibiae 3 often expanded at apex and basitarsi 3 may be swollen ( Fig. 26 View FIGURES 18 – 26 ); fine ventrally directed flanges may be present on the ventral surface of tergite 8 ( Fig. 17 View FIGURES 7 – 17 ); PLP separated from MPP by moderately deep circular emarginations or not; apices of PLP sometimes flat, slightly obliquely truncate; posterior margin of T 7 usually emarginated and posterolateral corners produced; lateral margins of tergite 8 rounded or straight and converging anteriorly.................................................................................................. 8

8. Posterior end of elytra dimpled ( Figs 20, 21 View FIGURES 18 – 26 ); wide deep emarginations separating elongate narrow PLP from MPP; apices of PLP narrow and rounded; posterolateral corners of T 8 angulate and lateral margins converge anteriorly; posterolateral corners of T 7 narrowed and may project and are often visible from beneath in the emarginations between PLP and MPP ( Fig. 19 View FIGURES 18 – 26 )............................................................................................ gelasina Ballantyne  

- Posterior end of elytra not dimpled; either wide emarginations separating elongate PLP from MPP, or emarginations scarce; apices of PLP often slightly oblique, or PLP broadly rounded and scarcely produced; posterolateral corners of T 8 angulate and lateral margins converge anteriorly or corners and lateral margins rounded; posterolateral corners of T 7 not usually visible from beneath in the emarginations between PLP and MPP........................................................... 9

9. Posterolateral corners of V 7 rounded or angulate, scarcely produced; MPP of V 7 broad and apex almost squarely truncate or slightly rounded in ventral view and perpendicular to horizontal plane; median dorsal surface of MPP may be narrowly prolonged and apically emarginated.......................................................................... 10

- PLP of V 7 elongate, longer than wide, produced and apically obliquely truncated; MPP of V 7 narrower and apex emarginated (emargination visible from beneath); median dorsal surface of MPP not developed ( Figs 24, 25 View FIGURES 18 – 26 )........................................................................................... masatakai Kawashima   , malaccae (Gorham)   1

10 Dorsal surface of MPP of V 7 strongly prolonged and apically narrowly emarginated......................................................................... sulawesiensis Kawashima   ; valida Olivier sensu Ballantyne (2001 Group 2: 81)   2

- Dorsal surface of MPP either lacking a median posterior projection or with a slight projection......................... 11

11. Elytral apices strongly deflexed ( Fig. 32 View FIGURES 27 – 32 ); posterior margin of outer area of elytral apex grooved; LO in V 7 well separated in the middle ( Figs 27, 31 View FIGURES 27 – 32 )............................................ valida Olivier sensu Ballantyne (2001) Groups   1, 3 3

- Elytral apices not strongly deflexed ( Fig. 2 View FIGURES 1 – 6 ); posterior margin of outer area of elytral apex not grooved; LO in V 7 contiguous in the middle ( Fig. 2 View FIGURES 1 – 6 )........................................................................... maipo   sp. nov.

MFC

Matsushima Fungus Collection