Hecaloidella, Osborn, 1934

Xu, Deliang, Webb, Michael D., Shang, Suqin & Zhang, Yalin, 2021, Review of the Pacific leafhopper genus Hecaloidella (Hemiptera: Cicadellidae Deltocephalinae: Selenocephalini) with description of sixteen new species, Zootaxa 4948 (3), pp. 381-403 : 385-386

publication ID	https://doi.org/ 10.11646/zootaxa.4948.3.4
publication LSID	lsid:zoobank.org:pub:8E0BF97A-D9E1-4F2E-BB63-82A6ED47E5DC
DOI	https://doi.org/10.5281/zenodo.4667646
persistent identifier	https://treatment.plazi.org/id/597A878E-FFB8-FF95-FF66-F4DE8293F2DD
treatment provided by	Plazi
scientific name	Hecaloidella
status

Treatment

Key to species and species groups of Hecaloidella View in CoL (excluding H. brunifasciata)

1 Vertex with distinct longitudinal or oblique striations at least to anterior transverse sulcus; pronotum with distinct transverse striations; forewing with outer subapical cell tapered basally ( Figs. 2B View FIGURE 2 , 3D View FIGURE 3 ); aedeagus disassociated from connective ( H. nitida View in CoL species group)....................................................................................... 2

- Vertex and pronotum smooth or with indistinct striations; forewing with outer subapical cell tapered posteriorly ( Fig. 1I View FIGURE 1 ); aedeagus associated or disassociated from connective.......................................................... 6

2 Vertex without brown anterior spots................................................................. H. nitida View in CoL

- Vertex with pair of brown anterior spots................................................................... 3

3 Vertex spots large ( Fig. 1A View FIGURE 1 ); rest of vertex uniformly yellow ( Fig. 2A View FIGURE 2 )................................. H. bimaculata View in CoL

- Vertex spots small ( Fig. 1B View FIGURE 1 ) to moderately large ( Fig. 1E View FIGURE 1 ); rest of vertex orange anteriorly........................... 4

4 Vertex spots extending to fore margin; forewing dark with inner margin of clavus variably yellowish ( Figs. 1E–F View FIGURE 1 ); aedeagus with a basal ventral spine-like process ( Fig. 4L View FIGURE 4 )..................................................... H. pacifica View in CoL

- Vertex spots not extending to fore margin; forewing not as above; aedeagus with basal ventral process not spine-like...... 5

5 Connective caudal extension with a long basal ventral process ( Fig. 4C View FIGURE 4 )............................... H. caudospina View in CoL

- Connective caudal extension without a basal ventral process ( Fig. 4H View FIGURE 4 )................................. H. nudapenis View in CoL

6 Pronotum, mesoscutum and scutellum laterally with one small brown spot ( Figs. 1N–S View FIGURE 1 ); aedeagus disassociated from connective ( H. quadripicta View in CoL species group)...................................................................... 12

- Pronotum and mesonotum not marked as above; aedeagus associated with connective ( H. borneoensis View in CoL species group)..... 7

7 Vertex with a brownish spot each side of midline nearly coalescing basally ( Fig. 1M View FIGURE 1 ); connective stem not extended caudally, with a pair of apical spines ( Fig. 6Q View FIGURE 6 ); aedeagus with a long ventral process from preatrium ( Fig. 6S View FIGURE 6 )............ H. spinosa View in CoL

- Vertex uniformly brown or with a brick shaped brownish band each side of midline and a smaller brown mark next to each eye ( Figs 1H–L View FIGURE 1 ); connective stem extended caudally, aedeagus without a ventral process from preatrium................... 8

8 Aedeagus with either a single very small subapical process dorsally or two pair of apical processes.................... 9

- Aedeagus without processes............................................................................ 10

9 Aedeagus with a single small subapical process ( Fig. 6F View FIGURE 6 )............................................ H. brevispina View in CoL

- Aedeagus with two pair of apical processes ( Fig. 6M View FIGURE 6 )............................................. H. quadrispina View in CoL

10 Aedeagal shaft less than twice as long as height of atrium ( Fig. 6D View FIGURE 6 )................................... H. brevipenis View in CoL

- Aedeagal shaft more than twice as long as height of atrium ( Figs 6B, I View FIGURE 6 )......................................... 11

11 Aedeagus with gonopore arising near mid-length of shaft ( Fig. 6I View FIGURE 6 ).................................... H. longipenis View in CoL

- Aedeagus with gonopore arising two thirds distance to apex of shaft ( Fig. 6B View FIGURE 6 ).......................... H. borneoensis View in CoL

12 Connective with posterior extension ( Fig. 7N View FIGURE 7 )............................................................. 13

- Connective without posterior extension ( Fig. 7D View FIGURE 7 )...................................................... H. brevis View in CoL

13 Aedeagus with processes.............................................................................. 14

- Aedeagus without processes ( Fig. 7M, P View FIGURE 7 )........................................................... H. knighti View in CoL

14 Aedeagus with a single pair of apical processes............................................................ 15

- Aedeagus with two pairs of apical processes ( Fig. 8F View FIGURE 8 )........................................... H. sandakanensis View in CoL

15 Aedeagus with apical processes bifurcate ( Fig. 8J View FIGURE 8 ); dorsal processes near mid-length of shaft in lateral view ( Fig.8I View FIGURE 8 )............................................................................................... H. singaporensis View in CoL

- Aedeagus with apical processes not bifurcate, sometime with a small subapical spine ( Fig. 7H View FIGURE 7 ); dorsal process sub-basally on shaft in lateral view ( Fig. 7H View FIGURE 7 )........................................................................... 16

16 Style with poorly developed lateral lobe ( Fig. 7J View FIGURE 7 ); female pregenital sternite truncate with median conical projection ( Fig. 7L View FIGURE 7 )...................................................................................... H. brunnifacialis View in CoL

- Style with well-developed lateral lobe ( Fig. 8C View FIGURE 8 ); female pregenital sternite with posterior margin broadly rounded ( Fig. 8D View FIGURE 8 )......................................................................................... H. quadripicta View in CoL