Diestostemma bituberculatum, Signoret, 1855

Pinto, Ângelo Parise, Mejdalani, Gabriel & Takiya, Daniela Maeda, 2017, Unraveling the white-clothed Diestostemma Amyot & Serville: a taxonomic revision of the American sharpshooters of the D. bituberculatum complex (Hemiptera: Cicadellidae), Zootaxa 4281 (1), pp. 135-164 : 138-139

publication ID

https://doi.org/10.11646/zootaxa.4281.1.14

publication LSID

lsid:zoobank.org:pub:DE0BD9D9-B661-43DF-90BA-4F31C4B3ADC9

DOI

https://doi.org/10.5281/zenodo.6032970

persistent identifier

https://treatment.plazi.org/id/03D787EF-080A-FFE2-86DA-FC37FA73FC78

treatment provided by

Plazi

scientific name

Diestostemma bituberculatum
status

 

Key to species of the D. bituberculatum complex

Keys to species of Proconiini available in Young (1968) are almost exclusively based on the male terminalia. However, during our studies on this genus we observed consistent external morphology and female characters for suitable specific identification that are adopted here. The key should be used in association with illustrations and checked with the diagnoses, in addition to careful examination of the terminalia, to confirm identifications. Males of D. rubriventris are unknown.

1. Dorsolateral portion of pronotum usually not or only slightly projected dorsally (except D. reticulatum , D. atropuctulatum , and D. nervosum group, as Figs. 11–12 View FIGURES 1 – 12 ); forewing white to brownish; distinct sclerotized dark vein areas (SDV) strongly variable from few longitudinal basal lines, four to five small rounded spots, large reticulate markings to virtually all veins and cells........................................................................ Other species groups of Diestostemma

1’. Dorsolateral portion of pronotum strongly projected dorsally into two hump-shaped tubercles ( Figs. 1–10 View FIGURES 1 – 12 ); forewing white with only two to three dark brown to black SDV areas at proximal 0.33, distal one large H- or T-shaped or rounded marking ( Figs. 46–55 View FIGURES 46 – 55 ).................................................................. 2 D. bituberculatum complex

2 (1’). Forewing with distal SDV as a large rounded spot ( Figs. 54–55 View FIGURES 46 – 55 ); posterior margin of female sternite VII bilobed, mesally not distinctly projected, almost truncate ( Fig. 92 View FIGURES 87 – 92 ). Peru (Madre de Dios) and Brazil (Mato Grosso) ( Fig. 93 View FIGURE 93 )..... D. rubriventris

2’. Forewing with distal SDV usually as a H- or T-shaped marking, sometimes incomplete resulting in two spots ( Figs. 46–53 View FIGURES 46 – 55 ); posterior margin of female sternite VII bi- or trilobed, usually with a distinct mesal lobe slightly to strongly projected ( Figs. 87–91 View FIGURES 87 – 92 ).............................................................................................. 3

3 (2’). Males............................................................................................... 4

3’. Females............................................................................................. 8

4 (3). Basiventral process of aedeagus abruptly curved anteriorly at distal 0.3–0.4 forming approximate right angle (= 90º) in lateral view ( Fig. 75 View FIGURES 72 – 80 ). Guyana, French Guiana, and Brazil (Amazonas) ( Fig. 93 View FIGURE 93 )........................... D. bituberculatum

4’. Basiventral process of aedeagus gently curved anteriorly or dorsally forming obtuse angle (>100o) in lateral view ( Figs. 72, 78 View FIGURES 72 – 80 , 81, 84 View FIGURES 81 – 86 ).............................................................................................. 5

5 (4’). Basiventral process of aedeagus with rami robust, slightly curved anteriorly ( Fig. 72 View FIGURES 72 – 80 ), laterally expanded into pair of laterally flattened rami in lateral view ( Figs. 72–74 View FIGURES 72 – 80 ); venter of abdomen noticeably realgar colored ( Fig. 37 View FIGURES 37 – 45 ). Ecuador ( Fig. 93 View FIGURE 93 )............................................................................................ D. albinoi sp. nov.

5’. Basiventral process of aedeagus with rami slender, noticeably curved anteriorly ( Figs. 78 View FIGURES 72 – 80 , 81, 84 View FIGURES 81 – 86 ) and laterally slightly expanded into biconical or narrower flattened rami in lateral view ( Figs. 78–86 View FIGURES 72 – 80 View FIGURES 81 – 86 ); venter of abdomen yellowish-white to brownish-yellow ( Figs. 41, 43 View FIGURES 37 – 45 )................................................................................ 6

6 (5’). Basiventral process of aedeagus with proximal portion projected into an acute process ( Figs. 78–80 View FIGURES 72 – 80 ), rami laterally expanded distally (biconical) in posterior view ( Figs. 79–80 View FIGURES 72 – 80 ). Brazil (Rondônia and Mato Grosso) ( Fig. 93 View FIGURE 93 )..... D. cavichiolii sp. nov.

6’. Basiventral process of aedeagus without proximal acute process ( Figs. 81–86 View FIGURES 81 – 86 ), rami slender and flattened in posterior view ( Figs. 82–83, 85–86 View FIGURES 81 – 86 )................................................................................... 7

7 (6’). Basiventral process of aedeagus bifurcated near base of shaft ( Figs. 81–82 View FIGURES 81 – 86 ), rami with lateral concavities distributed along distal 0.5 ( Fig. 81 View FIGURES 81 – 86 ). Ecuador ( Fig. 93 View FIGURE 93 )........................................................ D. gervasioi sp. nov.

7’. Basiventral process of aedeagus bifurcated at about midlength of shaft ( Figs. 84–85 View FIGURES 81 – 86 ), each ramus with large dorsal concavity at distal 0.25 ( Fig. 84 View FIGURES 81 – 86 ). Ecuador ( Fig. 93 View FIGURE 93 )........................................................ D. olivia sp. nov.

8 (3’). Venter of abdomen distinctly realgar colored ( Figs. 38, 40 View FIGURES 37 – 45 ); posterior margin of sternite VII with mesal lobe extending distally beyond lateral lobes ( Figs. 87–88 View FIGURES 87 – 92 )........................................................................ 9

8’. Venter of abdomen yellowish-white to brownish-yellow ( Figs. 42, 44 View FIGURES 37 – 45 ); posterior margin of sternite VII with mesal lobe not extending distally as far as lateral lobes ( Figs. 89–91 View FIGURES 87 – 92 )........................................................ 10

9 (8). Sternite VII with mesal lobe wider, maximum width at base ±0.33 of sternite width, lateral lobes extending distally to about 0.5 mesal lobe length ( Fig. 87 View FIGURES 87 – 92 ); pronotal disc golden yellowish-brown with dark markings over mesal callosities and dorsolateral carina ( Figs. 2 View FIGURES 1 – 12 , 25–26 View FIGURES 25 – 30 ). Ecuador ( Fig. 93 View FIGURE 93 ).................................................... D. albinoi sp. nov.

9’. Sternite VII with mesal lobe slender, maximum width at base Ĺ0.25 of sternite width, lateral lobes extending distally to about 0.33 mesal lobe length ( Fig. 88 View FIGURES 87 – 92 ); pronotal disc pale yellow, lacking dark areas ( Figs. 4 View FIGURES 1 – 12 , 27–28 View FIGURES 25 – 30 ). Guyana, French Guiana, and Brazil (Amazonas) ( Fig. 93 View FIGURE 93 )............................................................... D. bituberculatum

10 (8’). Sternite VII with posterior margin strongly trilobed, mesal lobe strongly projected in ventral view ( Fig. 91 View FIGURES 87 – 92 ). Ecuador ( Fig. 93 View FIGURE 93 )...................................................................................... D. olivia sp. nov.

10’. Sternite VII with posterior margin almost bilobed, with mesal lobe slightly projected in ventral view ( Figs. 89–90 View FIGURES 87 – 92 )....... 11

11 (10’). Forewing with two SDV areas ( Figs. 29–30 View FIGURES 25 – 30 ); lateral lobes of sternite VII distinctly carinated, tips slightly divergent ( Fig. 89 View FIGURES 87 – 92 ). Brazil (Rondônia and Mato Grosso) ( Fig. 93 View FIGURE 93 ).............................................. D. cavichiolii sp. nov.

11’. Forewing with three SDV areas ( Figs. 31–32 View FIGURES 31 – 36 , 53 View FIGURES 46 – 55 ); lateral lobes of sternite VII not carinated, tips parallel ( Fig. 90 View FIGURES 87 – 92 ). Ecuador ( Fig. 93 View FIGURE 93 )............................................................................. D. gervasioi sp. nov.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hemiptera

Family

Cicadellidae

Genus

Diestostemma