Acanthoventris Ruschel, 2023

Ruschel, Tatiana Petersen, Bianchi, Filipe Michels, Campos, Luiz Alexandre & Carvalho, Gervasio Silva, 2023, Total evidence analysis elucidates the tangled systematic scenario within Fidicinini (Hemiptera: Auchenorrhyncha, Cicadidae), Arthropod Systematics & amp; Phylogeny 81, pp. 35-77 : 35

publication ID	https://dx.doi.org/10.3897/asp.81.e85755
publication LSID	lsid:zoobank.org:pub:67A7EC9A-9E05-4C74-901E-E2735085C924
persistent identifier	https://treatment.plazi.org/id/19E3B96D-8586-7557-25FB-9129A7469CD2
treatment provided by	Arthropod Systematics & Phylogeny by Pensoft
scientific name	Acanthoventris Ruschel
status	gen. nov.

Treatment

Acanthoventris Ruschel View in CoL gen. nov.

Type species.

Cicada drewseni Stål, 1854: 242, here designated.

Included species.

Etymology.

The name refers to the long, acute median projection of sternite II, like a thorn. Latin, m.: acanthus, thorn; ventris, belly. The genus is masculine.

Diagnosis.

The new genus differs from any other Fidicinini for the following combination of features: head (including eyes) broader than pronotum (except pronotal collar) and mesonotum; vertex short; supra-antennal plate not prominent relative to the anterior margin of head in dorsal view; pronotal collar wide, not exceeding the lateral margin of eyes; paranota posterior to eyes in lateral view; operculum obtuse with internal angles widely spaced (males); meracanthus reaching the posterior margin of operculum; forewings hyaline, veins not infuscated; vein RA divergent to Sc; anal lobe margin in hindwings slightly convex, slightly prominent relative to jugum margin; timbal cover flat (except in A. jauffreti comb. nov. and A. tumidus sp. nov.); median projection of sternite II acute, inserted between the metacoxae; sternite II with the edge well developed; sternite III longer than IV; sternite VII sub-triangular (except in A. igneus sp. nov., A. jauffreti comb. nov., A. tumidus sp. nov., and A. olivarius sp. nov.); uncus shorter than the basal lobe in lateral view; uncal dorsal crest fiused and dorsally projected; lateral branches of uncus undeveloped, bud-like; ventral apophyses sub-rectangular and ventrally developed; basal lobe of pygofer very long, reaching or nearly reaching the apex of uncal dorsal crest, clearly delimited with the lateral margin of the pygofer; protuberance of the basal plate of pygofer distant to the apex of the basal lobe; basal curve of the aedeagus short, near to the lateral lobes. Theca dorsally developed with a ventral thecal process.

Description.

Head: including eyes, broader than the pronotum (except pronotal collar) and mesonotum; vertex short, wide and slender, the lateral ocelli widely separated, supra-antennal plates not prominent relative to the anterior margin of the head in dorsal view, distant to the eyes; apex of postclyepus convex, without a groove; postclypeus oval in ventral view, flat or slightly salient in lateral view; anteclypeus flat, with a concave basal area. Thorax: pronotal collar wide, not exceeding the lateral margin of eyes; paranota in ventro-posterior position relative to the eyes in lateral view, not exceeding the ventral limit of the eye; cruciform elevation with the central and lateral areas flat, and the arc of the posterior projections obtuse; basisternum 3 flat and prominent relative to the mesocoxae, with protuberances well developed and the posterior margin angled; three segmented tarsi; profemora armed with three spines: the proximal round, leaning forward at the apex, the median sharp and straight, and the distal shorter than the others; posterior tibiae with at least four spines: two dorsal, one of which is at the middle of the tibia and one of which is three-fifths the distance from the base to the apex of the tibia, and two ventral, one of which is three-quarters of the distance from the base to the apex of the tibia and one of which is subapical. Wings hyaline, veins not infuscated; forewings: vein RA divergent to Sc from the basal cell; basal vein of the second apical cell oblique (except in A. claudiae sp. nov.); hindwings with radius vein straight, anal lobe margin slightly convex, slightly prominent relative to jugum margin. - Males: Operculum obtuse with internal angles widely spaced; meracanthus reaching the posterior margin of operculum; lateral metascutellar plates do not cover the timbal chamber; timbal cover flat (except in A. jauffreti comb. nov. and A. tumidus sp. nov.), the medial margin concave; lateral margin tightly concave (near the posterior margin of the operculum) except in A. charrua sp. nov., A. phoenix sp. nov. and A. densusus comb. nov. slightly concave (near the posterior margin of operculum); sternite I short, the space between sternites I and II smaller than metacoxae; sternite II flat, posterior margin arched; median projection of sternite II acute, inserted between the metacoxae; sternite II with the edge well developed, expanded to posterior margin of operculum; sternite III longer than the others; sternite VII sub-triangular; uncal dorsal crest fused and dorsally projected; lateral branches of uncus undeveloped, bud-like; ventral apophyses sub-rectangular and ventrally developed, originating from below the lateral branches of uncus; pygofer sub-cylindrical; basal lobe of pygofer very long, reaching or nearly reaching the apex of uncal dorsal crest; protuberance of the basal plate of pygofer distant to the apex of the basal lobe; basal curve of the aedeagus short, near to the lateral lobes. Theca dorsally developed with a ventral thecal process; lateral thecal process absent; vesica internally and externally bearing the cornuti. - Females: Operculum obtuse, meracanthus longer than the posterior margin; sternite VII wider than it is long, with a deep, triangular or obtuse groove; the dorsal beak of tergite 9 of the same length than the ovipositor sheath; ovipositor with six to nine teeth.

Distribution.

French Guiana, Brazil and Peru.

Key to the males of Acanthoventris Ruschel gen. nov.

1 Timbal cover tumid (Fig. 20 F View Figure 20 ) 2 - Timbal cover flat (Fig. 6 F View Figure 6 ) 3 2 Middle third of the anteromedial margin of the timbal cover convex (Fig. 20 F View Figure 20 ) A. tumidus sp. nov. - Middle third of the anteromedial margin of the timbal cover concave A. jauffreti comb. nov. 3 Labium reaching (Fig. 16 D View Figure 16 ) or surpassing the middle of sternite II (Fig. 12 D View Figure 12 ) 4 - Labium not reaching or surpassing the middle of sternite II (Figs 22 D View Figure 22 , 10 D View Figure 10 ) 5 4 Anterior margin of head slightly concave (Fig. 12 B View Figure 12 ); operculum not slightly reddish, short, the apex not reaching the auditory capsule (Fig. 12 E View Figure 12 ); sternite VII sub-triangular (Fig. 12 G View Figure 12 ) A. drewseni comb. nov. - Anterior margin of head tightly concave (Fig. 16 B View Figure 16 ); operculum slightly reddish, long, the apex reaching the auditory capsule (Fig. 16 E View Figure 16 ); sternite VII sub-rectangular (Fig. 16 G View Figure 16 ) A. igneus sp. nov. 5 Posterior margin of basisternum 3 straight (Fig. 8 D View Figure 8 ); body totally yellow; basal vein of the second apical cell straight (Fig. 8 A View Figure 8 ) A. claudiae sp. nov. - Posterior margin of basisternum 3 angled (Figs 22 D View Figure 22 , 13 D View Figure 13 ); body not totally yellow; basal vein of the second apical cell oblique (Figs 22 A View Figure 22 , 13 A View Figure 13 ) 6 6 Posterior margin of basisternum 3 forming an obtuse angle (Fig. 22 D View Figure 22 ) 7 - Posterior margin of basisternum 3 in an acute angle (Fig. 14 D View Figure 14 ) 10 7 Labium reaching or almost reaching the base of the basisternum (Fig. 18 D View Figure 18 ) 8 - Labium reaching the apex of the median projection of sternite II (Fig. 13 D View Figure 13 ) 9 8 Tergites 2 to 7 with pilus setae in both lateral margins (Fig. 18 A View Figure 18 ); apex of timbal cover directed to the metascutellar plate (Fig. 18 F View Figure 18 ); anterior margin of ventral sclerotized expansion of theca with a slender projection (Fig. 18 M View Figure 18 ) A. phoenix sp. nov. - Tergites 2 to 7 without pilus setae in both lateral margins (Fig. 22 A View Figure 22 ); apex of timbal cover directed to the base of hindwings (Fig. 22 F View Figure 22 ); anterior margin of ventral sclerotized expansion of theca without a slender projection (Fig. 22 M View Figure 22 ) A. viridinotatus sp. nov. 9 Apex of timbal cover almost reaching the lateral metascutellar plate (Fig. 6 F View Figure 6 ); basal lobe of pygofer almost reaching the apex of ventral apophyses (Fig. 6 J View Figure 6 ) A. charrua sp. nov. - Apex of timbal cover distant from the lateral metascutellar plate (Fig. 13 F View Figure 13 ); basal lobe of pygofer longer than the ventral apophyses (Fig. 13 J View Figure 13 ) A. faustopsaltrius sp. nov. 10 Anterior margin of head tightly concave (Fig. 14 B View Figure 14 ); operculum not covering the timbal cavity and the apex not reaching the auditory capsule (Fig. 14 E View Figure 14 ) A. iara sp. nov. - Anterior margin of head slightly concave (Fig. 19 B View Figure 19 ); operculum covering the timbal cavity and the apex reaching the auditory capsule (Fig. 19 E View Figure 19 ) 11 11 Timbal cover wide, almost covering the timbal cavity (Fig. 17 F View Figure 17 ); sternite VII sub-rectangular (Fig. 17 G View Figure 17 ) A. olivarius sp. nov. - Timbal cover not covering the timbal cavity (Fig. 19 F View Figure 19 ); sternite VII sub-triangular (Fig. 19 G View Figure 19 ) 12 12 Tergites with pilus setae in both lateral margins of tergites 2 and 3 and in the anterior margin of tergite 6 (Fig. 10 A View Figure 10 ); gutter of operculum slender present in all margins (Fig. 10 E View Figure 10 ) A. densusus comb. nov. - Tergites without pilus setae in both lateral margins of tergites 2 and 3 and in the anterior margin of tergite 6 (Fig. 19 A View Figure 19 ); gutter of operculum broad present in all margin (Fig. 19 E View Figure 19 ) A. rubemi sp. nov