Neaenus hystricosus, Andrew Hamilton, K. G., 2016

Andrew Hamilton, K. G., 2016, Neotropical spittlebugs related to Neaenini (Hemiptera, Cercopidae) and the origins of subfamily Cercopinae, Zootaxa 4169 (2), pp. 201-250 : 220-222

Neaenus hystricosus sp. nov.

Etymology. hystricosus (adj.), thorny.

Diagnosis. Male theca with marginal spines surrounding apical half of shaft in caudal aspect ( Fig. 47 C).

Description. Head and dorsum black, venter and tegmina dark brown, usually varied with orange on base of clavus (as in type, Fig. 10 B) or pale brown on base of clavus and/or costa. Male pregenital tergite lobes slender, curved ventrad, sternite with spiny lobe just before genital capsule ( Fig. 47 A); subgenital plates with prominent lobe on dorsal side of basal half, as in Tropidorhinella inflata (Jacobi) ; styles broadly furcate at tip, as in genotype; phallobase large, with thick upper lobe; theca strongly curved on basal half, apical third with triangular lobes directed cephalad ( Fig. 47 B). Length: male 5.7–6.4 [holotype] mm, female 6.9 mm.

Types. Holotype male, MEXICO: Sin. ─Sta. Lucia, 4 Aug. 1964 (L.A. Kelton). Paraptypes: 2 males, same data as holotype ; 1 male, Sin. ─ Portrerillos , 15 mi W El Palmito, 5000' [ASL], 4 Aug. 1964 (J.F. McAlpine) ; 1 female, same locality, 9 Aug. 1964 (L.A. Kelton). All types No. 24222 in CNCI .

Remarks. The spiny thecal tip and lobate subgenital plates are characteristic of Tropidorhinella Schmidt , but the styles, pregenital tergal lobes and shape of the pronotum show that these genera are not related. This species is 3% divergent from the lineage to which belongs an undescribed female (also from Sinaloa in Mexico).

Neaenus natrix sp. nov.

Etymology. natrix (noun in apposition), water-snake.

Diagnosis. Styles broad at midlength, constricted on apical third and serpentine, hooked ventrad at tip ( Fig. 46 A).

Description. Male black with eyes brown to crimson, two elongate ivory spots on costa (often connected into a wavy line, as in the type) and with coxae plus hind tibia and tarsi pale brown; female colored as in N. hystricosus but with reddish eyes and wing markings as in male. Antenna with 10 pits clustered at tip of postpedicel and short, peglike basiconic sensillum ( Fig. 21 B), Male pregenital tergite lobes slender, curved upwards, longer than those in N. varius and not spatulate at tips; subgenital plates tapered, directed caudad; phallobase short, with slender dorsal process ( Fig. 46 B); theca evenly curved cephalad, laterally compressed, armed only with low spiculate lobes near midlength, most clearly visible in caudal aspect ( Fig. 46 C). Length: male 5.2 [holotype] – 5.6 mm, female 6.2–6.5 mm.

Types. Holotype male, MEXICO: Chis.─ Zontehuitz , nr. S[an] Crist [obal], 9500', 27 May 1969 (W.R.M. Mason) . Paratypes: 1 male, 4 females, same data as holotype ; 1 female, Mt. Tzantehuit , 3000m, 17 May 1969 (J.M. Campbell). All types No. 24223 in CNCI .

Remarks. The short basiconic sensillum and serpentine style tip without setae are shared with the following new subgenus, from which lineage this species is only 2% divergent.

Figures

FIGURES 46 – 54. Male genitalia of nominate genus of Neaenini (46 – 49) and nominate subgenus of Microsarganini (50 – 54): 46, Neaenus natrix; 47, N. hystricosus; 48, N. (Neaniskus) gilli; 49, Helioptera gilvum; 50, Microsargane vittata; 51, M. apicata; 52, M. ornatipennis; 53, M. mutans; 54, M. cristata. A, lateral aspect of genital capsule and style; B, same, of theca; C, same in caudal aspect (with detail in Microsargane showing tips of processes in widest aspect); D, ventral aspect of subgenital plates, smaller scale; E, style, dorsal aspect.

FIGURES 10 – 11. Neaenus Fowler, dorsolateral aspect (10) and female genitalia, ventral aspect (11). 10 A, N. varius Fowler; 10 B, N. hystricosus sp. nov.; 10 C, undescribed female from 15 mi east of El Palmito in Mexico; 10 D, N. natrix sp. nov.; 10 E – F, 11 A, N. (Neaniskus) gilli sp. nov.; 10 G – H, 11 B, N. (Neaniskus) zacki sp. nov..

FIGURES 20 – 23. Antennal characters of Neaenini: 20, Neaenus varia; 21, N. natrix, showing small peglike supernumerary sensillum; 22 A, N. (Neaniskus) zacki; 23, N. (Neaniskus) gilli: (A) female from type-locality, showing small bladelike sensillum; (B), same, male holotype; (C), same, enlargement of sensory pits; (D), same as 23 A but specimen collected by B. Gill, showing prominent bladelike sensillum; (E – F), same, from other angles.