Signoretia tamdaoensis Dietrich & Nguyen & Pham 2020, n. sp.
Creators: name: Dietrich, Christopher H.
name: Nguyen, Huong T. T.
name: Pham, Hong Thai
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Cicadellidae
Signoretia
Signoretia tamdaoensis

description: Signoretia tamdaoensis n. sp.
(Figures 9, 11Z)
Description. Length of male 6.0 mm. Overall coloration pale yellow without distinct markings.
Head in profile with crown horizontal and face moderately convex, crown in dorsal view parabolically produced medially, basal width between eyes 1.5X medial length; crown surface concave, midline weakly carinate, lateral margin sharply carinate, submarginal carina obsolete. Pronotum slightly less than 3X longer than crown, slightly convex overall but slightly depressed medially and submarginally, evenly punctate except punctures less developed in pair of anterolateral depressions, lateral margin sharply carinate and slightly longer than eye. Front femur row IC with 9–12 fine setae. Hind tibia rows AD and AV each with 8 macrosetae.
Male pygofer quadrate in lateral view, with scattered fine setae, stout process arising posteroventrally, strongly divergent from lobe margin, curved dorsad and extended slightly dorsad of lobe, with several short stout scattered setae, apex acuminate. Segment X well sclerotized and extended beyond apex of pygofer lobe, with pair of retrorse spines arising near midlength and extended nearly to base. Subgenital plate extended well beyond pygofer, tapered from base to narrowly rounded apex, dorsolateral margin with row of short, fine setae and row of long, fine setae extended from near base to apex. Style apophysis moderately long, evenly curved ventrolaterad and tapered, with few scattered teeth. Connective somewhat elongate with bilobed base and slender stem articulated to aedeagus. Aedeagus with ventral preatrium bearing pair of elongate slender processes that cross each other near base and diverge distally in ventral view, each slightly expanded near middle then tapered to acute apex with dense patch of minute hairlike microtrichia dorsally near apex; aedeagal atrium expanded in posterior view with pair of large spinelike lateral processes extended dorsolaterad; shaft arising from dorsal part of atrium, short, arched, with unpaired ventral preapical spine extended ventrad; gonopore indistinct in distal unsclerotized area.
Etymology. The new species name refers to the type locality, Tam Dao.
Material examined. Holotype male, VIETNAM: Vinh Phuc, Tam Dao, 21.4509ºN 105.6325ºE, 741m, 12 July 2019, C.H.Dietrich, sweeping understory in 2º pine forest, VN19-8-1 (VNMN). Paratypes, 2 females, same data as holotype; 1 male, 2 females, VIETNAM: Vinh Phuc, Tam Dao, 21.4589ºN 105.6479ºE, 970m, 10 July 2019, C.H.Dietrich, Hg vapor light in forest, VN19-5-2 (INHS).
Notes. This species appears to be closely related to S. mishmiensis Viraktamath & Webb described from Myanmar but also known from southern China (Guangxi; Dietrich unpublished), which is nearly identical in external appearance and has similar male terminalia, including basally crossed aedeagal processes. The new species is easily distinguished by the presence of large spines on male abdominal segment X, a preapical ventral spine on the aedeagal shaft, and the hairlike microtrichia of the basal aedeagal processes restricted to a small area near the apex (Fig. 9G).
description: Published as part of Dietrich, Christopher H., Nguyen, Huong T. T. & Pham, Hong Thai, 2020, New genera, new species and new records of leafhoppers (Hemiptera: Cicadellidae) from Vietnam, pp. 241-273 in Zootaxa 4877 (2) on page 266, DOI: 10.11646/zootaxa.4877.2.2, http://zenodo.org/record/4424088