Cangshanaltica marginata, Damaška & Ruan & Fikáček, 2022

Damaška, Albert František, Ruan, Yongying & Fikáček, Martin, 2022, The genus Cangshanaltica (Coleoptera: Chrysomelidae: Alticinae): overview, new species, and notes on species complexes, Zootaxa 5219 (1), pp. 49-64 : 57-58

Cangshanaltica marginata sp. nov.

Figs 6 , 8F

Type locality: China, Yunnan, 24°29′31″N 98°52′57″E

Type material. HOLOTYPE (male, DEIM): (1) CHINA (Yunnan), Dehong Dai Aut. Pref., mount. range 31 km E Luxi , 2280 m, 24°29′31″N / 98°52′58″E (grassland/pasture, under shrubs, moss/litter, sifted) 3. VI. 2007 D. W. Wrase [19A]; (2) HOLOTYPE Cangshanaltica marginata sp. nov., Damaška, Ruan, Fikáček des. 2020. ◉ Paratypes (1 male, 2 female UABG, 1 male, 1 female NMPC, 1 female ADPC) have same labels as holotype .

Differential diagnosis. The species can be distinguished from all other known Cangshanaltica species by its coloration—elytra black with fulvous margin. Additionally, it can be distinguished from all other known species by the shape of the aedeagal apex (widened with a narrow tip).

Description.

Habitus. Body oblong-ovate, convex, holotype 1.8 mm long, 1.2 mm wide, 1 mm high. Head and pronotum brown, elytra black with elytral suture brown, basal and humeral margins of elytra with wide yellow spots, lateral elytral margins and apices of elytra yellow. Ventral side of head and prothorax light yellowish brown, ventral side of mesothorax, metathorax and abdomen brown.

Head. Nearly hypognathous. Labrum pitchy black, widely, but not deeply incised. Maxillary and labial palpi brown. Clypeus and frons light brown, feebly pilose, frontal ridge absent. Suprafrontal sulcus shallow, frontal calli almost indistinct. Orbital and supraorbital sulci developed but shallow. Orbit and space around eyes slightly darker than vertex and frons in some specimens. Vertex shiny, almost impunctate. Eyes round. Antennae reaching basal ¼ of elytra. Antennomeres I–V and XI light brown, antennomeres VI–X dark brown. Antennomere VII slightly protruded.

Thorax. Pronotum wide, convex, impunctate. Anterolateral pronotal setiferous pore placed in the middle of lateral pronotal margin. Elytra slightly, irregularly punctured. Humeral part of lateral elytral margin and basal elytral margin with two wide light brownish yellow spots; lateral elytral margin with a wide yellowish-brown stripe; pleura brown. Elytral apices yellow. Procoxal cavity widely open posteriorly; prosternal intercoxal process elevated ventrally. Anterior metaventral process completely covered by mesoventrite between mesocoxae, with a deeply excavated, upturned U-shaped “horseshoe-like” structure. Legs brown. Tibiae feebly but distinctly pilose. Metatibiae slightly curved laterally, with a long apical spine. Metatarsomere I not strongly elongated.

Abdomen. Ventrites slightly pilose. Abdominal ventrite I with a bulbose anterior process reaching the space between metaxoxae, with a slightly elevated ridge. Abdominal ventrite V slightly paler than ventrites I–IV.

Genitalia. Median lobe of aedeagus short, wide and slightly curved in lateral view; in ventral view slightly widened towards apex in basal 2/3, apical 1/3 of median lobe of aedeagus narrowing, triangular, apex narrowly rounded. Spermatheca slender; spermathecal pump short, receptacle elongate-oval, spermathecal duct shortly Ushaped, without coils, ending in ½ of the receptacle. Vaginal palpi short, joined basally, V-shaped, slightly separated apically. Tignum slender.

Etymology. The species is named after its specific elytral color pattern—black with yellow lateral margin ( marginata —with notable margin).

Figures

FIGURE 6. Cangshanaltica marginata sp. nov. A—dorsal view; B—lateral view; C—ventral view, D—median lobe of aedeagus from dorsal view; E—median lobe of aedeagus from lateral view, F—median lobe of aedeagus from ventral view; G—spermatheca; H—vaginal palpi; I—tignum.

FIGURE 8. Lateral margin of pronotum with the setiferous pore placed almost in the middle—a diagnostic character shared by all known Cangshanaltica species (marked by white arrow in every picture): A—C. castanea; B—C. fuanensis; C—C. guanxiensis; D—C. javana; E—C. luzonica; F—C. marginata; G—C. mindanaoensis; H—C. nigra; I—C. siamensis; J—C. sprynari;, K—C. sp. from Taiwan similar to C. ogatai; L—Ivalia viridipennis with the setiferous pore placed in the apical part of pronotal margin.