Coccinellini Latreille, 1807

Vandenberg, Natalia J., 2019, A new monotypic genus and new species of lady beetle (Coleoptera: Coccinellidae Coccinellini) from western South America, Zootaxa 4712 (3), pp. 413-422 : 414

Tribe Coccinellini Latreille, 1807

Neda -group (sens. Vandenberg 1992, Vandenberg & Gordon 1996, Vandenberg 2002; composed of Neda , Mononeda , Neoharmonia , the new genus described below, and various species misclassified in Cycloneda Crotch, 1871 )

( Figs. 1–4 , 11–19 )

Diagnosis. Medium-sized to large Coccinellini (3.5–12.4 mm) with cardioid, circular, slightly elongate oval, or escutcheonal (sub-triangular, heater-shaped) body form; elytral margins narrowly to broadly explanate; and meso-, metafemora not or only slightly projecting beyond elytral margin in dorsal view ( Figs. 1–4 , 11a ,d–14a,d). Male genitalia with apex of basal lobe (=penis guide sens. Ślipiński) bifid or acuminate ( Figs. 11 e–14e, 16); penis ( Fig. 15 ) with outer arm of basal capsule elongate conical or apically flared, resembling bell of trumpet and forming conduit for ejaculatory duct; inner arm of basal capsule (apodeme) short, weakly arcuate; subapical region of penis with twisted or threaded appearance; apex of penis lacking expanded membranous area bearing chitinous struts or spicuoles. Female genitalia ( Figs. 18–19 ) with sperm duct attached to dorsal end of bursa, enclosed in straight or sinuous tubular sheath (=infundibulum auctorum) for at least part of length; sheath rigid or with reduced flexibility. Spermatheca large, with curved cornu; nodulus typically well developed, but reduced in some; accessory gland large, half length of spermatheca or more; bursa membranous, lacking expanded sclerotized plate or reinforcing struts.

Figures

FIGURES 1–10. External morphology of lady beetles in the tribe Coccinellini. 1–4, Argosadalia priscilla sp. nov. habitus illustrations: 1–3, holotype, male (scale bar lower left): 1, dorsal; 2, lateral; 3, frontal; 4, paratype, female (scale bar upper right), dorsal. 5–6, A. priscilla sp. nov., ventral view of mouthparts: 5, labial prementum and palpi; 6, maxillary palp. 7–10, abdominal postcoxal lines: 7, A. priscilla sp. nov.; 8, Adalia bipunctata L., 1758; 9, Neoharmonia venusta (Melsheimer, 1847); 10, Coccinella sp.

FIGURES 11–14. Genera of the Neda-group, key characters drawn from exemplars of the type species of each genus: a, body form in dorsal view, males; b, diagrammatic view of venter, males, elytral epipleuron shown in red, abdominal ventrites in white; c, apex of abdomen, female, arrow points to hind margin of 4th ventrite; d, shape of elytra in cross-sectional view through widest part; e, basal lobe of male genitalia in ventral view rescaled to the same length for comparative purposes. Scale bar applies to figures in rows a–d. 11, Argosadalia priscilla sp. nov.; 12, Neoharmonia venusta Melsheimer, 1847; 13, Neda norrisii (Guérin-Méneville, 1844); 14, Mononeda marginata (L., 1767).

FIGURES 15–19. Genitalia of lady beetles in the Neda-group. 15–17, male genitalia of Argosadalia priscilla sp. nov.: 15, left lateral view of penis; 16, ventral view of phallobase; 17, right lateral view of phallobase. 18–19, Female genitalia in dorsal view, arrows to the right of each figure show the outer angle where the cornu joins the nodulus: 18, A. priscilla sp. nov.; 19, Neoharmonia venusta Melsheimer, 1847.