Sphaeroplotina Miyatake, 1969

Tong, Junbo, Chen, Jianjun, Zhang, Xiaoning, Chen, Xiaosheng & Wang, Xingmin, 2020, A contribution to the genus Sphaeroplotina Miyatake (Coleoptera, Coccinellidae Plotinini), Zootaxa 4859 (3), pp. 419-428 : 420-421

publication ID	https://doi.org/ 10.11646/zootaxa.4859.3.7
publication LSID	lsid:zoobank.org:pub:FBE58722-AAD9-4370-9ED5-6F3BF2F13FED
DOI	https://doi.org/10.5281/zenodo.4413218
persistent identifier	https://treatment.plazi.org/id/DB6A7053-FF00-B103-5FA4-FCCB6DEFD3C0
treatment provided by	Plazi
scientific name	Sphaeroplotina Miyatake, 1969
status

Treatment

Genus Sphaeroplotina Miyatake, 1969

Chinese name: ṞÖümw

Sphaeroplotina Miyatake 1969: 202 ; 1994: 281.

Type species: Sphaeroplotina hainanensis Miytake, 1969 .

Diagnosis. Sphaeroplotina is similar to Plotina , but can be distinguished from the latter as follows: body rounded and nearly hemispherical ( Figs 1 View FIGURE 1 a–c, 3a–f); terminal palpomere parallel-sided, apically slightly narrowed ( Figs 1i View FIGURE 1 , 3i View FIGURE 3 ); ventrite 7 in male broadly and deeply emarginate at apex ( Figs 5 View FIGURE 5 a–b); elytral epipleuron reaching the elytral apex ( Figs 1d View FIGURE 1 , 4g View FIGURE 4 ). In Plotina : body oval; terminal palpomere strongly dilated; ventrite 7 in male subtruncate medially at apex ( Figs 5 View FIGURE 5 c–d); elytral epipleuron distinctly incomplete.

Description. Body rounded, nearly hemispherical, dorsal surface glabrous ( Figs 1 View FIGURE 1 a–c, 3a–f).

Head exposed dorsally, comparatively small ( Figs 1c View FIGURE 1 , 3c, 3f View FIGURE 3 ). Eyes dorsally 0.4–0.5× length of head capsule, with ocular canthus extending slightly into eyes ( Fig 4c View FIGURE 4 ). Frons wide and flat, not emarginate. Antennae relatively long and stout, with 10 antennomeres: antennomere 1 large and bent; 2 shorter and narrower than 1; 3 somewhat triangular, distinctly longer than wide; 4–6 as wide or wider than long; 7 transverse, broadening apically, forming a short support for club; 8–10 gradually dilated, forming an elongate oval club. Antennomere 10 rounded apically ( Figs 1f View FIGURE 1 , 4b View FIGURE 4 ). Clypeus narrowing anteriorly, with anterior margin straight. Labrum partially hidden under clypeus, transverse ( Fig. 4d View FIGURE 4 ). Mandible robust, with a subapical tooth just behind apical tooth, molar teeth in both mandibles are asymmetrical ( Figs 1 View FIGURE 1 g–h, 4f–g). Maxilla with cardo short; palpomere 2 subquadrate; palpomere 3 quadrate to weakly transverse; terminal palpomere elongate parallel-sided, apically obliquely truncate and sometimes slightly narrowed ( Figs 1i View FIGURE 1 , 3i View FIGURE 3 ). Labial palps with 3 palpomeres; apical palpomere as long as penultimate one; mentum trapezoidal, narrowed basally ( Figs 1j View FIGURE 1 , 4e View FIGURE 4 ).

Pronotum strongly convex; anterior margin broadly and rather deeply emarginate; anterior angle of pronotum prominent; lateral edge smooth; basal marginal line along the edge distinct but incomplete ( Figs 1c View FIGURE 1 , 3c, 3f View FIGURE 3 ). Prosternum T-shaped with board lateral wings; prosternal process 0.7× coxal diameter, with arcuate carinae extended laterally ( Figs 1e View FIGURE 1 , 3h View FIGURE 3 ). Prosternum in front of coxae about 2× as long as basal width of prosternal process ( Figs 1e View FIGURE 1 , 3h View FIGURE 3 ). Procoxal cavity transverse.

Mesoventral process broad, 1.3–1.4× as wide as mesocoxal diameter, meso-metaventral junction forming a straight line, with suture visible ( Fig. 3g View FIGURE 3 ). Elytral epipleuron complete to apex, surface nearly horizontal and flat without distinct foveae ( Figs 1d View FIGURE 1 , 3g View FIGURE 3 ). Metaventrite with discrimen incomplete ( Fig. 3j View FIGURE 3 ). Protibia distinctly broadened without apical spurs, mid tibia with single apical spur, hind tibia with two apical spurs. Meso- and metatibiae slender, shallowly excavated for reception of tarsi, tarsi pseudotrimerous, tarsal claws simple without basal tooth ( Figs 1 View FIGURE 1 l–m, 3k–l, 4a).

Abdomen with five visible ventrites in both sexes; ventrite 1 slightly longer than ventrite 2, posterior margin straight or weakly arcuate; ventrite 7 in male broadly and deeply emarginate at apex ( Figs 5 View FIGURE 5 a–b). Abdominal postcoxal lines complete, strongly and unevenly curved, nearly reaching posterior margin of ventrite 1, with outer part of line subparallel to abdominal side, oblique dividing line absent ( Figs 1k View FIGURE 1 , 4h View FIGURE 4 ).

Distribution. China