Carpiradialis pueblensis Ni~ no-Maldonado and Clark, 2020

Niño-Maldonado, Santiago & Clark, Shawn M., 2020, Carpiradialis, New Genus, and Two New Species from Mexico (Coleoptera: Chrysomelidae: Galerucinae), The Coleopterists Bulletin 74 (3), pp. 563-571 : 565-567

Carpiradialis pueblensis Ni~ no-Maldonado and Clark , new species

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( Figs. 1A–C , 3A–C, G )

Diagnosis. This species is much larger than the only other known species of the genus (5.1–7.0 vs. 3.0– 3.2 mm long), and the elytra are weakly costate and distinctly vittate, with a pale area between the posthumeral vitta and the epipleuron ( Figs. 1A, C ). Moreover, the prolongation of the male hind tibia is apically truncate ( Fig. 3G ), and the aedeagus is apically bilobed ( Figs. 3A, B ).

Description of Holotype (Male). Form elongate oval; length 5.1 mm; width 2.3 mm across elytral humeri, 2.3 mm at mid-length of elytra, 2.1 mm at base of elytral declivity. Color largely yellow, but with dark pronotal maculae and elytral vittae (as in Figs. 1A–C ).

Head largely yellow, but with vertex black; apices of mandibles, as well as distal palpomere of maxillae and labium, black. Vertex very finely punctate, with punctures hidden among alutaceous microsculpture; sulcus along upper margin of eye equipped with long, white setae; frontal calli subtriangular, poorly defined laterally, 0.3 mm long, 0.1 mm wide, largely separated from each other by wide frontal carina, but nearly contiguous dorsoposteriorly, hardly elevated above plane of flat frontal carina; antennal fossae circular, 0.2 mm in diameter, separated from each other by distance subequal to diameter; gena very short, with length less than width of distal maxillary palpomere. Each eye 0.5 mm long, 0.3 mm wide; interocular distance equal to 0.64 maximum width of head. Labrum yellow, subtrapezoidal, 0.4 mm long, 0.6 mm wide; six setae present distally, three on each side. Basal palpomeres of maxillae and labium with abundant long setae.

Antennae nearly filiform, extending slightly beyond middle of elytra, each measuring 3.6 mm in total length. Antennomeres 1–3 dark brown dorsally, yellow ventrally; antennomeres 4–11 black, covered with many appressed setae, with a few white, erect setae. Antennomere lengths (mm) from 1 to 11 as follows: 0.5, 0.2, 0.4, 0.4, 0.4, 0.3, 0.3, 0.3, 0.3, 0.3, 0.3.

Pronotum transverse, slightly arched, widest ( 1.6 mm) slightly anterior to mid-length, less wide ( 1.5 mm) near posterior margin, narrowest ( 1.4 mm) near anterior margin (head therefore 0.3, 0.1, or 0.4 mm narrower than prothorax, depending on point of measurement); surface smooth; anterior and posterior margins lacking bead, but with many short, white setae; lateral margin clearly carinate, sparsely setose; color yellow, with five black spots (as in Fig. 1A ); lateral spots largest, 0.7 mm long, 0.4 mm wide; small spot ( 0.2 mm long, 0.2 mm wide) present mesally between bases of lateral spots; beginning between distal portion of lateral spots and thence extending anteriorly, two additional spots present, each 0.4 mm long, 0.3 mm wide. Scutellar shield black, impunctate, shining, subquadrate, 0.3 mm long, 0.4 mm wide.

Elytral length 3.8 mm; combined width 2.3 mm across humeri, 2.1 mm at mid-length, 2.1 mm at base of distal declivity. Humeral calli well developed; basal calli discernible, although poorly differentiated; area behind calli with several weak, longitudinal costae. Surface smooth, mostly glabrous, but with a few scattered, white setae on distal declivity. Color largely yellow, each elytron with two black vittae; first vitta subsutural, well defined, extending from scutellar shield to elytral apex, 0.4 mm wide along much of length, narrower on distal declivity; second vitta 0.4 mm wide, extending from base of humeri to distal declivity, broadly separated from apex and epipleuron. Epipleuron visible in lateral view; basal third pale yellow, broad; distal portion narrow, dark brown to black, with sporadic white setae.

Venter largely yellow, lateral areas of metathorax darker. Pro-and mesothoraces largely glabrous; metathorax covered with long, dense, white setae. Procoxal cavities open posteriorly. Abdomen medially glabrous or with a few white setae, elsewhere covered with long, white setae; terminal ventrite with a deep medial impression, and apically with rectangular lobe.

Legs largely yellow; metathoracic tibiae darker, with apices nearly black; metathoracic tarsi nearly black. Front femur 1.2 mm long; front tibia 1.4 mm long; middle femur 1.2 mm long; middle tibia 1.4 mm long; hind femur 1.6 mm long; hind tibia 1.7 mm long, with blade-like prolongation distally ( Fig. 3G ). Terminal spur absent from front and middle tibiae, present on hind tibia. Basal tarsomere of front and middle legs swollen, subrectangular, with shiny, ventral adhesive pad; basal tarsomere of hind leg narrowly triangular, slightly broadening from base to apex, without ventral adhesive pad. All legs covered with long white setae, most abundant on the tibiae and tarsi.

Aedeagus symmetrical in dorsal view, abruptly narrowed slightly before bilobed apex, with lateral preapical incisions ( Fig. 3A ); length 1.7 mm; width 0.3 mm. In lateral view, aedeagus curved ( Fig. 3C )

( 0.4 mm from dorsal edge at highest point to imaginary line from apicoventral tip to basoventral extreme).

Variation. The body size varies considerably, from 5.1 to 7.0 mm long. In some specimens, the basomedial spot of the pronotum is only vaguely indicated. In females, all tibiae are equipped with a terminal spur; the basal tarsomere of all legs is narrowly triangular, slightly broadening from base to apex and with the ventral surface densely setose and not shiny; the remarkable prolongation of the hind tibia is lacking; and the abdominal apex is rounded or slightly pointed.

Holotype. “ MEXICO: Puebla \ Mpio: Zapotitlán Salinas \ 1 km N San Juan Raya \\ 18° 190 1100, 97° 360 5000 \ 19-vii-2011, R. Jones \ 1755 m, Matorral” ( male, BYUC) .

Paratypes. Same data as holotype ( 1 female, BYUC; 1 female, FIC-UAT) ; MEXICO, Puebla, Municipio Zapotitlán Salinas, 2 km S. La Venta , 18- VII-2011, R. W. Jones ( 1 female, FIC-UAT) .

Etymology. The specific epithet refers to the Mexican state of Puebla, where the specimens in the type series were collected.

Comments. Although much larger and differently colored than the only other known species of the genus, the prolongation of the male hind tibia is quite similar for the two species. The general appearance of the insects and basic form of the aedeagi are also similar.

Figures

Fig. 1. Carpiradialis pueblensis, new species, holotype. A) Dorsal aspect, B) Ventral aspect, C) Lateral aspect.

Fig. 3. Carpiradialis species. C. pueblensis, new species, aedeagus: A) Dorsal aspect, B) Ventral aspect, C) Lateral aspect. C. tamaulipensis, new species, aedeagus: D) Dorsal aspect, E) Ventral aspect, F) Lateral aspect. Hind leg of male, distal portion of tibia and basal portion of tarsus: G) C. pueblensis, new species, H) C. tamaulipensis, new species.