Argopistes jungchani, Lee & Chiang & Suenaga, 2024

Lee, Chi-Feng, Chiang, Ming-Yao & Suenaga, Haruki, 2024, The genus Argopistes Motschulsky from Japan and Taiwan, with descriptions of three new species from Taiwan (Coleoptera, Chrysomelidae, Galerucinae, Alticini), ZooKeys 1215, pp. 151-183 : 151-183

Argopistes jungchani sp. nov.

Figs 11 A, B , 12

Type material examined.

Holotype • ♂ ( TARI). Taiwan. Pingtung: Jinshuiying (浸水營), 14. IV. 2021, leg. J. - C. Chen . Paratype • 1 ♀ ( TARI), same but with “ 27. VI. 2012 ” .

Diagnosis.

Adults of this new species are easily recognized by their color pattern: black bodies with yellowish-brown lateral margins of pronotum and elytra; also, genitalic characters are diagnostic: tube-like apex of aedeagus similar to that of A. tsekooni but parallel-sided from near apex to middle (Fig. 12 C ) (apically narrowed from near apex to middle (Fig. 9 C ) in A. tsekooni ), paired elongate tectum small, 0.76 as long as anterior opening (Fig. 12 C ) (paired elongate tectum long, 0.85 as long as anterior opening (Fig. 9 C ) in A. tsekooni ), and anterior opening from apical 1 / 13–2 / 5 (Fig. 12 C ) (anterior opening from apex to apical 2 / 5 (Fig. 9 C ) in A. tsekooni ); only two pair of long setae on apical margin of abdominal ventrite VIII (Fig. 12 E ) in females (more than two pair of setae on apical margin of abdominal ventrite VIII in females of other species), and cylindrical gonocoxae (Fig. 12 G ).

Description.

Length 3.5–3.6 mm, width 2.7–2.9 mm. Color (Fig. 11 A, B ) blackish brown, sides of pronotum and elytra paled, tarsi, front femur and tibiae, and antennae yellowish brown. Pronotum broad, convex, lateral margin narrowly explanate; 2.3 × wider than long, disc with dense coarse punctures; lateral margin rounded, anterior margin strongly concave, posterior margin moderately convex. Elytra broadly oval, 1.1 × longer than wide, disc with fine punctures arranged into longitudinal lines, confused, dense, fine punctures present between longitudinal punctures.

Male. Antenna filiform (Fig. 12 A ), antennomere I much longer than others, approximate ratios of length of antennomeres I – XI 1.0: 0.5: 0.3: 0.5: 0.5: 0.5: 0.5: 0.5: 0.5: 0.5: 0.6; approximate ratios of length to width of antennomeres I – XI 4.4: 2.2: 1.9: 2.6: 2.3: 2.2: 1.9: 1.8: 1.7: 1.7: 2.6. Aedeagus (Fig. 12 C, D ) parallel-sided, strongly and subapically narrowed, apex tube-like and extremely small; anterior opening small, ~ 0.30 as long as aedeagus, from apical 1 / 13–2 / 5; tectum composed of one pair of sclerotized processes, large, ~ 0.76 as long as anterior opening; wide and slightly curved in lateral view; paired processes apically curved in lateral view; endophallic sclerite laterally flattened, with basal processes slightly sclerotized.

Female. Antenna (Fig. 12 B ) much smaller than in males, ratios of length of antennomeres I – XI 1.0: 0.4: 0.3: 0.3: 0.3: 0.3: 0.3: 0.4: 0.4: 0.4: 0.6; ratios of length to width of antennomeres I – XI 4.2: 1.8: 1.8: 1.6: 1.7: 1.5: 1.5: 1.7: 1.6: 1.4: 2.3. Ventrite VIII (Fig. 12 E ) membranous, only apical margin sclerotized, T-shaped, with two pairs of short setae at sides of apical margin, apical margin truncate, spiculum long. Spermathecal receptaculum (Fig. 12 F ) much longer than pump, moderately swollen; pump slightly emarginate at inner side of base; spermathecal duct with long basal part, ramus rounded. Gonocoxae (Fig. 12 G ) cylindrical and separated, base membranous, each gonocoxa symmetric, with dense long setae along apical and outer margin.

Host plant.

Unknown

Biology.

Unknown.

Etymology.

This new species is named for Jung-Chan Chen (陳榮章), the first person to collect specimens.

Distribution.

Only known from the type locality (Fig. 5 ).

Figures

Figure 5. Distribution map of Argopistes species in Taiwan, solid line: 1000 m, broken line: 2000 m. Red dots A. rufus Chen; blue dots A. biplagiatus Motschulsky; green dots A. tsoui sp. nov.; orange dots A. yuae sp. nov.; purple dot A. jungchani sp. nov.

Figure 9. Argopistes tsekooni Chen A antenna, male B antenna, female C aedeagus, dorsal view D aedeagus, lateral view E abdominal ventrite VIII, female F spermatheca G gonocoxae.

Figure 11. Habitus of Argopistes species A A. jungchani sp. nov., female, dorsal view B ditto, lateral view C A. tsoui sp. nov., male, dorsal view D ditto, ventral view E ditto, lateral view.

Figure 12. Argopistes jungchani sp. nov. A antenna, male B antenna, female C aedeagus, dorsal view D aedeagus, lateral view E abdominal ventrite VIII, female F spermatheca G gonocoxae.