Allopachria grandis, Bian, Dongju & Ji, Lanzhu, 2010

Bian, Dongju & Ji, Lanzhu, 2010, Allopachria Zimmermann, 1924 from Jiangxi, China, with descriptions of two new species (Coleoptera: Dytiscidae), Zootaxa 2350, pp. 59-65 : 61

Allopachria grandis sp. nov.

( Figs 2 , 6–10 )

Type material. Holotype (IAECAS) male: CHINA: Jiangxi, Ganzhou City, Shangyou County, Wuzhifeng Town, 25°57.747’N 114°04.158’E, ca. 559 m, 6. X. 2009, leg. Bian & Tong (loc. 13). Paratypes: 3 males, 3 females (IAECAS), the same data as holotype; 2 females (IAECAS): CHINA: Jiangxi, Ji’an City, Suichuan County, Duiqian Town, 26°20.018’N 114°16.662’E, ca. 228 m, 2. X. 2009, leg. Bian & Tong (loc. 10); 1 male, 2 females (IAECAS): downstream of loc. 13, 7. X. 2009, leg. Bian & Tong (loc. 14).

Diagnosis. This species is closely related to A. liselotteae Wewalka , A. schoenmanni Wewalka and A. weinbergeri Wewalka , but can be distinguished from A. liselotteae and A. schoenmanni by the anterior 3/4 of head with microreticulation and the sub-apical spot of elytra large and edge-blurred, from A. weinbergeri by the last sternite without microreticulation, and from other related species by the distal part of parameres extremely enlarged.

Description. Body oblong-oval, moderately convex ( Fig. 2 ). Total length of body 1.95–2.25 mm, width 1.35–1.50 mm.

Head rufo-testaceous to ferrugineous; clypeus regularly rounded, without bead; with a distinct transverse depression behind the clypeal margin; punctures irregular in size and sparsely distributed, a little denser at basal half; anterior 3/4 finely microreticulate; antennae flavo-testaceous, moderately long and slender, not modified ( Fig. 10 ).

Pronotum ferrugineous, somewhat darker along the posterior margin; lateral margins a little paler, distinctly bordered; punctures strong, irregular in size and irregular in distribution, partly coarse, large-sized punctures mainly scattered on posterior third, becoming confluent, coarse and forming striation towards sides; anterolateral corner sharply angled, posterolateral corner a little pronounced towards apex; without microreticulation.

Elytra ferrugineous, with two flavo-testaceous spots, one sub-basal and one sub-apical; punctures fine, sparsely distributed; highly polished and shining; without microreticulation.

Ventral side. Epipleura and the rest of ventral side dark rufo-testaceous to ferrugineous; fine punctures sparsely distributed on metaventrite, metacoxae and on abdomen; without microreticulation.

Legs flavo-testaceous to rufo-testaceous. First protarsal and mesotarsal segments of males slightly enlarged ( Fig. 9 ).

Aedeagus. Penis as in Figs 6–7 , parameres as in Fig. 8 .

Females. Body length 2.10–2.15 mm, width 1.40–1.45 mm; head and pronotum totally microreticulate; first protarsal and mesotarsal segments not enlarged.

Distribution. China: Jiangxi.

Habitat. For a description of localities 13 and 10 see the habitat of Allopachria wuzhifengensis sp. nov.; the surrounding area of locality 14 is similar to locality 13.

Etymology. The specific name comes from the Latin word “grand” = “thick” and refers to the broad distal part of parameres.

Figures

FIGURES 1 – 2. Habitus and color pattern. 1. Allopachria wuzhifengensis sp. nov.; 2. Allopachria grandis sp. nov. Scale lines: 1 – 2 = 0.5 mm

FIGURES 3 – 12. Allopachria wuzhifengensis sp. nov., holotype: 3 – 5, 11 – 12; Allopachria grandis sp. nov., holotype: 6 – 10. 3, 6) Penis, in dorsal view; 4, 7) penis, in lateral view; 5, 8) paramere, in lateral view; 9, 11) right protarsus; 10, 12) antennae. Scale bars: 3 – 8 = 0.1 mm, 9 – 12 = 0.2 mm.