Allopachria longyanensis Ji, Guo & Bian, 2014, sp. n.
Creators: name: Ji, Lanzhu
name: Guo, Cheng
name: Bian, Dongju
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Dytiscidae
Allopachria
Allopachria longyanensis

description: Allopachria longyanensis sp. n.
Type locality. China, Fujian Province, 30 km W Longyan City, 2 km S Dachi Village, 750 m.
Type material. Holotype, male: labeled “ CHINA: Fujian, Longyan City, 2 km S Dachi Village, 750 m, 28. I. 1997, leg. Schönmann, Ji & Wang (CWBS 262)”, “ Holotype, Allopachria longyanensis sp. n. ” [red printed label]. Paratype: 1 female, same data as holotype.
Description. Habitus: oblong-oval, distinctly convex (Fig. 1). Body length 2.25 mm, width 1.5 mm.
Head: reddish-brown, paler on clypeus, clypeal margin somewhat truncate medially, finely and sparsely punctate; anterior 1/3 microreticulate. Antennae yellowish testaceous, simple, not modified.
Pronotum: brown, lateral margins with fine beading; punctures irregular in size and distribution, in basal half larger and coarser, without microreticulation.
Elytron: dark brownish with two big yellowish-testaceous spots, one basal and one subapical, not reaching suture and lateral margin; punctures fine and sparse, almost regular in size, longitudinal rows of punctures rather indistinct; surface strongly shining, without microreticulation.
Ventral surface: epipleura and rest of surface reddish-brown; punctures on metaventrite, metacoxae, and abdomen fine and very sparse; without microreticulation. Legs reddish brown.
Male: median lobe of aedeagus in ventral view (Fig. 3) relatively broad and with sides almost parallel over entire length; apex with small protuberance; median lobe in lateral view as in Fig. 2; left paramere as in Fig. 4. Pro- and mesotarsomeres slightly enlarged.
Female: habitus, size and color as in male; pro-and mesotarsomeres not modified.
Comparison with other species. The following remarks relate only to males of Allopachria, because single females are almost impossible to identify sufficiently reliably. The new species belongs to a group of medium-sized species with more or less oval, apically not attenuated body shape and two distinct spots on each elytron. Because the male holotype of A. longyanensis sp. n. has unmodified antennomeres and protibiae, and not considerably enlarged pro- and mesotarsomeres, only five other species need to be treated in this comparison. These are A. bianae Wewalka, 2010, A. grandis Bian & Ji, 2010, A. liselotteae Wewalka, 2000, A. schoenmanni Wewalka, 2000, and A. weinbergeri Wewalka, 2000. The relatively broad and parallel-sided median lobe of A. longyanensis sp. n. (ventral view, see Fig. 3) readily distinguishes the new species from all five species mentioned above. The parameres are also totally different in the other species, except in A. bianae, but in addition to the differences in the median lobe, A. bianae has somewhat pronounced shoulders, a feature also present in A. weinbergeri. Some differences in the body shape and size as well as in the microreticulation on the head are less easy to observe and shall not be treated here in detail, in particular because we have only a single male at our disposal.
Etymology. This species is named after the Chinese city of Longyan. The specific epithet is an adjective in the nominative singular.
Distribution. So far known only from the type locality: China: Fujian Province.
Habitat. Stream, ca. 1–2 m wide, with rocky steps, waterfalls and pools, with crystalline sand and coarse granitic gravel.
description: Published as part of Ji, Lanzhu, Guo, Cheng & Bian, Dongju, 2014, Allopachria longyanensis sp. n. from China (Coleoptera: Dytiscidae), pp. 194-196 in Zootaxa 3755 (2) on pages 194-195, DOI: 10.11646/zootaxa.3755.2.5, http://zenodo.org/record/228899