Du'an Karst of Guangxi: a kingdom of the cavernicolous genus Dongodytes Deuve (Coleoptera, Carabidae, Trechinae) Author Tian, Mingyi Author Yin, Haomin Author Huang, Sunbin text ZooKeys 2014 454 69 107 http://dx.doi.org/10.3897/zookeys.454.7269 journal article http://dx.doi.org/10.3897/zookeys.454.7269 1313-2970-454-69 9A22E524BD38402FABDC506BC238CF94 9A22E524BD38402FABDC506BC238CF94 Taxon classification Animalia Coleoptera Carabidae Genus Dongodytes Deuve Dongodytes Deuve, 1993: 292 Type species. Dongodytes fowleri Deuve, 1993: 292 Type locality. Jiabao Dong, in Bama County, northwestern Guangxi ( Ueno 1998). Diagnostic characters of the genus. Members of Dongodytes share the following combined characters: elytra remarkably elongate though much wider than prothorax and without shoulders; eyes completely effaced and depigmented; body especially head and prothorax strongly elongate; frontal furrows very short, mandibles long and slender, right mandible bidentate, palps and antennae very elongate and thin; propleura strongly tumid, visible from above; pronotum much longer than wide; elytra depressed medially on humeral parts, anterior and preapical dorsal pores present or not, humeral set of marginal umbilicate pores not aggregated, 1st pore widely located from 2nd and 3rd which are close to each other, 1st to 3rd more or less adjoining marginal gutter, 4th distinctly dorsal wards located and far from marginal gutter; 5th and 6th of middle set are close to each other; legs thin and very long, tarsi slender; protarsi not distinctly modified in male. Male genitalia are strongly diversified in Dongodytes and could be important character states for phylogenetic analysis of the genus. Three types of the median lobe can be recognized. Type I, species of the subgenus Dongodytes (s. str.) which are known only from Du'an Karst, the median lobe is very short and stout, basal orifice very large, but with a very small, sometimes indistinct, sagittal aileron, and the parameres are broader (Figs 33-38); Type II, species of the subgenus Dongodytodes , which are all known from Du'an Karst, the median lobe is very elongate and thin, basal orifice comparatively small, but with a large sagittal aileron, and slender parameres (Figs 39-46); Type III, species of Dongodytes (s. str.) which are all known from other counties rather than Du'an : the median lobe is intermediately shaped between the two patterns described above, moderately elongate, rather stout, and with a large sagittal aileron; in particular, the median lobe distinctly curved at apex ( Deuve 1993 : Fig. 2; Ueno 1998: Figs 1-4). Systematic position of Dongodytes . Dongodytes is one of the most modified troglobiomorphic genera of trechines in the world. To determine the taxonomic position of Dongodytes within the tribe Trechini remains a challenge. Vigna Taglianti (1997) and Ueno (1998) suggested it may be allied to the European Aphaenops series, contrary to Deuve (1993) who compared Dongodytes with Sinaphaenops Ueno & Wang, 1991. Because recent study based on molecular phylogenetic analysis have clearly demonstrated that the Aphaenops series in the widest and traditional sense are restricted to the Pyrenean lineage ( Faille et al. 2010 , 2013 ), we agree with Deuve's opinion. Dongodytes seems to be allied to its Chinese congeners such as Sinaphaenops and Pilosaphaenops Deuve & Tian, 2008. For example, by having very short frontal furrows, very elongate genae and slender neck constriction, the head structures of Dongodytes are more or less similar to those of Sinaphaenops and Pilosaphaenops . Furthermore, all of the above genera have similar prothorax although latero-marginal setae are always absent in Sinaphaenops and Pilosaphaenops . Geographical distribution. Endemic to northwestern Guangxi (Fig. 73). Members of Dongodytes are recorded from several counties of Hechi Prefecture. However, only a single species is known in each of Bama, Fengshan, Tian'e and Dahua Counties, respectively. On the other hand, majority of the species (eight) are distributed in Du'an County. Thus, it is clear that, from the present knowledge, all species of Dongodytes are distributed in a very limited area of the river Hongshui He drainages in northwestern Guangxi. The river acts as a natural barrier for dispersal of Dongodytes at only a specific level. The nominate subgenus Dongodytes (s. str.) covers a larger distribution range than the subgenus Dongodytodes which is restricted to Du'an Karst in the eastern or northern bank of Hongshui He. Taxonomic treatment. Species of Dongodytes are divided into two subgenera, Dongodytes (s. str.) Deuve and Dongodytodes Tian. Both subgenera can be separated each other by shape of head, length of antennae, body pubescent or not, and chaetotaxal pattern on head, pronotum, elytra, and abdominal ventrite VII of male ( Tian 2011 ). See the following key for details. Key to subgenera and species of Dongodytes Deuve

8101619 Dongodytes elongatus rd625 Dongodytes	2
11152024rd726 Dongodytodes	8
Dongodytes (s. str.) giraffa Ueno
3
4
5
rd	Dongodytes (s. str.) elongatus sp. n.
rd	Dongodytes (s. str.) lani sp. n.
6
7
Dongodytes (s. str.) fowleri Deuve
Dongodytes (s. str.) grandis Ueno
1627	Dongodytes (s. str.) baxian Tian
1930	Dongodytes (s. str.) troglodytes sp. n.
9
10
2111	Dongodytes (Dongodytodes) jinzhuensis sp. n.
2212	Dongodytes (Dongodytodes) inexpectatus sp. n.
2031	Dongodytes (Dongodytodes) deharvengi Tian
11
13144344	Dongodytes (Dongodytodes) brevipenis sp. n.
134546	Dongodytes (Dongodytodes) yaophilus sp. n.

Figures 6-7. Elytral chaetotaxal patterns in Dongodytes . 6 Dongodytes (s. str.) lani sp. n. 7 Dongodytes (Dongodytodes) jinzhuensis sp. n. Figures 8-11. Habitus of Dongodytes species. 8 Dongodytes (s. str.) elongatus sp. n. female, paratype 9 Dongodytes (s. str.) troglodytes sp. n. male, holotype 10 Dongodytes (s. str.) lani sp. n. female, paratype 11 Dongodytes (Dongodytodes) jinzhuensis sp. n. female, paratype, from Jinzhu Dong I. Scale bar: 1.0 mm. Figures 12-15. Habitus of Dongodytes species. 12 Dongodytes (Dongodytodes) inexpectatus sp. n. male, holotype 13 Dongodytes (Dongodytodes) brevipenis sp. n. male, paratype, from Longwan: Nongqu Dong 14 ibid, from Chengjinag: Diaomao Dong 15 Dongodytes (Dongodytodes) yaophilus sp. n. female, paratype. Scale bar: 1.0 mm. Figures 16-24. Head of Dongodytes species. 16 Dongodytes (s. str.) baxian M, male, holotype 17 Dongodytes (s. str.) elongatus sp. n. male, holotype 18 Dongodytes (s. str.) lani sp. n. male, holotype 19 Dongodytes (s. str.) troglodytes sp. n. male, holotype 20 Dongodytes (Dongodytodes) deharvengi , male, holotype 21 Dongodytes (Dongodytodes) jinzhuensis sp. n. female, paratype 22 Dongodytes (Dongodytodes) inexpectatus sp. n. male, holotype 23 Dongodytes (Dongodytodes) brevipenis sp. n. male, holotype 24 Dongodytes (Dongodytodes) yaophilus sp. n. male, holotype. Figures 25-26. Abdominal ventrite VII of Dongodytes in male. 25 Dongodytes (s. str.) lani sp. n., paratype 26 Dongodytes (Dongodytodes) jinzhuensis sp. n., paratype. Figures 27-32. Basal parts of prothorax and elytra of subgenus Dongodytes (s. str.). 27 Dongodytes (s. str.) baxian , male, holotype 28 Dongodytes (s. str.) elongatus sp. n., male, holotype 29 Dongodytes (s. str.) lani sp. n., female, paratype 30 Dongodytes (s. str.) troglodytes sp. n., male, holotype 31 Dongodytes (Dongodytodes) deharvengi Tian, male, paratype 32 Dongodytes (Dongodytodes) jinzhuensis sp. n., female, paratype. Figures 33-38. Male genitalia of Dongodytes (s. str.) species (median lobe and parameres in lateral view, apical part of median lobe in dorsal view). 33-34 Dongodytes (s. str.) elongatus sp. n. 35-36 Dongodytes (s. str.) lani sp. n. 37-38 Dongodytes (s. str.) troglodytes sp. n. Figures 39-46. Male genitalia of Dongodytes (Dongodytodes) species (median lobe and parameres in lateral view, apical part of median lobe in dorsal view). 39-40 Dongodytes (Dongodytodes) jinzhuensis sp. n. 41-42 Dongodytes (Dongodytodes) inexpectatus sp. n. 43-44 Dongodytes (Dongodytodes) brevipenis sp. n. 45-46 Dongodytes (Dongodytodes) yaophilus sp. n.