Dongodytes

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Taxonavigation

Ordo: Coleoptera
Familia: Carabidae

Name

Dongodytes Deuve – Wikispecies link – Pensoft Profile

• Dongodytes Deuve, 1993: 292

Type species

Dongodytes fowleri Deuve, 1993: 292

Type locality

Jiabao Dong, in Bama County, northwestern Guangxi (Uéno 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; Uéno 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 Uéno (1998) suggested it may be allied to the European Aphaenops series, contrary to Deuve (1993) who compared Dongodytes with Sinaphaenops Uéno & 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

Key to subgenera and species of Dongodytes Deuve — M. Tian , H. Yin , S. Huang

1		Antennae very long, extending over elytral apex (Figs 8–10), head more elongate, gradually narrowed posteriad, neck constriction long (Figs 16–19), posterior supraorbital setae present or not, head and pronotum glabrous or covered with sparse long and erected setae; elytra glabrous in most species (except for Dongodytes elongatus sp. n.), anterior dorsal pore of 3rd elytral stria present (Fig. 6); ventrite VII in male with two pairs of paramedian setae (Fig. 25) (subgenus Dongodytes Deuve)    2
–		Antennae short, not extending over elytral apex (Figs 11–15), head less elongate, suddenly constricted posteriad before neck constriction which is short (Figs 20–24), posterior supraorbital setae always present, whole body pubescent, covered with dense, erected short setae, anterior dorsal pore of 3rd elytral stria absent (Fig. 7); ventrite VII in male with a pair of paramedian setae (Fig. 26) (subgenus Dongodytodes Tian)    8
2		Fore body extremely elongate especially on head, head (excluding mandibles) plus prothorax as long as elytra, propleura slightly expanded (Tian’e: cave Bahao Dong)    Dongodytes (s. str.) giraffa Uéno
–		Fore body less elongate, head (excluding mandibles) plus prothorax shorter than elytra, propleura strongly expanded    3
3		Posterior latero-marginal setae of pronotum absent    4
–		Posterior latero-marginal setae of pronotum present    5
4		Elytra pubescent, with three dorsal pores on 3rd stria (Du’an: Lalie: cave Lapo Dong I)    Dongodytes (s. str.) elongatus sp. n.
–		Elytra smooth and glabrous, with two dorsal pores on 3rd striae, the preapical one absent (Du’an: Longwan: cave Longhuan Dong)    Dongodytes (s. str.) lani sp. n.
5		Hind latero-marginal setae of pronotum distant from hind angles, pronotum glabrous, ventrites IV–VI each with two pairs of paramedian setae, median lobe of aedeagus distinctly curved at apex    6
–		Hind latero-marginal setae close to hind angles, pronotum covered by sparse and long setae, ventrites IV–VI each with only a pairs of paramedian setae, median lobe of aedeagus not curved at apex    7
6		Lateral borders of pronotum invisible from above in apical fifth, pronotum shorter (PL/PW=2.0) (Bama: cave Jiabao Dong)    Dongodytes (s. str.) fowleri Deuve
–		Lateral borders of pronotum visible from above in apical fifth, pronotum longer (PL/PW=2.1) (Fengshan: cave Yuanyang Dong)    Dongodytes (s. str.) grandis Uéno
7		Head and pronotum covered with sparser, long and erected setae, head broader, suddenly constricted before neck constriction (Fig. 16), hind angles of pronotum sharp, lateral sides of elytra near base nearly straight (Fig. 27) (Du’an: Chengjiang: cave Baxian Dong)    Dongodytes (s. str.) baxian Tian
		Head and pronotum covered with denser, long and erected setae, head elongate, gently and gradually narrowed before neck constriction (Fig. 19), hind angles of pronotum blunt, lateral sides of elytra near base slightly sinuate (Fig. 30) (Du’an: Longfu: cave Shuiyuan Dong)    Dongodytes (s. str.) troglodytes sp. n.
8		Body stout, pronotum with only a pair of latero-marginal setae close to hind angles    9
–		dle and a little before hind angles respectively    10
9		Head strongly expanded (Fig. 21), clypeus sexsetose, elytra elongate (Fig. 11) (Du’an: Gaoling: caves Jinzhu Dong I and Jinzhu Dong II)    Dongodytes (Dongodytodes) jinzhuensis sp. n.
–		Head elongate (Fig. 22), clypeus 10-setose, elytra more ovate (Fig. 12) (Gaoling: cave Nongguanshang Dong II)    Dongodytes (Dongodytodes) inexpectatus sp. n.
10		Head broader, sides nearly paralleled in median part (Fig. 20), lateral sides of pronotum almost straight or weakly sinuate before hind angles (Fig. 31) (Du’an: Xia’ao: cave Lubian Dong)    Dongodytes (Dongodytodes) deharvengi Tian
–		Head slender, sides not paralleled in median part, lateral sides of pronotum distinctly sinuate before hind angles    11
11		Small, propleura more expanded, elytra shorter, base of elytra broader (Figs 13–14), elytra with only preapical dorsal pore, median lobe of aedeagus stout and much shorter (Figs 43–44) (Du’an: Longwan: cave Nongqu Dong I; Chengjiang: caves Diaomao Dong and Nongzhong Dong I)    Dongodytes (Dongodytodes) brevipenis sp. n.
–		Large, propleura less expanded, elytra more elongate, base of elytra narrowed (Fig. 13), elytra with middle and apical dorsal pores, median lobe of aedeagus much slender (Figs 45–46) (Dahua: Qibainong: cave Qiaoxu Dong)    Dongodytes (Dongodytodes) yaophilus sp. n.

Taxon Treatment

• Tian, M; Yin, H; Huang, S; 2014: Du’an Karst of Guangxi: a kingdom of the cavernicolous genus Dongodytes Deuve (Coleoptera, Carabidae, Trechinae) ZooKeys, (454): 69-107. doi

Images

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.  Figure 73. Distribution of the genus Dongodytes. a Dongodytes (s. str.) giraffa Uéno b Dongodytes (s. str.) grandis Uéno c Dongodytes (s. str.) fowleri Deuve d Dongodytes (Dongodytodes) yaophilus sp. n. e Dongodytes (Dongodytodes) deharvengi Tian f Dongodytes (s. str.) troglodytes sp. n. g Dongodytes (Dongodytodes) jinzhuensis sp. n. h Dongodytes (Dongodytodes) inexpectatus sp. n. i Dongodytes (Dongodytodes) brevipenis sp. n. j Dongodytes (s. str.) baxian Tian k Dongodytes (s. str.) lani sp. n. l Dongodytes (s. str.) elongatus sp. n. Star: species of Dongodytes (s. str.); square: species of Dongodytodes.