Jacaena thakek ( Jäger, 2007 ), Dankittipakul & Tavano & Singtripop, 2013

Dankittipakul, Pakawin, Tavano, Maria & Singtripop, Tippawan, 2013, Revision of the spider genus Jacaena Thorell, 1897, with descriptions of four new species from Thailand (Araneae: Corinnidae), Journal of Natural History 47 (23 - 24), pp. 1539-1567 : 1553

publication ID	https://doi.org/10.1080/00222933.2012.763059
DOI	https://doi.org/10.5281/zenodo.6502524
persistent identifier	https://treatment.plazi.org/id/A676E712-FFCD-FF9A-06CC-FDF3119089B0
treatment provided by	Felipe (2021-08-13 18:30:33, last updated 2024-11-27 00:57:10)
scientific name	Jacaena thakek ( Jäger, 2007 )
status	comb. nov.

Treatment

Jacaena thakek ( Jäger, 2007) View in CoL comb. nov.

( Figures 1F View Figure 1 , 5G–I View Figure 5 , 10D–F View Figure 10 )

Sesieutes thakek Jäger, 2007: 48 View Cited Treatment , figs 73–82, description of ♂.

Type material

Holotype: ♂, Laos, Khammouan Province, 9.5 km northeast of Thakek, 159 m, 17 ◦ 26.936 ′ N, 104 ◦ 52.499 ′ E, sieving leaf litter in front of cave , 30 October 2004, P. Jäger and V. Vedel leg. ( SMF–56635 , examined, Figures 1F View Figure 1 , 5G–I View Figure 5 , 10D–F View Figure 10 ). GoogleMaps

Diagnosis

This species seems to be closest to J. mihun , because both species have very distinctly enlarged PME; their palps can be distinguished from other members of Jacaena by the pear-shaped bulb anteriorly narrowed, and the apex of the short, triangular conductor is pointing apically ( Figures 4G–I View Figure 4 cf. 5G–I). The male of this species can be separated from that of J. mihun by the absence of a small, triangular denticle on the dorsal surface of the conductor ( Figure 10A View Figure 10 cf. 10D). However, we have a private notion that the boundary between these two species is vague and J. thakek comb. nov. is possibly a junior synonym of J. mihun . Much larger samples would be needed to corroborate these slight differences as species-specific rather than intraspecific variation because more material recently obtained suggests that J. mihun has relatively broad distribution covering northern and north-eastern parts of Thailand (and most likely extending eastwards to Laos where J. thakek comb. nov. was collected).

Distribution

Known only from the type locality, Khammouan Province, Laos.

References

Jager P. 2007. Spiders from Laos with descriptions of new species (Arachnida: Araneae). Acta arachn Tokyo. 56: 29 - 58.

Figures

Figure 1. Males of Jacaena spp., habitus, dorsal (A–H). Jacaena schwendingeri comb. nov., holotype (A); J. lunulata sp. nov., holotype (B); J. punctata sp. nov., holotype (C); J. mihun (D); J. erawan comb. nov. (E); J. thakek comb. nov., holotype (F); J. schwendingeri comb. nov. (G); J. lunulata sp. nov., paratype (H). DS, dorsal scutum.

Figure 4. Jacaena spp. Male palps, ventral (A, D, G). Ditto, prolateral (B, E, H). Ditto, retrolateral (C, F, I). Jacaena schwendingeri comb. nov., holotype (A–C); J. lunulata sp. nov., paratype (originally misidentified as Sesieutes schwendingeri) (D–F); J. mihun, holotype (G–I).

Figure 5. Jacaena spp. Male palps, ventral (A, D, G). Ditto, prolateral (B, E, H). Ditto, retrolateral (C, F, I). Jacaena erawan comb. nov., holotype (A–C); J. punctata sp. nov., holotype (D–F); J. thakek comb. nov., holotype (G–I).

Figure 10. Jacaena mihun, holotype (A–C); J. thakek comb. nov., holotype (D–F). Male palp, ventral (A, D). Ditto, prolateral (B, E). Ditto, retrolateral (C, F).