Liphistius linang, Peter J. Schwendinger, 2017

Peter J. Schwendinger, 2017, A revision of the trapdoor spider genus Liphistius (Mesothelae: Liphistiidae) in peninsular Malaysia; part 1, Revue suisse de Zoologie 124 (2), pp. 391-445 : 417-418

publication ID	https://doi.org/ 10.5281/zenodo.893555
DOI	https://doi.org/10.5281/zenodo.6042370
persistent identifier	https://treatment.plazi.org/id/4C30A452-FFFE-FFEC-BE64-F8873A70F8D1
treatment provided by	Plazi
scientific name	Liphistius linang
status

Treatment

The linang View in CoL -group

Diagnosis: Small to medium-sized spiders (carapace length of males 4.50-6.83, carapace width 3.98-6.21) with a colour pattern on carapace, limbs and opisthosomal tergites ( Fig. 2B View Fig. 2 ). Distinguished from the malayanus - Key to the species of the linang -group:

1 Males without scopula on tarsus IV; long bristle retroventrally at base of tibial apophysis thin ( Fig. 15A View Fig. 15 , G-I); paracymbium quite long ( Fig. 15A View Fig. 15 ); distal edge of contrategulum with wide gap behind distinctly bent dorsal apex ( Fig. 15B View Fig. 15 ). Poreplate with anterior margin distinctly invaginated ( Fig. 16 View Fig. 16 A-E); CDO a transverse slit or triangle without enlarged pores lateral to it ( Fig. 16A View Fig. 16 , C-D); receptacular cluster indistinctly divided into lateral halves, its vesicles quite short ( Fig. 16B, E View Fig. 16 ) ............................................................................ L. linang sp. nov. (in Malaysia)

- Males with scopula on tarsus IV; long bristle retroventrally at base of tibial apophysis thick, spine-like ( Fig. 17A View Fig. 17 , I-K); paracymbium short ( Fig. 17A View Fig. 17 ); distal edge of contrategulum without gap behind only slightly or not bent dorsal apex ( Fig. 17B View Fig. 17 , G-H). Poreplate with anterior margin only indistinctly invaginated ( Fig. 18 View Fig. 18 ); CDO a longitudinal slit or semicircular hole with an enlarged pore on each lateral side ( Fig. 18A, C, E, G View Fig. 18 ); receptacular cluster not divided into lateral halves, its vesicles quite long ( Fig. 18B, D, F, H View Fig. 18 ) .... L. indra sp. nov. (in Thailand)

group and the tioman -group by males possessing a large para-embolic plate with a coarsely serrate distal margin ( Figs 15 View Fig. 15 A-D, 17A-D), a narrow and pointed dorsal apex of the contrategulum ( Figs 15 View Fig. 15 E-F, 17G-H), and a retrolateral tibial apophysis deeply divided into a long, deep retroventral part and a very short, small retrodorsal part ( Figs 15 View Fig. 15 G-I, 17I-K) (tibial apophysis also deeply divided in L. tioman but in that species both parts equally long; Fig. 11A View Fig. 11 , G-I); three megaspines on retroventral part short and bent, single megaspine on retrodorsal part short, curved and weaker than other megaspines ( Figs 15A View Fig. 15 , G-I; 17A, I-K). Females distinguished by a peculiar vulval plate with an only partially sclerotised poreplate widely separated from small remnant of posterior stalk situated at posterior margin of vulva ( Figs 16 View Fig. 16 A-E, 18); CDO small, in many cases slit-like ( Figs 16A View Fig. 16 , C-D; 18A, C, E, G).

Species included: Liphistius linang sp. nov., L. indra sp. nov.

Relationships: The linang -group is morphologically intermediate between the tioman -group and the batuensis -group. Sharing with L. tioman a deeply divided tibial apophysis with the retrodorsal-apical megaspine distinctly separated from the other three megaspines, and sharing with this and other species in the tioman -group a distinctly elevated para-embolic plate. Females of the linang -group show strong resemblance with those of the batuensis -group by possessing an only partially sclerotised poreplate. However, females of L. linang sp. nov. have a divided receptacular cluster, as do females of all tioman -group species. The relationships of the linang-group are therefore not clear.

Distribution: Northeastern peninsular Malaysia and southern Thailand ( Fig. 1 View Fig. 1 , localities 13-14).