Pachygnatha Sundevall, 1823

Huang, Zongguang, Wu, Yecheng, Yin, Haiqiang, Xu, Xiang & Chen, Junhao, 2024, Two new species of the long-jawed orb-weaving spider genus Pachygnatha Sundevall, 1823 (Araneae, Tetragnathidae) from southern China, Zootaxa 5555 (3), pp. 385-406 : 387

Genus Pachygnatha Sundevall, 1823

Pachygnatha Sundevall, 1823: 16

Diagnosis: Males of Pachygnatha resemble those of Glenognatha by the presence of a retrolateral apophysis on the conductor ( Figs 13B, D , 14 ; Cabra-García & Brescovit 2016, fig. 74G), but can be distinguished from the latter by the paracymbium with a middle apophysis and pointing to the same direction as the cymbium ( Figs 2B , 8B ), versus the paracymbium without a middle apophysis but with a more or less expanded distal portion and pointing to the opposite direction in relation to the cymbium in Glenognatha ( Cabra-García & Brescovit 2016, figs 11H, 16H). Pachygnatha can also be distinguished from Glenognatha in both male and female by the position of tracheal spiracle, distinctly nearer to the colulus in Pachygnatha ( Fig. 7B ) than in Glenognatha ( Cabra-García & Brescovit 2016, fig. 14G).

Type species: Pachygnatha clercki Sundevall, 1823 from Norway .

Figures

FIGURE 2. Pachygnatha shengtangensis sp. nov., male, holotype. A–C, pedipalp: A, ventral; B, retrolateral; C, dorsal view. D–F, chelicera: D, prolateral; E, ventral; F, retrolateral.Abbreviations: C, conductor; Cy, cymbium; E, embolus; EMg, embolus medial groove; NS, nuptial spur; Pc, paracymbium; T, tegulum. Scale bars: 0.2 mm.

FIGURE 7. Habitus of Pachygnatha unciniformis sp. nov., male, holotype. A, dorsal; B, ventral; C, lateral. Scale bars: 0.5 mm.

FIGURE 8. Pachygnatha unciniformis sp. nov., male, holotype. A–C, pedipalp: A, ventral; B, retrolateral; C, dorsal. D–F, chelicera: D, prolateral; E, ventral; F, retrolateral. Abbreviations: C, conductor; Cy, cymbium; E, embolus; EMg, embolus medial groove; NS, nuptial spur; OC, outer cusp of fang; Pc, paracymbium; T, tegulum. Scale bars: 0.5 mm.

FIGURE 13. Top view of male pedipalp.A, B, Pachygnatha shengtangensis sp. nov., paratype:A, normal pedipalp; B. pedipalp with its cymbium removed. C, D, Pachygnatha unciniformis sp. nov., paratype: C, normal pedipalp; B. pedipalp with its cymbium removed. Abbreviations: C, conductor; CRa, conductor retrolateral apophysis; E, embolus; EMg, embolus medial groove; T, tegulum. Scale bars: 0.1 mm.

FIGURE 14. Dorsal view of male pedipalp (with the cymbium removed).A, Pachygnatha shengtangensis sp. nov., holotype; B. Pachygnatha unciniformis sp. nov., holotype. Abbreviations: C, conductor; CRa, conductor retrolateral apophysis; E, embolus; EMg, embolus medial groove; T, tegulum. Scale bars: 0.1 mm.