Matidia Thorell, 1878

Zhang, Jianshuang, Yu, Hao & Li, Shuqiang, 2021, On the clubionid spiders (Araneae, Clubionidae) from Xishuangbanna, China, with descriptions of two new genera and seven new species, ZooKeys 1062, pp. 73-122 : 73

Genus Matidia Thorell, 1878

Matidia Thorell, 1878: 182.

Kakaibanoides Barrion & Litsinger, 1995: 149 (type K. paranga Barrion & Litsinger, 1995, considered as junior synonym of Matidia by Deeleman-Reinhold, 2001: 156).

Type species.

Matidia virens Thorell, 1878 from Moluccas, Sulawesi.

Diagnosis.

Species in this genus differ from all other clubionids by the following: the pars cephalica is 2 × narrower than the pars thoracica (Figs 4E, G , 6E-G ) (vs. wider), leg I is longest (vs. not longest), and there is a dark ventral abdominal spot in males (Fig. 4F ) (vs. absent). Matidia resembles Malamatidia , Nusatidia , and Ramosatidia gen. nov. by the slender, greenish body but is consistently separable by the shape of the copulatory organs: the male palp has a ribbon-shaped embolus (Figs 3A, C-F , 5A, C-F ) (vs. embolus not ribbon-shaped), the epigyne has one or two depressions (or an atrium) and no septum (Figs 4A, B , 6A, B ) (vs. depression lacking in Nusatidia and Ramosatidia gen. nov., or present but with a septum in Malamatidia ).

Comments.

Based on the two newly discovered species, the description should be extended from Deeleman-Reinhold (2001): the epigyne of M. spatulata Chen & Huang, 2006 with 2 depressions, copulatory ducts relatively long (longer than epigyne) (Fig. 4A-D ) (vs. one central atrium and short ducts (shorter than epigyne) in all other congeners (e.g., M. xieqian sp. nov.; Fig. 6A-D )); an additional exceptional feature in M. xieqian sp. nov. is that the cheliceral promarginal teeth are farther from the fang base than the retromarginal ones (vs. promarginal teeth nearer the fang base in all other known Matidia species). Both M. spatulata and M. xieqian sp. nov. have anteriorly located bursae (vs. bursae located laterally or posteriorly).

Note.

Deeleman-Reinhold (2001) considered Matidia putatively polyphyletic. In the same work, she established three new, similar closely related genera ( Nusatidia , Pristidia , and Malamatidia ) to accommodate 12 new species from SE Asia, and placed them in the subfamily Clubioninae . She also transferred four Matidia species to Nusatidia . The similar somatic characters and sympatric distribution strongly suggest close relationships between the four genera. However, the phylogenetic relationships remain unresolved ( Versteirt et al. 2010).

Figures

Figure 3. Male palp of Matidia spatulata A prolateral view B retrolateral view C bulb, prolateral view D bulb, ventral view E bulb, ventrolateral view F bulb, retrolateral view. Abbreviations: C = conductor; E = embolus; EB = embolic base; PTA = prolateral tibial apophysis; RTA = retrolateral tibial apophysis; TA = tegular apophysis. Scale bars: 0.10 mm (equal for A, B, equal for C-F).

Figure 4. Matidia spatulata, epigyne (A-D), male habitus (E, F) and female habitus (G, H) A intact, ventral view B cleared, ventral view C cleared, dorsal view D cleared, dorsal view; path of copulatory duct marked E dorsal view F lateral view G dorsal view H ventral view. Arrow (F) point at dark ventral abdominal spot in male. Abbreviations: BS = bursa; CD = copulatory duct (dashed line showing schematic course of copulatory duct, dorsal); CO = copulatory opening; FD = fertilization duct; SP = spermatheca. Scale bars: 0.10 mm (equal for A-D); 2 mm (equal for E, F, equal for G, H).

Figure 5. Male palp of the holotype of Matidia xieqian sp. nov., left palp and bulb (A, B, E, F) and flipped right bulb (C, D) A prolateral view B retrolateral view C bulb, prolateral view D bulb, ventral view E bulb, ventrolateral view F retrolateral view. Arrows (E) point at three processes of tegular apophysis. Abbreviations: C = conductor; E = embolus; PTA = prolateral tibial apophysis; RTA = retrolateral tibial apophysis; TA = tegular apophysis. Scale bars: 0.20 mm (equal for A, B, equal for C-F).

Figure 6. Matidia xieqian sp. nov., female paratype and male holotype, epigyne (A-D), male habitus (E, F) and female habitus (G, H) A intact, ventral view B cleared, ventral view C cleared, dorsal view D cleared, dorsal view; path of copulatory duct marked E dorsal view F lateral view G dorsal view H ventral view. Abbreviations: A = epigynal atrium; BS = bursa; CD = copulatory duct (dashed line showing schematic course of copulatory duct, dorsal); CO = copulatory opening; FD = fertilization duct; SP = spermatheca. Scale bars: 0.20 mm (equal for A-D); 1 mm (equal for E, F, equal for G, H).