Matta, Crosby, 1934

Brescovit, Antonio D. & Cizauskas, Igor, 2019, Seven new species of the spider genus Matta Crosby from caves in the State of Minas Gerais, Brazil (Araneae, Tetrablemmidae), Zootaxa 4559 (3), pp. 401-444 : 403

publication ID	https://doi.org/10.11646/zootaxa.4559.3.1
publication LSID	lsid:zoobank.org:pub:10CDA291-A32F-4954-9B80-E33579AF46E3
DOI	https://doi.org/10.5281/zenodo.5934731
persistent identifier	https://treatment.plazi.org/id/038887C8-E768-FF8F-FF0D-D656FA1F1827
treatment provided by	Plazi (2019-04-03 20:01:38, last updated 2024-11-29 16:21:01)
scientific name	Matta
status

Treatment

Key to Brazilian species of Matta View in CoL

1. Eyes absent ( Fig. 20A View FIGURE 20 , 21C View FIGURE 21 )............................................................... M. humrrum View in CoL sp. n.

- Eyes present ( Fig. 1A View FIGURE 1 , 7A View FIGURE 7 ).............................................................................. 2

2. Normal eyes ( Fig. 1A, D View FIGURE 1 )............................................................................... 3

- Vestigial eyes (Fig. Fig. 7A, D View FIGURE 7 )........................................................................... 5

3. Carapace less elongated in the posterior region ( Fig. 2B View FIGURE 2 ).......................................... M. zuiuda View in CoL sp. n.

- Carapace most elongated in the posterior region ( Lehtinen, 1981, fig. 297)........................................ 4

4. Male: rugose ventral face of the palpal tibiae, long embolus; female with triangular DF ( Brescovit, 2005, figs 18-19, 21).......................................................................................... M. angelomachadoi View in CoL

- Male: smooth ventral face of the palpal tibiae, shorter embolus; female with conical DF ( Crosby, 1934, fig. 6; Lehtinen, 1981, fig. 310.................................................................................. M. hambletoni View in CoL

5. Separate vestigial eyes ( Fig. 7A View FIGURE 7 )......................................................................... 6

- Together vestigial eyes ( Fig. 23A, C View FIGURE 23 )...................................................................... 7

6. Male: retrolateral projection on leg I with four conspicuous setae in large sockets ( Fig. 7E View FIGURE 7 ̅F); female with oval dorsal fold of the uterus externus ( Fig. 6F View FIGURE 6 )............................................................... M. pititinha View in CoL sp. n.

- Male: retrolateral projection on leg I on a raised base, with four conspicuous setae in elevated sockets ( Fig 12A View FIGURE 12 ̅D); female with mushroom shape dorsal fold of the uterus externus ( Fig. 10F View FIGURE 10 )................................ M. humhum View in CoL sp. n.

7. Body slender and long legs in males and females ( Fig. 15A, D View FIGURE 15 )................................... M. cambito View in CoL sp. n.

- Body truncated and shorter legs in males and females ( Fig. 16A, D View FIGURE 16 ).............................................. 8

8. Male palp with laminar projection having enlarged base, forming a side flap ( Fig. 24C View FIGURE 24 ̅E); female with diamond piriform dor- sal fold of the uterus externus ( Fig. 22F View FIGURE 22 )...................................................... M. nuusga View in CoL sp. n.

- Male palp without laminar projection ( Fig. 28A View FIGURE 28 ̅H); female with sclerotized base of the dorsal fold of the uterus externus ( Fig. 26F View FIGURE 26 )..................................................................................... M. teteia View in CoL sp. n.

References

Brescovit, A. D. (2005) A new species of the spider genus Matta Crosby from Brazil (Araneae: Tetrablemmidae). Lundiana, 6, 49 ‾ 54.

Crosby, C. R. (1934) An interesting two-eyed spider from Brazil (Tetrablemmidae). Bulletin of the Brooklyn Entomological Society, 29, 19 ‾ 23.

Lehtinen, P. T. (1981) Spiders of the Oriental-Australian region. III. Tetrablemmidae, with a world revision. Acta Zoologica Fennica, 162, 1 ‾ 151.

Figures

FIGURE 1. Matta zuiuda sp. n., male IBSP 186407 (A–C), female IBSP 186407 (D–F) A habitus, dorsal view B left male palp, retrolateral view C same, prolateral view D habitus, dorsal view E abdomen, vulva, ventral view F same, dorsal view cleared (Abreviations: CD, copulatory duscts; CO, copulatory opening; CP, Central process; DF, sclerotized dorsal fold of the uterus externus; OUE, opening of the uterus externus; Pa, pre anal plate; Pog, postgenital plate; r, receptaculum) Scale bars: 0.5 mm (F).

FIGURE 2. Matta zuiuda sp. n., male IBSP 186465 (A–F), A carapace, frontal view B lateral view C ocular area, frontal view D chelicerae, apophysis, frontal view E chelicerae, apophysis, detail, frontal view F chelicerae, apophysis, lateral view.

FIGURE 6. Matta pititinha sp. n., male IBSP 196141 (A–C), female IBSP 196142 (D–F) A habitus, dorsal view B left male palp, retrolateral view C same, prolateral view D habitus, dorsal view E abdomen, vulva, ventral view F same, dorsal view cleared. Scale bars: 0.5 mm (F).

FIGURE 7. Matta pititinha sp. n., male IBSP 196145 (A–F), A carapace, frontal view B chelicerae, details, frontal view C same, lateral view D carapace, lateral view E leg I, retrolateral view F same, prolateral view.

FIGURE 10. Matta humhum sp. n., male IBSP 186427 (A–C), female IBSP 186427 (D‒F) A habitus, dorsal view B palp, retrolateral view C same, prolateral view D habitus, dorsal view E abdomen, ventral view F vulva, cleared, dorsal view.

FIGURE 12. Matta humhum sp. n., male IBSP 196173 (A–C) A‒B leg I, tibiae+metatarsus, retrolateral view C tibiae I, dorsal view D leg I, tibiae+metatarsus, ventral view E tibiae I, tricobothrium, dorsal view F male palp, tibiae, prolateral view.

FIGURE 15. Matta cambito sp. n., male IBSP 196166 (A–C), female IBSP 196166 (D‒F) A habitus, dorsal view B palp, retrolateral view C same, prolateral view D habitus, dorsal view E abdomen, ventral view F vulva, cleared, dorsal view.

FIGURE 16. Matta cambito sp. n., male IBSP 196166 A carapace, frontal view B chelicerae, frontal view C carapace, lateral view D same, detail chelicerae, lateral view E same, dorsal view F same, ocular area, detail, frontal view G abdomen, ventral view H same, epiandrous area, ventral view.

FIGURE 20. Matta humrrum sp. n., male IBSP 182519 A carapace, frontal view B chelicerae, frontal view C carapace, lateral view D chelicerae, detail, lateral view E leg I, prolateral view F same, prolateral view G chelicerae, projection, detail, dorsal view H male palp, frontal view.

FIGURE 21. Matta humrrum sp. n., (A‒B) male IBSP 182519 (C̅H) female IBSP 180288 A palp, prolateral view B same retrolateral view C carapace, frontal view D chelicerae, detail, frontal view E carapace, lateral view F abdomen, lateral view G same, ventral view H same, vulva plate, ventral view.

FIGURE 22. Matta nuusga sp. n., male IBSP 186385 (A–C), female IBSP 186385 (D‒F) A habitus, dorsal view B palp, prolateral view C same, retrolateral view D habitus, dorsal view E abdomen, ventral view F vulva, cleared, dorsal view.

FIGURE 23. Matta nuusga sp. n., male IBSP 186512 A carapace, frontal view B chelicerae, frontal view C carapace, ocular area, dorsal view D chelicerae, detail, lateral view E leg I, prolateral view F same, retrolateral view.

FIGURE 24. Matta nuusga sp. n., male palp IBSP 186520 A prolateral view B detail, prolateral view C retrolateral view D detail, retrolateral view E frontal view F palp tibiae, prolateral view (Abbreviations: F, flap).

FIGURE 26. Matta teteia sp. n., male IBSP 183764 (A–C), female IBSP 183764 (D‒F) A habitus, dorsal view B palp, prolateral view C same, retrolateral view D habitus, dorsal view E abdomen, ventral view F vulva, cleared, dorsal view.

FIGURE 28. Matta teteia sp. n., male palp IBSP 196165 A prolateral view B detail, prolateral view C retrolateral view D detail, retrolateral view E frontal-lateral view F frontal view G distal area, prolateral H distal area, retrolateral (Abbreviations: C, conductor; E, embolus; Pe, projection of embolus).