taxonID	type	description	language	source
78178788FFC4FF9AFF725BE3F53AFD0D.taxon	materials_examined	Type material: Holotype male (MCZ 65865), GUYANA: Potaro-Siparuni Region, 03 - IX- 2014 (M. G. Branstetter). Material examined: BRAZIL, Amazonas: Manaus, Fazenda Experimental da UFAM, Masteria manauara Bertani, Cruz & Oliveira 2013, holotype male, (INPA 8598); 1 ♀ paratype (INPA 8600); 1 ♂ paratype (INPA 8606), Wanessa Cruz leg. Brazil, Amazonas: Manaus, Reserva Ducke, M. manauara, 1 ♂, 20. x. 2006 (INPA-AR 6291); 1 ♂, 20. x. 2006 (INPA- AR 6292); 1 ♂, 20. x. 2006 (INPA-AR 6293); 1 ♂, 20. x. 2006 (INPA-AR 6294), J. L. Souza leg.; 1 ♂, 10. iii. 2017 (INPA-AR 6295); 1 ♂, 28. iv. 2017 (INPA-AR 6296); 1 ♂, 05. viii. 2017 (INPA-AR 6297); 1 ♂, 4 ♀, 04. i. 2018 (INPA-AR 6298), all collected in pitfall, M. Q. Almeida leg.	en	Almeida, Marlus Queiroz, Salvatierra, Lidianne, Morais, José Wellington De (2018): A new species of Masteria L. Koch, 1873 (Dipluridae: Masteriinae) from Guyana. Zootaxa 4434 (2): 366-368, DOI: 10.11646/zootaxa.4434.2.6
78178788FFC4FF9AFF725BE3F53AFD0D.taxon	etymology	Etymology. The specific name refers to its occurrence in Guyana.	en	Almeida, Marlus Queiroz, Salvatierra, Lidianne, Morais, José Wellington De (2018): A new species of Masteria L. Koch, 1873 (Dipluridae: Masteriinae) from Guyana. Zootaxa 4434 (2): 366-368, DOI: 10.11646/zootaxa.4434.2.6
78178788FFC4FF9AFF725BE3F53AFD0D.taxon	diagnosis	Diagnosis. Masteria guyanensis new species is similar to Masteria manauara by having six eyes (Figs. 1 ─ 3), paraembolic apophysis absent (Figs. 4 ─ 6), and two subdistal ventral spurs curved inwards (Figs. 1 ─ 7), but differ by having a shorter embolus (Figs. 4 ─ 6), lacking spurs on metatarsus I, palp with 4 apical spines on cymbium, longer palp femur and sternum (Figures 2, 4, 6).	en	Almeida, Marlus Queiroz, Salvatierra, Lidianne, Morais, José Wellington De (2018): A new species of Masteria L. Koch, 1873 (Dipluridae: Masteriinae) from Guyana. Zootaxa 4434 (2): 366-368, DOI: 10.11646/zootaxa.4434.2.6
78178788FFC4FF9AFF725BE3F53AFD0D.taxon	description	Description. Male Holotype (MCZ 65865). Carapace 1.1 long, 1.0 wide, entirely pale yellow with darker lateral margins (Fig. 1); with long bristles. Fovea short, procurved. Six eyes on a tubercle (Fig. 3). Eye group 0.19 long, 0.20 wide. Size and interdistances: ALE 0.10, PME 0.05, PLE 0.09, ALE-ALE 0.03, ALE-PLE 0.006, PME-PLE 0.02 PME- PME 0.02, ALE-PME 0.009. MOQ front width 0.08, back width 0.18, length 0.09. Chelicerae small, 0.23 long, 0.18 wide, with 10 promarginal teeth. Labium 0.21 long, 0.13 wide. Maxillae 0.32 long, 0.25 wide, cuspules absent. Sternum 0.80 long, 0.58 wide, sigilla not evident. Bulb globose. Tegulum 0.18 long, 0.11 wide. Embolus short, 0.06 long, 0.006 wide. Leg formula 4132. Leg lengths and midwidths in Table 1. Tibia I with two subdistal prolateral spurs. Spines elongated: leg I, femur v 3, d 2; leg II, femur v 3, d 3, p 2; patella, v 2, d 1, r, tibia v 1, d 4, metatarsus v 3, d 1; leg III, femur v 4, d 5, patella d 2, tibia v 2, d 1, metatarsus v 1, d 1, p 1; leg IV, femur v 3, d 2, patella v 1, d 2, tibia v 3, d 3, metatarsus v 3; palp, tarsus 4. Abdomen 1.01 long, 0.68 wide. Spinnerets (Fig. 2): PMS not evident. PLS 0.56 long, 0.05 wide, basal, middle and apical segments, 0.37 long, 0.06 wide, 0.32 long, 0.09 wide, respectively. Female. Unknown.	en	Almeida, Marlus Queiroz, Salvatierra, Lidianne, Morais, José Wellington De (2018): A new species of Masteria L. Koch, 1873 (Dipluridae: Masteriinae) from Guyana. Zootaxa 4434 (2): 366-368, DOI: 10.11646/zootaxa.4434.2.6
78178788FFC4FF9AFF725BE3F53AFD0D.taxon	distribution	Distribution. Known only from the type locality (Potaro-Siparuni Region, Guyana).	en	Almeida, Marlus Queiroz, Salvatierra, Lidianne, Morais, José Wellington De (2018): A new species of Masteria L. Koch, 1873 (Dipluridae: Masteriinae) from Guyana. Zootaxa 4434 (2): 366-368, DOI: 10.11646/zootaxa.4434.2.6
