taxonID	type	description	language	source
965B0F660F3FFA5BFEC564C4FEF3FC02.taxon	materials_examined	Material. Holotype: BRAZIL, Mato Grosso, Jaciara, Córrego Tenente Amaral, 1 male (CERMT # 1), 1. IX. 1999. Paratypes: same locality, 4 males, 1 female, 1. IX. 1999; 1 female, 14. IX. 1999; 5 males, 1 female, 3. XI. 1999; 2 males, 4 females, 20. XI. 1999; 2 males, 27. XI. 1999; 1 male, 1 female, I. 2000; 2 males, 1 female, 6. I. 2000; 1 male, 18. I. 2000; 2 females, 29. I. 2000; 1 male, 2 females, 16. III. 2000; 2 females, 24. III. 2000; 2 males, 13. V. 2000; 3 males, 2 females, 26. V. 2000; 1 female, 27. VII. 2000; 5 males, 1 female, 16. IX. 2000; 4 males, 1 female, 12. IX. 2000; 2 males, 5. I. 2001; 3 males, 1 female, 20. I. 2001; 2 males, 1 female, 17. III. 2001; 1 male, 25. III. 2001; 1 female, 25. V. 2001; 3 males, 2 females, 17. VII. 2001. Cáceres, 1 male, 44 females, 14. X. 2003.	en	Bispo, Pitágoras C., Neves, Cláudio O., Froehlich, Claudio G. (2005): Two new species of Perlidae (Plecoptera) from Mato Grosso State, western Brazil. Zootaxa 795: 1-6, DOI: 10.5281/zenodo.170543
965B0F660F3FFA5BFEC564C4FEF3FC02.taxon	description	Description. General color brownish to ochraceous. Frons of the general color but Mline and clypeal area lighter, sometimes not clearly delimited (Fig. 1); lappets brownish, genae and parietalia ochraceous to yellowish. Antennae brownish, maxillary palpi brownish, labial palpi yellowish. Pronotum ochraceous with darker sublateral stripes, rugosities lighter (Fig. 1). Wing membrane ochraceous, veins brownish to ochraceous, costal vein pale. Femora ochraceous, more yellowish in some specimens; tibiae and tarsi ochraceous. Cerci ochraceus. Male. Forewing length of specimens from Jaciara, 9.5 – 12 mm (n = 48, mean = 10.77 mm, s. d. = 0.62 mm); of specimen from Cáceres, 9.5 mm. Hammer conical, truncate apically (Fig. 2). Penial armature in dorsal / ventral view narrowing gradually to near the apex, then abruptly; ventral vesicles present near distal end. Dorsal keel absent. Hooks smoothly curved, apices pointed (Figs. 3 – 5). Female. Forewing length of females from Jaciara, 14 – 17 mm (n = 29, mean = 16.60 mm, s. d. = 0.967); females from Cáceres, 12.5 – 15 mm (n = 44, mean = 14.03 mm, s. d. = 0.742). Subgenital plate four­lobed, median lobes narrower than lateral ones. Sternum 9 with T­shaped field of hairs, sublateral ones stronger (Fig. 6). Egg oval, simple, 0.33 x 0.20 (Fig. 7).	en	Bispo, Pitágoras C., Neves, Cláudio O., Froehlich, Claudio G. (2005): Two new species of Perlidae (Plecoptera) from Mato Grosso State, western Brazil. Zootaxa 795: 1-6, DOI: 10.5281/zenodo.170543
965B0F660F3FFA5BFEC564C4FEF3FC02.taxon	discussion	Remarks. The penial armature is similar to that of A. stanjewetti Froehlich (2002) from Santa Catarina, Brazil, and the provinces of Entre Ríos and Misiones, Argentina, but does not show, in dorsal view, wedge shaped­keel and does not have a marked distal curvature. As regards color, in A. stanjewetti the frons is darker and has a more marked pattern, and the pronotum is brown to the margins. The egg of A. stanjewetti is elongate oval and has a small peg in the posterior pole, absent in the present species.	en	Bispo, Pitágoras C., Neves, Cláudio O., Froehlich, Claudio G. (2005): Two new species of Perlidae (Plecoptera) from Mato Grosso State, western Brazil. Zootaxa 795: 1-6, DOI: 10.5281/zenodo.170543
965B0F660F3FFA5BFEC564C4FEF3FC02.taxon	etymology	Etymology. Jaciara, the municipality where the holotype was collected. Noun in apposition.	en	Bispo, Pitágoras C., Neves, Cláudio O., Froehlich, Claudio G. (2005): Two new species of Perlidae (Plecoptera) from Mato Grosso State, western Brazil. Zootaxa 795: 1-6, DOI: 10.5281/zenodo.170543
965B0F660F3DFA5CFEC56327FEF4F8FA.taxon	materials_examined	Material. Holotype: BRAZIL, Mato Grosso, Jaciara, Córrego Tenente Amaral, 1 male (CERMT # 2), 27. XI. 1999. Paratypes: Same locality, 1 female, 1. IX. 1999; 2 females, 22. XI. 1999; 1 male, 1 female, 3. XI. 1999; 3 males, 1 female, 13. XI. 1999; 1 female, 27. XI. 1999; 1 female, 2. III. 2000.	en	Bispo, Pitágoras C., Neves, Cláudio O., Froehlich, Claudio G. (2005): Two new species of Perlidae (Plecoptera) from Mato Grosso State, western Brazil. Zootaxa 795: 1-6, DOI: 10.5281/zenodo.170543
965B0F660F3DFA5CFEC56327FEF4F8FA.taxon	description	Description. General color pale yellowish in alcohol, possibly greenish in life. Eyes with unpigmented mesal area (Fig. 8). Wings pale, in a few specimens darker area at anastomosis and CuA. Male. Forewing length, 13 – 14 mm. Hammer rounded, with horizontal orientation (Fig. 9). Tergum 10 with normal pilosity. Penial armature tubular, open ventrally to near apex, ending in a membranous and arched structure; apex membranous, globose; hooks absent; (Figs. 10 – 12). Paraprocts with large subapical denticle. Female. Forewing length, 13.5 – 16 mm. Subgenital plate elongate, covering part of sternum 10 and with a small distal emargination (Fig. 13). Egg oval, 0.37 x 0.22 mm (Fig. 14).	en	Bispo, Pitágoras C., Neves, Cláudio O., Froehlich, Claudio G. (2005): Two new species of Perlidae (Plecoptera) from Mato Grosso State, western Brazil. Zootaxa 795: 1-6, DOI: 10.5281/zenodo.170543
965B0F660F3DFA5CFEC56327FEF4F8FA.taxon	discussion	Remarks. This is the first named species for west­central Brazil and the first for the State of Mato Grosso. Some nymphs and a female adult, unnamed, were collected in the State of Goiás (Bispo et al. 2002). The present species is similar to M. pulchra Ribeiro­ Ferreira & Froehlich 1999, from Manaus, Amazonas state, but is larger, as the forewing length of males of M. pulchra varies from 10.5 to 12 mm (personal communication, J. M. F. Ribeiro). Besides, the penial armature of M. pulchra lacks the ventrally distal arched structure, and the distal membranous part narrows apically, forming a cone. The large subapical denticle of M. matogrossensis is similar to that ilustrated for M. pulchra (Froehlich, 2002).	en	Bispo, Pitágoras C., Neves, Cláudio O., Froehlich, Claudio G. (2005): Two new species of Perlidae (Plecoptera) from Mato Grosso State, western Brazil. Zootaxa 795: 1-6, DOI: 10.5281/zenodo.170543
965B0F660F3DFA5CFEC56327FEF4F8FA.taxon	etymology	Etymology. Belonging to Mato Grosso, Brazilian state where the species was collected.	en	Bispo, Pitágoras C., Neves, Cláudio O., Froehlich, Claudio G. (2005): Two new species of Perlidae (Plecoptera) from Mato Grosso State, western Brazil. Zootaxa 795: 1-6, DOI: 10.5281/zenodo.170543
