Seven new species of the spider genus Matta Crosby from caves in the State of Minas Gerais, Brazil (Araneae, Tetrablemmidae) Brescovit, Antonio D. Cizauskas, Igor Zootaxa 2019 2019-02-21 4559 3 401 444 3YF6W Brescovit & Cizauskas, 2019 Brescovit & Cizauskas 2019 [151,319,943,969] Arachnida Tetrablemmidae Matta GBIF Animalia Araneae 30 431 Arthropoda species nuusga sp. nov.   Figures 22̄25, 30C.  Types.Male holotypeand female paratypefrom Pains, Minas Gerais, Brazil, R. Zampaulo col., deposited in IBSP 186406.   Other material examined.  BRAZIL.  Minas Gerais: Matozinhos, CaveMOC-N5,  01-08/VIII/2011, F.P. Franco& C.A.R. Souza et al. col., 1♀( IBSP 180289);  Pains, Caveno name, 2013, A.P. Bueno et al. col., 1♀( IBSP 196135);  Caveno name, no date, R. Zampaulocol., 1♀( IBSP 186402);  Caveno name 2013, A. P. Bueno et al. col., 1♂ 1♀( IBSP 196129);  Cave(no data), R. Zampaulocol., 2♂( IBSP 186401);  CaveAMG-025 ( 20°22'29''S; 45°37'7''W)  17-29/ VI/2013, A. P. Bueno et al. col., 1♀( IBSP 186536);  CaveAMG-05 ( 20°22'4''S; 45°37'0''W),  14/I-02/II/2013, A.P. Bueno et al. col., 2♂( IBSP 186537);  CaveC6a,  4/XI/2005, M.E. Bichuettecol., 1♀( IBSP 196168);  CaveGE_32 ( 20°21'42''S; 45°36'26''W)  18/III-6/IV/2013, A.P. Bueno et al. col., 1♂( IBSP 196130);  CaveGE_34 ( 20°22'6''S; 45°36'14''W),  15-27/VII/2013, A.P. Bueno et al. col., 2♀( IBSP 196136);  Cave Gruta13,  IV/2008, E. O. Machado& J.P.P. Barbosacol., 1♀( IBSP 186392);  Cave Gruta Arcaica( 20°17'11''S; 45°47'34''W),  25/I/2008, E. O. Machado& J.P.P. Barbosacol., 1♂( IBSP 196169);  Cave Gruta do Angico( 20°25'4''S; 45°40'42''W),  25/ VI/2009, R.A. Zampaulocol., 1♀( IBSP 196125);  Cave Gruta do Carlinhos( 20°24'7''S; 45°40'22''W)  30/III/2013, M.P.A. Oliveiracol., 1♀( IBSP 181830);  Cave GrutaG-26 ( 20°22'48''S; 45°37'16''W),  04/ VI/2011, 1♀( IBSP 186012);  Cave Gruta Trincheira do Vietnã( 20°17'9''S; 45°47'35''W),  25/I/2008, E. O. Machado& J.P.P. Barbosacol., 1♂( IBSP 196170);  Cave ICPA_170, 2013, A.P. Bueno et al. col., 1♀( IBSP 196128);  Cave ICPA_777 ( 20°21'59''S; 45°36'27''W),  18/III-6/IV/2013, 1♂( IBSP 196132);  Cave ICPA_794 ( 20°21'36''S; 45°36'37''W) 18/III-6/  IV/20 13, 1♂( IBSP 196133);  Cave ICPA_811 ( 20°21'40''S; 45°36'41''W)  18/ III-06/IV/2013, 1♀( IBSP 196137);  Cave ICPA_834, 2013, 1♂ 1♀( IBSP 196138);  Cave ICPA_837 ( 20°22'46''S; 45°35'59''W)  01-06/IV/2013, 1♀( IBSP 196134);  Cave ICPA_838 ( 20°22'46''S; 45°35'59''W)  01-06/IV/2013, 2♂ 2♀( IBSP 196127);  Cave ICPA_841, 2013 1♂( IBSP 196126);  Cave ICPA_841 ( 20°22'49''S; 45°35'60''W)  01-06/ IV/2013, 1♀( IBSP 196131);  CaveICPA-148 ( 20°22'22''S; 45°36'31''W) 18/II-  09/III/20 13, 1♀( IBSP 186511; SEM);  CaveICPA-152 ( 20°22'18''S; 45°36'52''W)  29/VII-10/VIII/2013, 1♂ 1♀( IBSP 186539);  CaveICPA-588 ( 20°22'7''S; 45°36'60''W)  14/I-02/II/2013, 1♀( IBSP 186534);  1♀( IBSP 186538);  CaveICPA-620 ( 20°22'41''S; 45°36'28''W)  29/I-08/II/2013, 1♂( IBSP 186520; SEM);  CaveICPA-675 ( 20°22'28''S; 45°36'30''W)  18/II-09/III/ 2013, 1♂( IBSP 186512; SEM);  CaveICPA-692 ( 20°22'9''S; 45°36'15''W)  18/II-09/III/2013, 1♂( IBSP 186513), all collected by A. P. Bueno  et al. col., Cave IM_002 ( 20°18'8''S; 45°47'40''W),  15/V/2013, M.T.M. Souzacol., 1♂ (IBSP 186390); Cave IM_011 ( 20°18'10''S; 45°47'33''W),   06/XI/2013, M. Barcelos et al., 1♀( IBSP 184306); Cave IM_025 ( 20°18'6''S; 45°47'26''W),   23/IV/2013, M.T.M. Souzacol., 1♀( IBSP 186391); Cave SM_163 ( 20°22'26''S; 45°35'13''W),   13/II/2014, Equipe Spelayoncol., 1♀( IBSP 186389); Cave SM_216 ( 20°21'45''S; 45°35'36''W),   12/II/2014, Equipe Spelayoncol., 1♂( IBSP 186386); Cave SM_246 ( 20°21'51''S; 45°35'46''W),   20/ II/2014, Equipe Spelayoncol., 1♂( IBSP 186387); Cave SM_257 ( 20°21'52''S; 45°35'44''W),   20/II/2014, Equipe Spelayoncol., 1♂ 1♀( IBSP 186385; photo); Cave SM_261 ( 20°22'21''S; 45°35'14''W),   20/II/2014, Equipe Spelayoncol., 1♂( IBSP 186384); Cave SM_290 ( 20°22'2''S; 45°35'20''W),   20/II/2014, Equipe Spelayoncol., 1♂( IBSP 186383); Cave SPA_012/013 ( 20°17'58''S; 45°37'4''W),   27/VIII/20 13, F. O. Borgescol., 1♀( IBSP 186375); MIC_091 ( 20°25'59''S; 45°37'10''W) 9-15/VI /2015, Equipe Spelayon et alcol., 1♀( IBSP 196164); Piunhi, Cave ICCA-571 ( 20°20'45''S; 45°50'52''W),   13-21/I/2014, A.P. Bueno et al. col., 1♀( IBSP 186416); Santa Bárbara, Cave GAND_0033 ( 20°05'23''S; 43°39'9''W), 10/II-   20/III/20 14, Equipe Carstecol., 1♀( IBSP 186508)  1♂ 1♀( IBSP 186509)  2♀( IBSP 186510).   Etymology.The specific name is a noun in apposition that refers to an expression used by people in the Brazilian State of Minas Geraismeaning “astonishment”, due to the unusual grouped eye arrangement and internal morphology of the female genitalia.   Diagnosis.  Matta nuusgais distinguished from other  Mattaspecies by having a combination of anterior medial eyes together on a common base ( Fig. 23A, C) in both sexes, the laminar projection, with enlarged base forming a side flap ( Figs 22C, 24C̄E) in the male palp and diamond piriform dorsal fold of the uterus externus in females ( Fig. 22F).   Description. Male( holotype, IBSP 186406). Carapace, chelicerae, labium, endites, sternum and abdomen orange. Legs yellowish white ( Fig. 22A). Total length 1.25. Carapace projected, 0.53 long, 0.42 wide, with rugose surface laterally, dorsally almost smooth ( Fig. 23A). Sternal surface tenuously reticulate. Clypeus long, oblique, seven times the length of ocular area ( Fig. 23A). Eye diameters and interdistances: AME vestigial, contiguous ( Fig. 23A, C). Cheliceral apophysis robust, large and occupying almost the frontal area, with great number of long hairs and translucent median lamina ( Fig. 23A, C). Leg measurements: I—femur 0.36/ patella 0.13/ tibia 0.31/ metatarsus 0.2/ tarsus 0.23/ total 1.23; II—0.37/ 0.15/ 0.26/ 0.22/ 0.21/ 1.21; III—0.33/ 0.11/ 0.23/ 0.21/ 0.18/ 1.06; IV—0.41/ 0.13/ 0.36/ 0.25/ 0.28/ 1.43. Leg formula 4123. Leg spination: absent, metatarsus narrowed at base ( Fig. 23ĒF), leg I with a strong spine on an elevated base ( Fig. 23ĒF). Abdomenovoid, large sclerotized plate covering dorsal surface ( Fig. 22A); ventrally covered by four sclerotized plates. Abdominal plates:large pulmonary plate with rounded anterior margin, surrounding pedicel and bearing oval book-lung plates, followed posteriorly by half-moon postgenital plate, rectangular preanal plate, and conical anal plate surrounding spinnerets, laterally with four pairs of narrow plates, most ventral pair very short than others, and a line of the four epiandrous spigots. Male palpwith femur projected medially, with three long setae and small number of projected, salient and globose thin plates ( Fig. 24F); tibia strongly swollen, oval, rounded posteriorly; cymbium small; bulbus pearshaped, with short and poor elevated conductor, involving partially the base of the embolus long, flattened, lightly sinuous, and very enlarged at apex, with short and acute basal laminar projection, with enlarged base forming a side flap ( Figs 22B̄C, 24ĀE).  Female( Paratype, IBSP 186406). Coloration pattern as in male ( Fig. 22D). Total length 1.23. Carapace as in male, 0.52 long, 0.4 wide. Clypeus and sternum as in male. Eyes as in male. Chelicerae with reduced apophysis, shorter than male, with ventral translucent hyaline keel ( Fig. 25B). Leg measurements: I—femur 0.42/ patella 0.13/ tibia 0.31/ metatarsus 0.21/ tarsus 0.25/ total 1.32; II—0.37/ 0.12/ 0.25/ 0.17/ 0.23/ 1.14; III—0.29/ 0.12/ 0.21/ 0.18/ 0.21/ 1.01; IV—0.43/ 0.14/ 0.39/ 0.28/ 0.23/ 1.47. Leg formula 4123. Leg spination as in male. Pedipalpal tarsus ending in acuminate, smooth pit.  Abdomenwith plates as in male ( Fig. 25D̄E). Vulvae externally with large V-shaped receptacle, visible by transparency ( Fig. 22E); Ʌ-shaped post genital plate and enlarged copulatory opening ( Fig. 25F). Internally with enlarged receptaculum and narrow basal area of the copulatory ducts; central process 8-shaped, with one third of the length of the receptaculum ( Fig. 22F).  Natural history. All specimens of  Matta nuusga  sp. n.were collected in limestone caves in the karst region of Arcos-Pains and surroundings. Individuals were located on the cave floor below rocks in aphotic zones of the caves. Based in the eye modification and long hairs of trichobothria we hypothesize that this species is a troglobite.   Distribution.Known from caves in the State of Minas Gerais, Brazil( Fig. 30C). 2234226703 2011-08-01 2011-08-08 2011-08-01 IBSP F. P. Franco & C. A. R. Souza Brazil Cave Matozinhos 30 431 IBSP 180289 1 1 Minas Gerais 2234226591 IBSP A. P. Bueno Brazil Cave Pains 30 431 IBSP 196135 1 1 Minas Gerais 2234226511 [261,973,1194,1219] IBSP R. Zampaulo Brazil Cave 30 431 IBSP 186402 1 1 Minas Gerais 2234226745 IBSP A. P. Bueno Brazil Cave 30 431 IBSP 196129 2 1 1 Minas Gerais 2234226526 [473,1088,1230,1255] IBSP R. Zampaulo Brazil Cave 30 431 IBSP 186401 2 2 Minas Gerais 2234226621 2013-06-17 2013-06-29 2013-06-17 VI A. P. Bueno Brazil -20.374722 Cave 21 -45.61861 30 431 IBSP 186536 1 1 Minas Gerais 2234226727 2013-01-14 2013-02-02 2013-01-14 IBSP A. P. Bueno Brazil -20.367779 Cave 21 -45.616665 30 431 IBSP 186537 2 2 Minas Gerais 2234226589 2005-11-04 IBSP M. E. Bichuette Brazil Cave 30 431 IBSP 196168 1 1 Minas Gerais 2234226596 [263,1432,1338,1363] 2013-03-18 2013-04-06 2013-03-18 IBSP A. P. Bueno Brazil -20.361668 Cave 21 -45.60722 30 431 IBSP 196130 1 1 Minas Gerais 2234226566 [151,1254,1374,1399] 2013-07-15 2013-07-27 2013-07-15 IBSP A. P. Bueno Brazil -20.368334 Cave 21 -45.603886 30 431 IBSP 196136 2 2 Minas Gerais 2234226584 2008-04 IBSP O. Machado & J. P. P. Barbosa Brazil Cave Gruta 30 431 IBSP 186392 1 1 Minas Gerais 2234226771 2008-01-25 IBSP O. Machado & J. P. P. Barbosa Brazil -20.286388 Cave Gruta Arcaica 21 -45.792778 30 431 IBSP 196169 1 1 Minas Gerais 2234226750 2009-06-25 VI R. A. Zampaulo Brazil -20.417778 Cave Gruta do Angico 21 -45.678333 30 431 IBSP 196125 1 1 Minas Gerais 2234226543 2013-03-30 IBSP M. P. A. Oliveira Brazil -20.401943 Cave Gruta do Carlinhos 21 -45.67278 30 431 IBSP 181830 1 1 Minas Gerais 2234226471 2011-06-04 VI Brazil -20.380001 Cave Gruta 21 -45.62111 30 431 IBSP 186012 1 1 Minas Gerais 2234226514 2008-01-25 IBSP O. Machado & J. P. P. Barbosa Brazil -20.285833 Cave Gruta Trincheira do Vietna 21 -45.793056 30 431 IBSP 196170 1 1 Minas Gerais 2234226473 ICPA A. P. Bueno Brazil Cave 30 431 IBSP 196128 1 1 Minas Gerais 2234226754 [266,1229,1626,1651] 2013-03-18 2013-04-06 2013-03-18 ICPA Brazil -20.366388 Cave 21 -45.6075 30 431 IBSP 196132 1 1 Minas Gerais 2234226539 IV / 2 ICPA Brazil -20.36 Cave 21 -45.610275 30 431 IBSP 196133 1 1 Minas Gerais 2234226480 2013-03-18 2013-04-06 2013-03-18 ICPA Brazil -20.36111 Cave 21 -45.61139 30 431 IBSP 196137 1 1 Minas Gerais 2234226574 [564,1088,1698,1723] ICPA Brazil Cave 30 431 IBSP 196138 2 1 1 Minas Gerais 2234226687 2013-04-01 2013-04-06 2013-04-01 ICPA Brazil -20.379444 Cave 21 -45.59972 30 431 IBSP 196134 1 1 Minas Gerais 2234226502 2013-04-01 2013-04-06 2013-04-01 ICPA Brazil -20.379444 Cave 21 -45.59972 30 431 IBSP 196127 4 2 2 Minas Gerais 2234226721 [379,856,1770,1795] ICPA Brazil Cave 30 431 IBSP 196126 1 1 Minas Gerais 2234226470 2013-04-01 2013-04-06 2013-04-01 ICPA Brazil -20.380278 Cave 30 431 IBSP 196131 1 1 Minas Gerais 2234226562 2009-03-02 SEM Brazil -20.372778 Cave 21 -45.60861 30 431 IBSP 186511 1 1 Minas Gerais 2234226777 [236,1241,1842,1867] 2013-07-29 2013-08-10 2013-07-29 IBSP Brazil -20.371666 Cave 21 -45.614445 30 431 IBSP 186539 2 1 1 Minas Gerais 2234226609 2013-01-14 2013-02-02 2013-01-14 IBSP Brazil -20.36861 Cave 30 431 IBSP 186534 1 1 Minas Gerais 2234226722 [869,1089,1878,1903] 2013-01-14 2013-02-02 2013-01-14 IBSP Brazil true -20.36861 Cave 30 431 IBSP 186538 1 1 Minas Gerais 2234226627 2013-01-29 2013-02-08 2013-01-29 SEM Brazil -20.378056 Cave 21 -45.607777 30 431 IBSP 186520 1 1 Minas Gerais 2234226700 2013-02-18 2013-03-09 2013-02-18 SEM Brazil -20.374445 Cave 21 -45.608334 30 431 IBSP 186512 1 1 Minas Gerais 2234226518 [527,1432,1950,1975] 2013-02-18 2013-03-09 2013-02-18 IBSP Brazil -20.369167 Cave 21 -45.604164 30 431 IBSP 186513 1 1 Minas Gerais 2234226769 [469,1436,1986,2011] 2013-05-15 IM M. T. M. Souza Brazil -20.302221 Cave 21 -45.794445 30 431 1 1 Minas Gerais 2234226593 2013-11-06 IM M. Barcelos 31 432 IBSP 184306 1 1 2234226624 [582,1381,188,213] 2013-04-23 SM M. T. M. Souza 31 432 IBSP 186391 1 1 2234226575 [471,1225,223,248] 2014-02-13 SM Equipe Spelayon 31 432 IBSP 186389 1 1 2234226457 [311,1027,260,285] 2014-02-12 SM Equipe Spelayon 31 432 IBSP 186386 1 1 2234226478 2014-02-20 SM Equipe Spelayon 31 432 IBSP 186387 1 1 2234226758 2014-02-20 SM Equipe Spelayon 31 432 IBSP 186385 2 1 1 2234226720 2014-02-20 SM Equipe Spelayon 31 432 IBSP 186384 1 1 2234226710 2014-02-20 IBSP Equipe Spelayon -20.299444 21 -45.617775 31 432 IBSP 186383 1 1 2234226564 1927-08-02 MIC F. O. Borges 31 432 IBSP 186375 1 1 2234226498 [661,729,439,464] IBSP Equipe Spelayon -20.345835 21 -45.84778 31 432 IBSP 196164 1 1 2234226780 2014-01-13 2014-01-21 2014-01-13 GAND A. P. Bueno 31 432 IBSP 186416 1 1 2234226725 [748,1344,511,536] 1920-03-02 IBSP Equipe Carste 31 432 IBSP 186508 1 1 2234226497 1920-03-02 IBSP Equipe Carste true 31 432 IBSP 186509 2 1 1 2234226619 [326,541,548,573] IBSP 31 432 IBSP 186510 2 2