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