Exallostreptus vanzolinii Hoffman, 1988

Iniesta, Luiz Felipe Moretti, Bouzan, Rodrigo Salvador, Battirola, Leandro Dênis & Brescovit, Antonio Domingos, 2022, New records for the poorly-known monotypic genera Exallostreptus and Guaporeptus, and a list of species from Mato Grosso state, Brazil (Diplopoda: Spirostreptida: Spirostreptidae), Papéis Avulsos de Zoologia 62, pp. 1-12 : 3-4

Exallostreptus vanzolinii Hoffman, 1988

( Figs. 1 ; 2 ; 4-5 ; 6 A-B)

Exallostreptus vanzolinii Hoffman, 1988a: 324 (male holotype from Nova EsperanÇa, Rondônia, Brazil, 02-09. xii.1983,P.E.Vanzolinileg.,depositedinMZSP,examined).

Diagnosis: Same for the genus.

Material examined: Brazil: Mato Grosso: Cuiabá [15°35′19.8″S, 56°06′21.9″W], 10.v.2012, ♂ ( CZUFMT) ;

Chapada dos Guimarães [15°28′00.9″S, 55°45′04.8″W], cerrado, ♂, ♀ ( CZUFMT) ; 29.iii.2013, ♂ ( CZUFMT) ; CotriguaÇu, Fazenda São Nicolau [09°51′21.9″S, 58°14′51.8″W], 02.xi.2014, M. Karam-Gemael leg., ♂, ♀ ( CZUFMT) ; 28.ii.2011, D.A. Batistella leg., ♂ ( CZUFMT) ; 10.xi.2010, D.A. Batistella leg., ♂ ( ABAM 0027 ) ; Aripuanã [10°10′32.3″S, 59°27′00.5″W], 15.xii.2003, C. Strussmann leg., ♂ ( CZUFMT) ; 12.xii.2003, 2 ♂♂, ♀ ( CZUFMT) ; Cláudia, Fazenda Continental [11°30′07.5″S, 55°12′18.3″W], Florestas Secas de Mato Grosso, 01.ii.2010, D.A. Batistella leg., ♂ ( CZUFMT) ; Sinop [11°52′23.2″S, 55°30′02.0″W], 21.i.2010, ♂ ( CZUFMT) ; Parque Estadual do Cristalino [09°31′32.3″S, 55°39′07.2″WW], 13.xii.2012, D. Oliveira leg., ♂ ( ABAM 0107 ) ; 15.xi.2012, D. Oliveira leg., ♂, ♀ ( ABAM 0102 ) .

Descriptive notes: Male, see description in Hoffman (1988a: 324, figs. 1-7). Size: Body length 102-110 mm, vertical midbody diameter 4.8-5.2 mm., 65-72 podous body rings. The examined specimens from Mato Grosso resemble those from Nova EsperanÇa by general somatic characteristics, in particular the prominent lateral end of collum ( Fig. 2A, C ) and the large distal edges of the paraprocts ( Fig. 2B, D ). Males agree in having densely setose prefemoral process (pfp) in first leg-pair ( Fig. 6 A-B); proplica (pp) with lateral lobe expanded, telopodite (tp) with lamellar expansion, and elongated antetorsal process with a complete 360° torsion ( Figs. 4 A-B; 5A-F). Ventral pads on postfemur and tibia on midbody legpairs ( Fig. 4D ). Females with nonsexual characters as in males ( Fig. 2 C-D).

Distribution: The species was known only from its type locality Nova EsperanÇa, Rondônia; now also known in the state of Mato Grosso (Madeira, Xingu-Tapajós, and Cerrado provinces) (up to ca. 2,000 km. from Nova EsperanÇa).

Figures

Figure 1. Distribution map of Exallostreptusvanzolinii (triangle) and Guaporeptus paradisius(square).Thecolours scheme refers tothe biogeographical regionalization of the Neotropical region (see Morrone, 2014). Abbreviations:Mp = Madeira province;XTp = Xingu-Tapajós province;Rp = Rondônia province;Cp = Cerrado province.This figure is in color in the electronic version.

Figure 2.Exallostreptus vanzolinii. Male: (A) Anterior region; (B) Posterior region. Female: (C) Anterior region; (D) Posterior region. The arrows indicate the distal edges of the paraprocts.This figure is in color in the electronic version.

Figure 4. Exallostreptusvanzolinii,males:(A)Gonopod inanterior view;(B)Gonopod inposteriorview;(C)Second leg-pair;(D) Midbodyleg-pair.Thearrows indicate the ventral pads.Scale bars in A-C = 1 mm;D = 2 mm.See abbreviations in material and methods.This figure is in color in the electronic version.

Figure 5.Exallostreptusvanzolinii,males,SEMimages:(A) Gonopod inanteriorview;(B)Detail ofdistal regionof gonopod,inanteriorview;(C)Gonopod inposterior view;(D) Detail of distal region of telopodite;(E) Detail of telopodite and antetorsal process;(F) Detail of telopodite.Scale bars in A, C,E = 1 mm; B, F = 500 µm., D = 400 µm.See abbreviations in materialand methods.This figure is in color in the electronic version.

Figure 6. First leg-pair of males, SEM images:Exallostreptus vanzolinii: (A) First leg-pair in anterior view; (B) Detail of prefemoral process. Guaporeptus paradisius: (C) First leg-pair in anterior view;(D) Detail of prefemoral process.Scale bars in A, C = 1 mm;B,D = 400 µm. See abbreviations in materialand methods.This figure is in color in the electronic version.