Mairata itatiaiensis, Calvanese & Brescovit & Bonato, 2019

Calvanese, Victor C., Brescovit, Antonio D. & Bonato, Lucio, 2019, Revision of the Neotropical species of Aphilodontinae (Geophilomorpha, Geophilidae), with eight new species and a first phylogenetic analysis of the subfamily, Zootaxa 4698 (1), pp. 1-72 : 44-46

Mairata itatiaiensis new species

( Figs 3C , 33A, F , 35–36 , 40D , 41G , 44 M–N)

Type specimens. Holotype: ♀, from Parque Nacional de Itatiaia , Itatiaia, Rio de Janeiro, Brazil, 16/12/2017, V. Calvanese & A. Silva col., deposited in IBSP 6177 . Paratypes: 2♀ and 2♂, same data as holotype, deposited in IBSP 6178 .

Type locality. Brazil: Rio de Janeiro: Itatiaia, Parque Nacional de Itatiaia : 22°22′31″S, 44°39′44″W .

Material examined. BRAZIL: Rio de Janeiro: Itatiaia, Parque Nacional de Itatiaia (22°22′31″S, 44°39′44″W) , 4–17/12/2017, V. Calvanese & A. Silva col., 1♂ ( IBSP 6179 ) , 1♀ ( IBSP 6180 ) , 1♂ ( IBSP 6181 ) , 2♀ ( IBSP 6182 ) 1♀ ( IBSP 6183 ) ; 16/12/2017, V. Calvanese & A. Silva col., 1 ♀ [holotype] ( IBSP 6177 ) , 2♀ and 2♂ [paratypes] ( IBSP 6178 ) .

Etymology. The epithet is an adjective, referring to the type locality.

Diagnosis. A species of Mairata n. gen. with: around 61–63 leg-bearing segments; known body length in adults 22–41 mm; distal denticle of forcipular trochanteroprefemur without apical setae ( Fig. 35A ); coxopleuron with 10–20 coxal pores in adults, sparse, in both males and females ( Figs 35B , 36 D–E); females with ultimate legs slightly thickened when compared to penultimate leg ( Fig. 36D ).

Recorded specimens: 11, including 7♀ and 4♂, from a single locality.

Distribution. Brazil—Rio de Janeiro: Itatiaia.

Description of holotype. Female (IBSP 6178).

Entire body: length 30, maximum width 1.05. Cephalic plate: sub-rectangular, length 0.68 and width 0.59 (length/width ratio 1.15), with little SE sparse. Antenna: length 1.57, ca. 2.3 times as long as cephalic plate; AA II–XIII length/width ratio 0.70–0.95; LAA ca. 3.0 times as long as AA XIII.

Clypeus: 4+4 LS, 1+1 PS, 8+8 SCS. Mandible: PL with 27 denticles. First maxillae: TFM length0.08 and width 0.06; DA with 3 apical and 2 subapical SL; MPC with 2–4 apical and 1–2 subapical SL. Second maxillae: left TSM length 0.13 (1.65 times as long as TFM) and maximum width (basal margin) 0.08; left T3 length 0.02 (0.66 times as long as T2) and width 0.02 (0.47 times as long as T2); both TSM with 1 apical SE and 1 apical SL.

Forcipular segment: FTE length 0.25 (0.37 times as long as cephalic plate) and width 0.65; FPT length 0.05 and width 0.50; FCX length 0.61 and width 0.67 (length/width ratio 0.91); FRL length 0.55, extending beyond the anterior margin of cephalic plate, and maximum width (middle part of TFF) 0.27; FRL with two denticles in TFF and one in TI; FD1 relatively large, pointed and without SE; FD2 pointed and with 3 subapical SE; FD3 bilobed and with 3 subapical SE; TA 0.76 times as long as TFF and with small basal DTA.

Walking legs: 63 pairs; left FL length 0.8, 0.9 times as long as the second leg; left leg 31 length 0.93. Tergum from the first to penultimate leg-bearing segment: TE 31 length 0.40 and width 0.70 (length/width ratio 0.57), with one anterior row of 16 SE and one posterior row of 7 SE, and little SE scattered between rows; PT 0.5 times as long as TE and with two parallel rows of 7–8 SE. Sternum from the first to penultimate leg-bearing segment: STF rounded, wider than long; ST 31 length 0.45 and width 0.41 (length/width ratio 1.09).

Ultimate leg-bearing segment: MTL trapezoidal, length 0.25 and maximum width 0.27 (length/width ratio 0.92); UPS exposed and suppressed in middle part. Ultimate legs: thickened when compared to penultimate leg, length 1.07, 1.1 times as long as penultimate leg; each CXP with 16–20 little COP, all sparse. Postpedal segments: GF with 2+2 distal SE.

Known variation. Male: 61 leg-bearing segments; UPS exposed and not suppressed in the middle part; each CXP with 10–12 COP; GM biarticulated; GM1 with 7–8 SE in one row; GM2 with 8–10 scattered SE.

Figures

FIGURE 3. A–D, Aphilodontinae habitus, dorsal: A, Aphilodon silvestrii n. sp. (IBSP 3665); B, Mecophilus neotropicus Silvestri, 1909 (MNHG); C, Mairata itatiaiensis n. sp. (IBSP 6178); D, Philacroterium brevipes (Verhoeff, 1938) n. comb. (KZN 5033). Scale bars: 1 mm (A–D).

FIGURE 33. A–L, Mairata n. gen. diagnostic characters. Mairata itatiaiensis n. sp. Male paratype (IBSP 6178): A, left antenna, ventral; F, article 3 of right telopodite of second maxillae, lateral. Mairata butantan n. sp. Male paratype (IBSP 6178): B, first and second maxillae, ventral; C, first maxillae, ventral; D, right telopodite of second maxillae, ventral; L, terminal part of body, ventral. Female paratype (IBSP 6178): E, article 3 of right telopodite of second maxillae, lateral; G, forcipular segment, ventral; H, right forcipule, ventral; I, tarsungulum and tibia of right forcipule, ventral; J, intermediate part of trunk, left side, lateral; K, terminal part of body, ventral. Abbreviations: DP: depression in pleural region; DTA: denticle of tarsugulum; TSU: tarsus; T2: article 2 of telopodite of second maxillae; T3: article 3 of telopodite of second maxillae. Scale bars: 0.5 (A, J–L), 0.1 (B, G–H), 0.05 (C–D, I), 0.01 (E–F) mm.

FIGURE 35. A–B, Mairata itatiaiensis n. sp. Male paratype (IBSP 6178): A, denticles of forcipule, ventral; B, terminal part of body, ventral. Abbreviations: FD1: distal denticle of forcipular trochanteroprefemur; COP: coxal pores. Scale bars: 0.2 mm (A–B).

FIGURE 36.A–E, Mairata itatiaiensis n. sp. Female paratype (IBSP 6178): A, habitus, ventral; B, anterior part of body, dorsal; C, same, ventral; D, posterior part of body, ventral. Male paratype (IBSP 6178): E, posterior part of body, ventral. Abbreviation: COP: coxal pores. Scale bars: 2 (A), 0.5 (B–E) mm.

FIGURE 40. A–F, anterior part of body, dorsal: A, Dicellophilus carniolensis (Koch, 1847) (PD); B, Aphilodon pereirai n. sp. (IBSP); C, Philacroterium cribellatum Attems, 1926 (SAM); D, Mairata itatiaiensis n. sp. (IBSP); E, Mecophilus neotropicus (MSNG); F, Mecophilus tupiniquim n. sp. (IBSP). Abbreviations: FPT: forcipular pretergite; FTE: forcipular tergite. Scale bars: 0.5 mm (A–F).

FIGURE 41. A–L, forcipular segment, ventral: A, Dicellophilus carniolensis (Koch, 1847) (PD); B, Hyphydrophilus adisi Pereira, Minelli & Barbieri, 1994 (PD); C, Macronicophilus abbreviatus Pereira, Foddai & Minelli, 2000 (INPA); D, Strigamia crassipes (Koch, 1835) (PD); E, Henia vesuviana (Newport, 1844) (PD); F, Geoperingueyia dentata Verhoeff, 1938 (MNRJ); G, Mairata itatiaiensis n. sp. (IBSP); H, Mecophilus neotropicus Silvestri, 1909 (MSNG); I, Aphilodon micronyx Brölemann, 1902 (IBSP); J, Aphilodon silvestrii n. sp. (IBSP); K, Philacroterium cribellatum Attems, 1926 (SAM); L, Philacroterium brevipes (Verhoeff, 1938) n. comb. (KZN). Scale bars: 0.2 mm (A–L).

FIGURE 44. A–P, ultimate leg-bearing segment, ventral: A, Dicellophilus carniolensis (Koch, 1847) (PD), male; B, Pachymerium ferrugineum (Koch, 1835) (PD), female; C, Macronicophilus abbreviatus Pereira, Foddai & Minelli, 2000 (INPA), male; D, Henia vesuviana (Newport, 1844) (PD), male; E, Strigamia crassipes (Koch, 1835) (PD), male; F, Geoperingueyia dentata Verhoeff, 1938 (MNRJ), female; G, Geoperingueyia dentata Verhoeff, 1938 (MNRJ), male; H, Philacroterium maritimum (Lawrence, 1963) n. comb (KZN), female; I, Philacroterium brevipes (Verhoeff, 1938) n. comb. (KZN), male; J, Philacroterium cribellatum Attems, 1926 (NHMW), male, (photo by N.Akkari); K, Mecophilus tupiniquim n. sp. (IBSP), female; L, Mecophilus tupiniquim n. sp. (IBSP), male; M, Mairata itatiaiensis n. sp. (IBSP), female; N, Mairata itatiaiensis n. sp. (IBSP), male; O, Aphilodon micronyx Brölemann, 1902 (IBSP), female; P, Aphilodon pereirai n. sp. (IBSP), male. Scale bars: 0.2 mm (A–P).