Aphilodon pereirai, 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 : 33-35

Aphilodon pereirai new species

( Figs 4A , 10 B–C, 13B, D, 25–26, 37B, 38G–H, 40B, 43C, 44P, 46C)

Type specimens. Holotype: ♀, from Monte Verde, Minas Gerais, Brazil, 09/2015, V. Calvanese & A. Silva col., deposited in IBSP 4067 . Paratypes: 2♀, 2♂, same data as holotype, deposited in IBSP 4078 .

Type locality. Brazil: Minas Gerais: Monte Verde : 22°51’35”S, 46°02’15”W .

Material examined. BRAZIL. Minas Gerais: Monte Verde, 09/2015 , V. Calvanese & A. Silva col., 1♀ [holo- type] ( IBSP 4067 ) , 2♀ and 2♂, [ paratypes] ( IBSP 4078 ) , 13♀ and 5♂ ( IBSP 3784 ) .

Etymology. The epithet is a noun in the genitive case, in honor of Luis Alberto Pereira, who is one of the greatest specialists in Neotropical Geophilomorpha .

Diagnosis. A species of Aphilodon with: around 73–77 leg-bearing segments; known body length in adults 23–71 mm; cephalic plate length/width ratio 1.3–1.4; antenna ca. 2.3-2.7 times as long as cephalic plate; pectinate lamella of mandible with curved denticles; coxosternite of second maxillae not distinctly shorter in middle part; telopodite of second maxillae with article 3 shorter than article 2, with 1–4 setae in apical or subapical position and a sensillum in subapical position; forcipular pretergite exposed; forcipule with lateral margin posteriorly straight; tarsungulum ca. 0.9 times as long as trochanteroprefemur+femur; forcipule with 3+1 denticles; distal denticle of trochanteroprefemur, denticle of femur and denticle of tibia relatively large and denticle of tarsungulum relatively small; all pleurites conspicuous; each coxopleuron with 22–44 coxal pores in adults, all sparse; ultimate presternite not visible; metasternite of ultimate leg-bearing segment length/width ratio ca. 0.7–0.8; ultimate legs ca. 1.5 times as long as penultimate legs, tarsus 1 ca. 1.2 times as long as tibia.

A. pereirai n. sp. differs from all other species of Aphilodon by having pectinate lamella of mandible with curved denticles ( Fig. 25 A–B) and ultimate presternite not visible ( Figs 25E , 26E );

Recorded specimens: 23, including 16♀ and 7♂, from a single locality.

Distribution. Brazil—Minas Gerais: Monte Verde.

Description of holotype. Female (IBSP 4067).

Entire body: length 38, maximum width 0.78. Cephalic plate: length 0.55 and maximum width 0.40 (length/ width ratio 1.37), with little scattered SE. Antenna: length 1.3, 2.4 times as long as cephalic plate; AA II–XIII length/ width ratio 0.45–0.98; LAA 1.5 times as long as AA XIII.

Clypeus: 7+7 LS, 2+2 PS, 15+17 SCS, two SCS being displaced to each side. Mandible: PL with 27 elongate and curved denticles. First maxillae: TFM length 0.10 and width 0.06; DA with 1+1 SE and 3 apical SL; each MPC with two rows of 3 short SE in middle part, and 2 apical SL. Second maxillae: 8 SE arranged in a row along posterior margin of CSM, between TSM, and 3+3 short SE close to margin; left TSM length 0.14 (ca. 1.4 times as long as TFM) and maximum width (basal part) 0.06; left TSM with 3 apical and 1 subapical SE; right TSM with 2 SE and 1 SL in apical region, and 1 SL in subapical region.

Forcipular segment: FTE trapezoidal, length 0.35 (0.63 times as long as cephalic plate) and maximum width 0.71, with few sparse SE; FPT length 0.12 and width 0.40; FCX length 0.42 and width 0.51 (length/width ratio 0.82); FRL length 0.45, not reaching the anterior margin of cephalic plate; two denticles in TFF and one in TI, all relatively large; FD1 with 1 short apical SE, FD2 with 3 subapical and 1 apical SE, FD3 with 3 subapical and 1 apical SE; TA 0.95 times as long as FRL; DT relatively small.

Walking legs: 75 pairs; FL 0.65 times as long as the second leg, with procoxae not extended to midline of body; leg 30 length 0.69; anterior and posterior accessory spines relatively long. Tergum from first to penultimate legbearing segment: TE rectangular, extending over lateral sides of body; TE 30 length 0.30 and width 0.76; 12+12 SE loosely grouped along anterior and posterior margins of TE, and some shorter SE in middle part; PT exposed along body, about 1/4 times as long and slightly narrower than TE, with two rows of 9–12 shorter SE and 5–10 SE scattered among rows. Sternum from first to penultimate leg-bearing segment: STF wider than long, sub-rectangular; other ST approximately as long as wide or slightly longer than wide; ST 30 length 0.28 and width 0.28; PST exposed from segment 12.

Ultimate leg-bearing segment: MTL trapezoidal, wider anteriorly than posteriorly, length 0.21 and width 0.29 (length/width ratio 0.72); UPS apparently absent. Ultimate legs: length 1.56, 1.45 times as long as penultimate leg; each CXP with ca. 40 COP, of relatively homogeneous diameter, with a distinct distal pore; tarsus 1 1.2 times as long as tibia. Postpedal segments: GF with 3+3 distal SE.

Known variation. Male: GM biarticulated; GM1 wider than long, with 7 or 8 SE in two rows; GM2 triangular, tapering to distal region, with 12 scattered SE.

Figures

FIGURE 4. A–H, Aphilodontinae antenna. Aphilodon pereirai n. sp. (IBSP 3784): A, left antenna, ventral. Mairata butantan n. sp. (IBSP 3663): B, left antenna, ventral. Aphilodon silvestrii n. sp. (IBSP 3665): C, last antennal article of the left antenna,,ventral. Aphilodon indespectus n. sp. (IBSP 3653): D, terminal part of the left antenna, lateral; E, terminal part of the last antennal article of the left antenna, lateral; F, claviform sensilla, ventral; G, specialized setae of type “a”, ventral; H, specialized setae of type “b”, ventral. Abbreviations: CSS: claviform sensilla; SSA: specialized setae of type “a”. SSB: specialized setae of type “b”. Scale bars: 0.5 (A–B), 0.1 (C–D), 0.025 (E), 0.005 (F–H) mm.

FIGURE 10. A–F, Aphilodontinae leg-bearing segments. A. caboclos n. sp. (IBSP 4073): A, intermediate part of trunk, dorsal. Aphilodon pereirai n. sp. (IBSP 3784): B, intermediate part of trunk, lateral. Color legend: red, scutellum; green, stigmatopleurite; lilac, posterior sclerite “I”; yellow, anterior sclerite “II”; light blue, anterior sclerite “III”; dark blue, anterior sclerite “III”; C, intermediate part of trunk, ventral. Aphilodon silvestrii n. sp. (IBSP 3665): D, intermediate part of trunk, ventral; E, left leg of an intermediate trunk segment, lateral; F, terminal claw of leg of a intermediate trunk segment, ventral. Abbreviations: AAS: anterior accessory spine; MST: metasternite; PAS: posterior accessory spine; PST: presternite; PTE: pretergite; TE: tergite. Scale bars: 0.5 (A–E), 0.01 (F) mm.

FIGURE 25. A–E, Aphilodon pereirai n. sp. Female paratype (IBSP 3784): A, mandibles, dorsal; B, pectinate lamella of left mandible, dorsal; C, apex of article 3 of the left telopodite of second maxillae, lateral; D, denticles of right forcipule, ventral; E, terminal part of body, ventral. Abbreviations: MTL: metasternite of ultimate leg-bearing segment. Scale bars: 0.1 (A, D–E), 0.03 (B–C) mm.

FIGURE 26. A–E, Aphilodon pereirai n. sp. Female paratype (IBSP 3784): A, habitus, ventral. Male paratype (IBSP 3784): B, anterior part of body, dorsal; C, same, ventral; D, terminal part of body, dorsal; E, same, ventral. Scale bars: 1 mm (A–E).