Aphilodon, Silvestri, 1898

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 : 57

Key to Aphilodon species

1. Cephalic plate longer than wide, without a distinct transverse suture; coxosternite of second maxillae more or less quadrangular, only slightly shorter in the middle part................................................................. 2

- Cephalic plate wider than long, with a distinct transverse suture ( Fig. 17B ); coxosternite of second maxillae distinctly shorter in middle part ( Fig. 7A )........................................................................ A. micronyx

2. Antenna less than 2.7 times as long as cephalic plate; metasternite of ultimate leg-bearing segment wider than long....... 3

- Antenna more than 3.0 times as long as cephalic plate ( Fig. 15B ); metasternite of ultimate leg-bearing segment longer than wide ( Fig. 14B )............................................................................. A. spegazzinii

3. Forcipular tarsungulum shorter than trochanteroprefemur+femur; metasternite of ultimate leg-bearing segment length/width ratio> 0.6........................................................................................... 4

- Forcipular tarsungulum longer than trochanteroprefemur+femur ( Figs 19B , 20C ); metasternite of ultimate leg-bearing segment length/width ratio <0.5 ( Fig. 19C , 20G )...................................................... A. caboclos n. sp.

4. Pectinate lamella of mandible with straight denticles; ultimate presternite visible in males and females................. 5

- Pectinate lamella of mandible with curved denticles ( Figs 25 A–B); ultimate presternite not visible in males and females ( Figs 25E , 26E )............…....................................................................... A. pereirai n. sp.

5. Forcipule with distal denticle of trochanteroprefemur and denticle of femur separated at their bases; body in adults less than 25 mm long; up to 59 pairs of legs; up to 15 coxal pores on each coxopleuron in adults................................ 6

- Forcipule with distal denticle of trochanteroprefemur and denticle of femur with coalescent bases ( Figs 27B , 28C ); body in adults more than 30 mm long; 69 or more pairs of legs; more than 20 coxal pores on each coxopleuron in adults ( Fig. 28E )........................................................................................ A. silvestrii n. sp.

6. Forcipule with at least distal denticle of trochanteroprefemur and denticle of femur relatively large.................... 7

- Forcipule with distal denticle of trochanteroprefemur, denticle of femur and denticle of tibia almost absent ( Fig. 21A ).......................................................................................... A. indespectus n. sp.

7. 45 or more pairs of legs; forcipular pretergite not covered by cephalic plate....................................... 8

- Up to 39 pairs of legs; forcipular pretergite totally covered by cephalic plate ( Fig. 24B )................ A. meganae n. sp.

8. Cephalic plate length/width ratio <1.20 ( Figs 40 A–D); antenna distinctly tapering to tip; less than 10 coxal pores on each coxopleuron in adults.................................................................................. 9

- Cephalic plate length/width ratio ca. 1.25; antenna not distinctly tapering to tip; more than 15 coxal pores on each coxopleuron in adults (Silvestri, 1909: Fig. X).............................................................. A. intermedius

9. Up to 45 pairs of legs; denticle of trochanteroprefemur and denticle of femur relatively large, denticle of tibia almost absent; approximately 5 coxal pores on each coxopleuron in adults (Silvestri, 1909: Fig. XI)....................... A. modestus

- Around 53–59 pairs of legs; denticle of trochanteroprefemur, denticle of femur and denticle of tibia relatively large; 7–10 coxal pores on each coxopleuron in adults ( Fig. 18D ).................................................... A. angustatus

Figures

FIGURE 7. A–D, Aphilodontinae second maxillae, ventral: A, Aphilodon micronyx Brölemann, 1902 (IBSP); B, Philacroterium maritimum (Lawrence, 1963) n. comb. (KZN); C, Aphilodon caboclos n. sp. (IBSP); D, Mairata butantan n. sp. (IBSP). Abbreviations: MP: medial part of coxosternite of second maxillae; TSM: telopodite of second maxillae. Scale bars: 0.1 mm (A–D).

FIGURE 14. A–B, Aphilodon spegazzinii Silvestri, 1898 (MSNG “Vase type XXVI”: specimen “b”): A, antennal article III and IV, ventral; B, metasternite of the ultimate leg-bearing segment, ventral. Abbreviations: MTL: metasternite of the ultimate leg-bearing segment; UPS: ultimate presternite. Scale bars: 0.05 mm (A–B).

FIGURE 15. A–E, Aphilodon spegazzinii Silvestri, 1898 (MSNG “Vase type XXVI”: specimen “b”): A, habitus, ventral; B, anterior part of body, dorsal; C, same, ventral; D, terminal part of body, dorsal; E, same, ventral. Scale bars: 0.4 (A), 0.8 (B–C), 0.5 (D–E) mm.

FIGURE 17. A–E, Aphilodon micronyx Brölemann, 1902. Female (IBSP 6175): A, habitus, dorsal; B, anterior part of body, dorsal; C, same, ventral; D, terminal part of body, ventral. Male (IBSP 6175): E, terminal part of body, ventral. Scale bars: 1 (A), 0.5 (B–E) mm.

FIGURE 18. A–D, Aphilodon angustatus Silvestri, 1909. Male (IBSP 3655): A, left telopodite of second maxillae, ventral; B, article 3 of second maxillae telopodite, ventro-lateral; C, forcipular segment, ventral; D, terminal part of body, ventral. Scale bars: 0.01 (A–B), 0.3 (C–D) mm.

FIGURE 19. A–C, Aphilodon caboclos n. sp. Female paratype (IBSP 4073): A, first and second maxillae, ventral; B, forcipular segment, ventral; C, terminal part of body, ventral. Abbreviations: MTL: metasternite of the ultimate leg-bearing segment; TA: tarsungulum; TFF: trochanteroprefemur+femur; TFM: telopodite of first maxillae; TSM: telopodite of second maxillae. Scale bars: 0.1 mm (A–C).

FIGURE 20. A–G, Aphilodon caboclos n. sp. Female paratype (IBSP 4073): A, habitus, ventral; B, anterior part of body, dorsal; C, same, ventral; D, intermediate part of trunk, dorsal; E, same ventral; F, terminal part of body, dorsal; G, same, ventral. Scale bars: 2 (A), 0.5 (B–G) mm.

FIGURE 21. A–C, Aphilodon indespectus n. sp. Female paratype (IBSP 3653): A, forcipular segment, ventral; B, intermediate part of trunk, left side, lateral; C, terminal part of body, ventral. Color legend: red, scutellum; green, stigmatopleurite; lilac, posterior sclerite “I”; yellow, anterior sclerite “II”; light blue, anterior sclerite “III”; dark blue, anterior sclerite “III”. Abbreviations: TSU, tarsus. Scale bars: 0.3 mm (A–C).

FIGURE 24. A–E, Aphilodon meganae n. sp. Male paratype (IBSP 4070): A, habitus, ventral; B, anterior part of body, dorsal; C, same, ventral; D, terminal part of body, dorsal; E, same, ventral. Scale bars: 2.2 (A), 0.4 (B–C), 0.2 (D–E) 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).

FIGURE 27. A–C, Aphilodon silvestrii n. sp. Female paratype (IBSP 3665): A, article 3 of the left telopodite of second maxillae, ventral; B, left forcipule, ventral; C, metasternite of ultimate leg-bearing segment, ventral. Abbreviations: FD1: distal denticle of trochanteroprefemur; MTL: metasternite of ultimate leg-bearing segment; PST: presternite. Scale bars: 0.05 (A), 0.1 (B–C) mm.

FIGURE 28. A–E, Aphilodon silvestrii n. sp. Female paratype (IBSP 3665): A, habitus, ventral; B, anterior part of body, dorsal; C, same, ventral; D, terminal part of body, dorsal; E, same, ventral. 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).