Aphilodon silvestrii

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: 35-37

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Aphilodon silvestrii

new species

Aphilodon silvestrii  new species

( Figs 3AView FIGURE 3, 4CView FIGURE 4, 5CView FIGURE 5, 6View FIGURE 6 B–J, L, 10D–F, 11E–F, 12C–D, 27–28, 41J, 42E)

Type specimens. Holotype: ♀, from Parque Ecológico da Mata da Câmara , São Roque, São Paulo, Brazil, 06/2014, V. Calvanese & M. Pereira col., deposited in IBSP 3665  . Paratypes: 3♂, same data as holotype, deposited in IBSP 3066  ; 7♀, same locality of holotype, 07/2015, V. Calvanese, deposited in IBSP 4080  .

Type locality. Brazil: São Paulo: São Roque: Parque Ecológico da Mata da Câmara : 23°31’41”S, 47°6’51”WGoogleMaps  .

Material examined. BRAZIL. São Paulo: São Roque, Parque Ecológico da Mata da Câmara (23°31’41”S, 47°6’51”W), 06/2014GoogleMaps  , V. Calvanese col., 1♀ [holotype] ( IBSP 3065View Materials)  , 3♂ [paratypes] ( IBSP 3066View Materials)  ; 07/2015, V. Calvanese col., 7♀ [paratypes] ( IBSP 4080View Materials)  .

Etymology. The epithet is a noun in the genitive case, in honor of Filippo Silvestri, great myriapodologist who described Aphilodontinae and other species of Geophilomorpha  .

Diagnosis. A species of Aphilodon  with: around 69–71 leg-bearing segments; known body length in adults 22–61 mm; cephalic plate length/width ratio ca. 1.3; antenna ca. 1.3-1.9 times as long as cephalic plate; pectinate lamella of mandible with straight denticles; coxosternite of second maxillae not distinctly shorter in middle part; telopodite of second maxillae with article 3 shorter than article 2, with two 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 relatively small, with basal margin coalescent with basal margin of denticle of femur; all pleurites conspicuous; each coxopleuron with 23–34 coxal pores in adults, all sparse; ultimate presternite apparently divided in middle part; metasternite of ultimate leg-bearing segment length/width ratio ca. 0.8–0.9; ultimate legs ca. 1.7 times as long as penultimate legs, with tarsus 1 ca. 1.5 times as long as the tibia.

A. silvestrii  n.sp. differs from all other species of Aphilodon  by having relatively short antenna ( Fig. 28View FIGURE 28 B–C) and a relatively small distal denticle of trochanteroprefemur, with a basal margin coalescent with basal margin of denticle of femur ( Fig. 27BView FIGURE 27, 28CView FIGURE 28).

Recorded specimens: 11, including 8♀ and 3♂, from a single locality.

Distribution. Brazil—São Paulo: São Roque.

Description of holotype. Female (IBSP 3665).

Entire body: length 53 and maximum width 0.8. Cephalic plate: trapezoidal, with anterior margin wider than posterior margin, length 0.60 and maximum width 0.45 (length/width ratio 1.33), with little scattered SE. Antenna: length 1.09, 1.8 times as long as cephalic plate; AA II–XIII length/width ratio 0.4–0.6; LAA slightly less than twice as long as AA XIII.

Clypeus: 5+5 LS, 1+1 PS, 12+12 SCS. Mandible: PL with 25 denticles. First maxillae: TFM length 0.07 and width 0.06; DA with 2 SE each, near the internal side and 3 or 4 SL displaced in a row near apex of structure; MPC with 2+2 SL and 1+1 apical SE. Second maxillae: 8 SE in a row along posterior margin of CSM, between TSM; left TSM length 0.10 (1.47 times as long as TFM) and maximum width (basal margin) 0.05, with two large apical SE; right TSM with two smaller subapical SE.

Forcipular segment: FTE length 0.16 (0.26 times as long as cephalic plate), maximum width 0.49, and scattered SE; FPT length 0.09 and width 0.32; FCX length 0.58 and width 0.70 (length/width ratio 0.82); left FRL length 0.49, reaching anterior margin of cephalic plate; TFF with 2 denticles; FD1 pointed and without apical SE, with basal margin coalescent with the basal margin of FD2; FD2 apically more rounded than FD1, with a large subapical SE and a little apical SE; FD3 smaller than FD2, with one apical and one subapical SE; TA 0.95 times as long as TFF, with DTA relatively small.

Walking legs: 69 pairs; FL 0.64 times as long as second leg, with procoxae not extended to midline of the body; leg 35 length 0.75. Tergum from the first to penultimate leg-bearing segment: TE rectangular, TE 35 length 0.32 and width 0.80; PT little narrower, with width 0.72 and length 0.20; 7 small SE in a row in PT and 6+6 (distal and basal) SE along margins of TE. Sternum from the first to penultimate leg-bearing segment: STF wider than long, sub-elliptic; other ST sub-quadrate, mostly longer than wide; ST 25 length 0.28 and width 0.25; PST vestigial in most anterior segments of body, but exposed from segment 7.

Ultimate leg-bearing segment: MTL trapezoidal, wider than long, length 0.28 and width 0.35 (length/width ratio 0.8); UPS apparently divided in middle part (Figs 73A–B). Ultimate legs: length 1.47 (1.7 times as long as penultimate leg); each CXP with 28+32 COP, uniform in size; tarsus 1 ca. 1.5 times as long as tibia. Postpedal segments: GF with 4+4 SE arranged in a distal row.

Known variation. Male: ultimate legs more thickened and with little more SE; GM1 with 8 SE in two rows, and GM2 with 11–15 scattered SE. Juveniles: COP 5–8 (N= 2♀, 2♂) (IBSP 4082).