Aphilodon spegazzinii 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: 21-23

publication ID

https://doi.org/10.11646/zootaxa.4698.1.1

publication LSID

lsid:zoobank.org:pub:0B4482B9-F89F-45CA-B929-E9B098605CD5

persistent identifier

http://treatment.plazi.org/id/06130E72-A510-FFF4-FF34-FAC5FD03AF6A

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scientific name

Aphilodon spegazzinii Silvestri, 1898
status

 

Aphilodon spegazzinii Silvestri, 1898 

( Figs 13A, CView FIGURE 13, 14–15View FIGURE 14View FIGURE 15)

Aphilodon Spegazzinii  [sic] Silvestri 1898: 40 (original description); Silvestri 1909a: 268 (in key); Silvestri 1909b: 54 (descrip- tion), 55, 56, fig. 9. Aphilodon Spegazzini  [sic]: Brölemann 1902: 48. Aphilodon spegazzinii: Attems 1903: 283  ; Attems 1929: 315 (description; in key), fig. 282; Pereira 1998: 473; Foddai et al.

2000: 105; Pereira et al. 2007: 47 (in key); Bonato et al. 2011: 408; Koch & Edgecombe 2012: 41. Aphilodon spegazzini  [sic]: Bücherl 1940: 313.

Type specimens. Syntypes: 4♀, 2♂ from “Las [sic] Talas, prope La Plata” ( Silvestri, 1898, 1909b), collected in 1898 (without name of collector), deposited in MCSG “Vase type XXVI”; specimens labeled “a–f”.

Type locality. Argentina: Los Talas, near La Plata  .

Material examined. ARGENTINA. Misiones: Los Talas, near La Plata, 1898, 4♀, 2♂ [syntypes] (MCSG)  .

Diagnosis. A species of Aphilodon  with: around 61–65 leg-bearing segments; known body length in adults 22–45 mm; cephalic plate length/width ratio ca. 1.1; antenna ca. 3-4 times as long as t cephalic plate, with some articles longer than wide; 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 2 subapical setae and a short sensillum in between; forcipular pretergite exposed; forcipule with lateral margin posteriorly straight; tarsungulum 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 rela- tively small; distal denticle of trochanteroprefemur and denticle of femur separate; all pleurites conspicuous; each coxopleuron with 17–31 coxal pores in adults; ultimate presternite exposed and apparently divided in middle part; metasternite of ultimate leg-bearing segment length/width ratio ca. 1.4; ultimate legs ca. 1.6 times as long as penultimate legs, with tarsus 1 ca. 1.5 times as long as the tibia.

A. spegazzinii  differs from all other species of Aphilodon  by having antennae>3 times as long as cephalic plate ( Fig. 14AView FIGURE 14, 15BView FIGURE 15) and metasternite of ultimate leg-bearing segment longer than wide ( Figs 14BView FIGURE 14, 15EView FIGURE 15).

Recorded specimens: 6, including 4♀ and 2♂, from one locality.

Distribution. Argentina—Misiones: Los Talas, near La Plata ( Silvestri 1898, 1909b).

Description of a syntype. Female specimen “a”.

Entire body: length 35, maximum width 0.75. Cephalic plate: sub-quadrate, length 0.39 and width 0.37 (length/ width ratio 1.05). Antenna: length 1.32, 3.4 times as long as cephalic plate; AA II–IV length/width ratio 1.0–1.1; AA V–XIII length/width ratio 0.85–0.95; LAA ca. 2.0 times as long as the previous article.

Clypeus: 6+6 LS, 2+2 PS, 15+15 SCS. Mandible: PL with about 20 small denticles. First maxillae: TFM length 0.08 and width 0.03; DA with 1+1 SE and 3+3 SL; MPC with 1+1 SE. Second maxillae: 8 SE arranged in a row along the posterior margin of CSM, between TSM; left TSM length 0.07 (1.02 times as long as TFM) and maximum width (basal margin) 0.03; both T3 with 2 lateral SE and one little SL in subapical region.

Forcipular segment: FTE trapezoidal, length 0.19 (0.48 times as long as cephalic plate) and maximum width 0.51, with little scattered SE; FPT length 0.10 and width 0.30; FCX length 0.44 and width 0.50 (length/width ratio 0.88); left FRL length 0.36, two denticles on TFF and one in TI, all relatively large; FD1 with one apical and one subapical SE, FD2 with two apical and one subapical SE, FD3 with two apical and one subapical SE; TA with a small DTA, ca. 0.9 times as long as TFF.

Walking legs: 65 pairs; FL 0.82 times as long as the second leg, with procoxae not extended to the body midline; leg 35 with 0.4 long. Tergum from first to penultimate leg-bearing segment: TE rectangular, with slightly rounded lateral margins, not extending to the pleural region; TE 35 length 0.17 and width 0.35; with 2 rows of 8+8 SE and 2+2 lateral SE; PT quite evident along the body, ca. 1/3 as long and slightly narrower than the tergite; ca. 7 SE arranged in a row in central region of tergite. Sternum from first to penultimate leg-bearing segment: STF wider than long, ST uniformly rectangular, longer than wide; ST 35 length 0.25 and width 0.21; PST visible along the body as a continuous band.

Ultimate leg-bearing segment: MTL pentagonal, longer than wide, length 0.18 and width 0.12 (length/width ratio 1.40); UPS divided into two structures in sagittal plane. Ultimate legs: telopodite length 0.95, ca. 1.6 times as long as penultimate leg; each CXP with 28–31 COP, sparse and of varying diameters; tarsus 1 ca. 1.5 times as long as the tibia. Postpedal segments: GF with 1+1 distal SE.

Known variation. Male: GM biarticulated; GM1 wider than long, with about 8 SE in 2 rows; GM2 triangular, tapering to distal region, with 12–16 scattered SE.

Kingdom

Animalia

Phylum

Arthropoda

Class

Chilopoda

Order

Geophilomorpha

Family

Aphilodontidae

Genus

Aphilodon

Loc

Aphilodon spegazzinii Silvestri, 1898

Calvanese, Victor C., Brescovit, Antonio D. & Bonato, Lucio 2019
2019
Loc

Aphilodon

Silvestri, F. 1909: 268
Silvestri, F. 1909: 54
Silvestri, F. 1898: 40