Aphilodon angustatus

(Fig. 18)

Diagnosis. A species of Aphilodon with: around 53 – 59 leg-bearing segments; known body length in adults 11 – 19 mm; cephalic plate length / width ratio 1.1 – 1.2; antenna ca. 2 times as long as cephalic plate; pectinate lamella of mandible with straight denticles; coxosternite of second maxillae not distinctly shorter in middle part; forcipular pretergite exposed; telopodite of second maxillae with article 3 shorter than article 2 and with 2 subapical setae and a short sensillum between; forcipule with lateral margin posteriorly straight; tarsungulum ca. 0.8 – 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; distal denticle of trochanteroprefemur and denticle of femur separate; all pleurites conspicuous; each coxopleuron with 6 – 8 coxal pores in adults; ultimate presternite entire or apparently divided in middle part; metasternite of ultimate leg-bearing segment length / width ratio ca. 0.7; ultimate legs ca. 1.7 – 1.8 times as long as penultimate legs, with tarsus 1 1.1 – 1.2 times as long as tibia. A. angustatus differs from all other species of Aphilodon by having: around 53 – 59 leg-bearing segments; body length less than 25 mm; distal denticle of trochanteroprefemur, denticle of femur and denticle of tibia relatively large and denticle of tarsungulum being relatively small (Fig. 18 C); less than 10 coxal pores on each coxopleuron in adults. Recorded specimens:> 25, including 17 ♀ and 5 ♂, from 10 localities.

Distribution. Argentina — Misiones: Corrientes, San Pedro (Silvestri 1909 b). Brazil — Mato Grosso: Corumbá, Urucum (Silvestri 1909 b); Poconé, Pirizal (Pereira et al. 2007); Nossa Senhora do Livramento (Battirola et al. 2017). Brazil — São Paulo: Bananal (new record); Cotia, Caucaia do Alto (new record); Iporanga, Parque Estadual do Alto do Ribeira (new record); “ zona araraquarense ” (Bücherl 1942 a). Brazil — Paraná: Sangés (new record). Paraguay — Paraguarì (Silvestri 1909 b). Known variation. Sternite of the ultimate leg-bearing segment: shorter in middle in all specimens from Parque Estadual do Alto do Ribeira (PETAR) (N = 3 ♀, 2 ♂).

Type specimens. Syntypes: 1 ♀, 1 ♂, from “ Corrientes, S. Pedro (Missiones [sic], Argentina) ” (Silvestri, 1909 b), F. Silvestri col., 1909; deposited in MCSG “ Vase type XVIII ”; specimens labeled “ a – b ”. Type locality. Argentina: Misiones: San Pedro: Corrientes. Material examined. ARGENTINA. Misiones: Corrientes, San Pedro, 1909, F. Silvestri col., 1 ♀, 1 ♂ [syn- types] (MCSG). BRAZIL. Mato Grosso: Poconé, Pirizal (16 ° 16 ’ S, 56 ° 22 ’ W), 29 / 02 / 2004, J. L. Silva col., 1 ♀ (PD G 981). São Paulo: Bananal (22 ° 41 ’ 01 ” S, 44 ° 19 ’ 24 ” W), 2010, J. M. Pereira col., 3 ♀, 1 ♂ (IBSP 3655); Caucaia do Alto, Reserva Morro Alto (23 ° 41 ’ S, 47 ° 1 ’ W), 07 / 2016, V. C. Calvanese col., 2 ♀, 1 ♂ (IBSP 4065); Iporanga, Parque Estadual do Alto do Ribeira (PETAR) (24 ° 35 ’ 08 ” S, 48 ° 35 ’ 35 ” W), 2010, J. M. Pereira col., 3 ♀, 2 ♂ (IBSP 3657); Paraná, Sangés (24 ° 06 ’ 46 ” S, 49 ° 27 ’ 49 ” W), 5 ♀ (IBSP 878).