Gamasiphis flechtmanni, Castilho & Narita & de Moraes, 2012

Castilho, Raphael C., Narita, João Paulo Z. & de Moraes, Gilberto J., 2012, Three new species of Gamasiphis (Acari: Mesostigmata: Ologamasidae) from Brazil, with complementary information about Gamasiphis plenosetosus Karg and a key to the world species of the genus, Journal of Natural History 46 (31 - 32), pp. 1969-1998 : 1976-1980

publication ID	https://doi.org/ 10.1080/00222933.2012.700336
persistent identifier	https://treatment.plazi.org/id/DB5187E7-A358-FFBB-F9CC-1CE4FF2ED106
treatment provided by	Felipe
scientific name	Gamasiphis flechtmanni
status	sp. nov.

Treatment

Gamasiphis flechtmanni View in CoL sp. nov.

Diagnosis of adults

Anteromedial extension of epistome aciculate; longer idiosomal setae (j2–j6, z4–z6, s2, s4, s5, Z5, Jv5 and postanal) slightly expanded distally; seta j2 laterad to j1; seta j4 as long as distance between its base and base of j5; seta z6 about as long as j6; seta s6 about 0.3 times as long as j6; seta j6 about 0.6 times as long as distance between its base and base of J2; four pairs of J setae; two pairs of presternal shields; sternal shield with four pairs of lyrifissures; ventrianal shield with eight pairs of setae in addition to circumanal setae; seta Zv2 as long as distance between its base and base of Zv3.

Adult female ( Figure 3A–F View Figure 3 )

Five specimens measured. Setae j2–j6, z4–z6, s2, s4, s5, Z5, Jv5 and postanal slightly expanded distally; other setae aciculate.

Gnathosoma . Fixed cheliceral digit 60 (58–62) long, with seven teeth in addition to apical tooth and a setiform pilus dentilis ( Figure 3A View Figure 3 ); movable cheliceral digit 59 (57–61) long, with four teeth in addition to apical tooth. Antiaxial lyrifissure and dorsal cheliceral seta distinct. Anteromedial extension of epistome smooth and aciculate; anterolateral extensions smooth, aciculate and shorter than anteromedial extension ( Figure 3B View Figure 3 ). Margins of deutosternum not distinct; deutosternal denticles in eight rows, with 7–14 denticles each ( Figure 3C View Figure 3 ); anteriormost row shaped as an inverted “V” and subsequent rows roughly transverse. Seta h3 posterior and about in longitudinal line with or slightly laterad to h1, and anterior and mediad to h2. Measurements of setae: h1 31 (30–32), h2 21 (20–22), h3 31 (30–32), sc 27 (26–28).

Dorsal idiosoma ( Figure 3D View Figure 3 ). Idiosoma 438 (427–449) long and 326 (304–347) wide at widest point; dorsal shield smooth. Podonotal region with 21 pairs of setae (s1, r1 and r2 absent), seven pairs of distinguishable lyrifissures and a pair of pores, the latter anterolaterad to z5; seta j2 laterad to j1; seta j4 as long as distance between its base and base of j5; seta j6 about 0.6 times as long as distance between its base and base of J2. Opisthonotal region with 14 pairs of setae (J1 and R1–R5 absent), eight pairs of distinguishable lyrifissures and a pair of pores, the latter anteromediad to S2. Measurements of setae: j1 11 (10–11), j2 37 (36–38), j3 41 (41–42), j4 49 (47–52), j5 35 (33–37), j6 40 (37–43), z1 7 (6–8), z2 8 (7–8), z3 7 (6–7), z4 41 (39–43), z5 41 (40–43), z6 46 (45–47), s2 42 (41–43), s3 15 (14–16), s4 46 (45–47), s5 44 (40–47), s6 12 (11–12), r3 8 (8–9), r4 6 (5–6), r5 15 (15–16), r6 7 (7–8), J2 12 (11–13), J3 11 (10–11), J4 14 (13–14), J5 11 (11–12), Z1 15 (14–15), Z2 12 (11–12), Z3 11 (11–12), Z4 11 (10–11), Z5 74 (73–75), S1 13 (12–14), S2 11 (10–11), S3 12 (12–13), S4 12 (11–12), S5 11 (11–12).

Ventral idiosoma ( Figure 3E View Figure 3 ). Base of tritosternum 20 (18–21) long and 14 (14–15) wide proximally ( Figure 3F View Figure 3 ); laciniae 79 (75–84), separated for about 90% of their total length, pilose. With two pairs of presternal shields. Sternal shield reticulate between st1 and st2, smooth posteriorly; approximately 65 (61–68) long at mid-line and 139 (138–139) wide between tips of endopodal projections between coxae II and III; with four pairs of setae, st3 inserted slightly posterior and mediad to st2, and four pairs of lyrifissures. Genital shield smooth; sclerotized section shorter than width along straight posterior margin, which is about in line with posterior margin of coxa IV; distance between st5–st5 54 (51–56). Ventrianal shield transversely striate anteriorly to Zv2 and smooth posteriorly; 220 (219–224) long at mid-line (from anterior margin to postanal seta), 230 (227–234) wide at widest point; with eight pairs of setae (Jv1–Jv5, Zv1–Zv3) in addition to circumanal setae and three pairs of lyrifissures; seta Zv2 as long as distance between its base and base of Zv3; anal region of the shield partially separated from ventral region by an unsclerotized line (except for area between Jv3 and slightly laterad to it) that runs ventrolaterally forward to the region next to S3; seta Jv5 about slightly anterior to anterior margin of anal opening and about three to four times as long as para-anal seta; postanal seta about four times as long as para-anal seta. A narrow band of dorsal shield extending laterad and up to the posterior end of the fused peritrematic–exopodal shield. A narrow diagonal section of sclerotized cuticle laterad to ventrianal shield connects the latter to the dorsal shield. Peritreme extending anteriorly to posterior margin of coxa I. Measurements of setae: st1 28 (27–29), st2 27 (26–27), st3 19 (18–20), st4 22 (21–22), st5 22 (21–23), Jv1 29 (27–30), Jv2 30 (28–31), Jv3 25 (24–26), Jv4 39 (37–41), Jv5 62 (61–64), Zv1 30 (29–31), Zv2 36 (34–37), Zv3 26 (24–27), para-anal 17 (16–19), postanal 72 (71–73).

Legs. Lengths: I: 406 (394–427); II: 333 (311–341); III: 293 (279–301); IV: 394 (388–406). Numbers of setae on segments of legs I–IV: coxa: 2, 2, 2, 1; trochanter: 6, 5, 5, 5; femur: 13, 11, 6, 6; genu: 13, 11, 9, 8; tibia: 14, 10, 8, 9; tarsus II–IV: 18, 18, 17. All legs with pretarsi, each with three rounded pulvillar lobes, elongate ambulacral stalk and a pair of strongly sclerotized claws.

Adult male ( Figure 4A–C View Figure 4 )

Five specimens measured. Shape of setae as in adult female, except for two ventral setae on each of femur II and genu II and one ventral seta on tibia II, spur-like ( Figure 4A View Figure 4 ).

Gnathosoma . Fixed cheliceral digit 48 (46–51) long, with seven teeth in addition to apical tooth ( Figure 4B View Figure 4 ); pilus dentilis not distinguishable; movable cheliceral digit 47 (45–50) long, with one tooth in addition to apical tooth. Antiaxial lyrifissure not distinct, but dorsal cheliceral seta distinct. Spermatodactyl 59 (57–62) long, sigmoid, apparently with an internal canal in proximal half and with distal half spatulated. Epistome, deutosternum and position of hypostomal setae as in adult female. Measurements of setae: h1 30 (29–30), h2 19 (18–20), h3 31 (30–32), sc 27 (26–27).

Dorsal idiosoma. Idiosoma 406 (386–421) long and 305 (295–317) wide at widest point; dorsal shield similar to that of adult female. Measurements of setae: j1 10 (9–10), j2 35 (35–36), j3 42 (41–43), j4 48 (47–50), j5 35 (34–37), j6 36 (35–38), z1 7 (7–8), z2 8 (7–8), z3 8 (7–8), z4 39 (38–41), z5 40 (39–41), z6 45 (44–46), s2 39 (37–40), s3 13 (12–13), s4 43 (42–44), s5 47 (45–48), s6 10 (10–11), r3 7 (7–8), r4 7 (7–8), r5 11 (11–12), r6 7 (7–8), J2 11 (11–12), J3 11 (10–12), J4 11 (10–11), J5 11 (10–12), Z1 11 (11–12), Z2 9 (9–10), Z3 9 (9–10), Z4 9 (9–10), Z5 71 (69–73), S1 10 (10–11), S2 10 (9–11), S3 11 (10–12), S4 10 (10–11), S5 10 (10–11).

Ventral idiosoma ( Figure 4C View Figure 4 ). Base of tritosternum 15 (15–16) long and 12 (12–13) wide proximally; laciniae 62 (59–65), other characteristics as in adult female. Except for the fusion of sternal and genital shields (sternogenital shield), shape, pattern and fusions of ventral shields as in adult female. With two pairs of presternal shields. Sternogenital shield reticulate between st1 and st2, smooth posteriorly; approximately 123 (117–127) long and 132 (128–135) wide between tips of endopodal projections between coxae II and III; posterior margin slightly concave; with five pairs of setae and four pairs of lyrifissures; genital opening on anterior margin of shield. Ventrianal shield 207 (201–216) long at mid-line (from anterior margin to postanal seta) and 216 (207–225) wide at widest point, with eight pairs of setae (Jv1–Jv5, Zv1–Zv3) in addition to circumanal setae and three pairs of lyrifissures; seta Jv5 about level with posterior margin of anal opening and about three to four times as long as para-anal seta; postanal seta about four to five times as long as para-anal seta. Measurements of setae: st1 27 (27–28), st2 29 (29–30), st3 23 (21–25), st4 27 (26–28), st5 25 (23–27), Jv1 30 (29–30), Jv2 25 (24–27), Jv3 26 (25–26), Jv4 34 (33–36), Jv5 55 (53–57), Zv1 30 (30–31), Zv2 34 (33–35), Zv3 24 (23–26), para-anal 15 (14–16), postanal 70 (68–72).

Legs. Lengths: I: 388 (374–402); II: 331 (323–337); III: 302 (296–308); IV: 403 (397–410). Numbers of setae of leg segments similar to those of adult female. All legs with pretarsi, similar to those of adult female.

Material examined

All specimens collected by J.P.Z. Narita from soil and litter of a garden by “Salvador de Toledo Piza Junior” building, campus of Escola Superior de Agricultura “Luiz de Queiroz” ( ESALQ), Universidade de São Paulo ( USP), Piracicaba, São Paulo State, Brazil (22 ◦ 42 ′ 30 ′′ S, 47 ◦ 38 ′ 00 ′′ W). Adult female holotype, one adult female paratype and two adult male paratypes collected on 14 October 2011 ; one adult female paratype and one adult male paratype collected on 15 July 2011; two adult female paratypes and three adult male paratypes collected on 21 August 2011. All types deposited at Departamento de Entomologia e Acarologia, ESALQ / USP .

Etymology

The name flechtmanni is in honour of Professor Carlos Holger Wenzel Flechtmann of ESALQ / USP, for all his help during the Master’s degree and doctorate of the firstnamed author of this work.

Remarks

Gamasiphis flechtmanni View in CoL sp. nov. is most similar to Gamasiphis lanceolatus Karg, 1987 View in CoL , but the latter has 22 pairs of setae on the podonotal region (s1 and r1 absent); seta j2 posterior to j1; seta j4 about 1.2 times as long as distance between its base and base of j5; opisthonotal region with 13 pairs of setae (J1, S5 and R1–R5 absent) and peritreme extending anteriorly beyond coxa I. It is also similar to Gamasiphis salvadori View in CoL sp. nov. but the latter has 22 pairs of setae on the podonotal region (s1 and r1 absent); seta j2 posterior to j1; 12 pairs of setae on the opisthonotal region (J1, J2, S5 and R1–R5 absent) and seta Zv2 about 0.8 times as long as distance between its base and base of Zv3.