Gamasiphis salvadori, 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 : 1971-1976

publication ID	https://doi.org/ 10.1080/00222933.2012.700336
persistent identifier	https://treatment.plazi.org/id/DB5187E7-A355-FFBF-FA1E-1A3FFE92D5E4
treatment provided by	Felipe
scientific name	Gamasiphis salvadori
status	sp. nov.

Treatment

Gamasiphis salvadori 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 post-anal) slightly expanded distally; seta j2 posterior and slightly laterad to j1; seta j4 about as long as distance between its base and base of j5; seta z6 about as long as j6; seta s6 about 0.2 times as long as j6; seta j6 about 0.9 times as long as distance between its base and base of J3; three 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 (Jv1–Jv5, Zv1–Zv3); seta Zv2 about 0.8 times as long as distance between its base and base of Zv3.

Adult female ( Figure 1A–F View Figure 1 )

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 67 (63–67) long, with six teeth in addition to apical tooth and a setiform pilus dentilis ( Figure 1A View Figure 1 ); movable cheliceral digit 66 (65–68) 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; with two denticles between anteromedial and each anterolateral extension ( Figure 1B View Figure 1 ). Margins of deutosternum not distinct; deutosternal denticles in eight rows, with 7–13 denticles each ( Figure 1C View Figure 1 ); anteriormost row shaped as an inverted “V” while subsequent rows are roughly transverse. Seta h3 posteromediad to h1 and slightly anterior and mediad to h2. Measurements of setae: h1 35 (34–36), h2 30 (30–31), h3 40 (39–41), sc 32 (31–33).

Dorsal idiosoma ( Figure 1D View Figure 1 ). Idiosoma 569 (542–598) long and 506 (464–551) wide at widest point; dorsal shield smooth. Podonotal region with 22 pairs of setae (s1 and r1 absent) and nine pairs of distinguishable lyrifissures; seta j2 posterior and slightly laterad to j1; seta j4 about as long as distance between its base and base of j5; seta j6 about 0.9 times as long as distance between its base and base of J3. Opisthonotal region with 12 pairs of setae (J1, J2, S5 and R1–R5 absent) and eight pairs of distinguishable lyrifissures. Measurements of setae: j1 14 (13–17), j2 44 (42–49), j3 56 (54–58), j4 67 (66–67), j5 53 (52–55), j6 91 (89–92), z1 9 (8–11), z2 12 (11–12), z3 12 (11–12), z4 66 (65–67), z5 74 (73–76), z6 99 (96–101), s2 61 (59–63), s3 14 (13–16), s4 75 (74–76), s5 81 (80–83), s6 15 (14–16), r2 22 (21–23), r3 19 (19–20), r4 14 (13–14), r5 30 (29–32), r6 15 (15–16), J3 8 (7–8), J4 8 (7–8), J5 11 (10–11), Z1 11 (10–11), Z2 8 (7–8), Z3 11 (10–11), Z4 7 (6–7), Z5 115 (113–117), S1 7 (7–8), S2 7 (7–8), S3 8 (7–8), S4 8.

Ventral idiosoma ( Figure 1E View Figure 1 ). Base of tritosternum 22 (21–23) long and 16 (15–17) wide proximally ( Figure 1F View Figure 1 ); laciniae 89 (87–92), separated for about 95% of their total length, pilose. With two pairs of presternal shields. Sternal shield reticulate between st1 and st2, smooth posteriorly; approximately 80 (79–82) long at mid-line and 177 (173–182) wide between tips of endopodal projection 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 65 (63–67). Ventrianal shield transversely striate anteriorly to Zv2 and smooth posteriorly; 279 (261–297) long at mid-line (from anterior margin to post-anal seta), 278 (265–286) 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 about 0.8 times 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 S2; seta Jv5 about level with posterior margin of anal opening and about four times as long as para-anal seta; post-anal seta about five 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 and bears a lyrifissure. Peritreme extending anteriorly to mid-level of coxa I. Measurements of setae: st1 39 (37–41), st2 34 (33–35), st3 27 (26–28), st4 30 (29–30), st5 21 (20–22), Jv1 29 (28–30), Jv2 24 (23–24), Jv3 23 (23–24), Jv4 36 (35–37), Jv5 87 (83–91), Zv1 30 (29–31), Zv2 35 (33–36), Zv3 30 (29–32), para-anal 21 (21–22), post-anal 102 (97–107). Legs. Lengths: I: 451 (421–495); II: 400 (376–441); III: 386 (367–421); IV: 523 (502–561). 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 2A–C View Figure 2 )

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 2A View Figure 2 ).

Gnathosoma . Fixed cheliceral digit 53 (51–54) long, with seven teeth in addition to apical tooth ( Figure 2B View Figure 2 ); pilus dentilis not distinguishable; movable cheliceral digit 52 (49–53) long, with one tooth in addition to apical tooth. Antiaxial lyrifissure not distinct, but dorsal cheliceral seta distinct. Spermatodactyl 68 (66–71) long, c-shaped, 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 33 (32–34), h2 28 (28–29), h3 35 (35–36), sc 30 (29–32).

Dorsal idiosoma. Idiosoma 458 (443–475) long and 369 (352–381) wide at widest point; dorsal shield similar to that of adult female. Measurements of setae: j1 11 (11–12), j2 43 (41–46), j3 40 (39–41), j4 65 (63–66), j5 45 (44–47), j6 84 (78–90), z1 7 (7–8), z2 11 (10–12), z3 11 (11–12), z4 62 (60–64), z5 69 (67–71), z6 89 (86–92), s2 55 (53–57), s3 11 (11–12), s4 69 (67–71), s5 76 (74–78), s6 13 (12–14), r2 16 (15–18), r3 15 (14–16), r4 9 (8–11), r5 23 (22–25), r6 13 (12–13), J3 7 (6–7), J4 7 (6–8), J5 8 (7–9), Z1 9 (9–10), Z2 7 (7–8), Z3 11 (11–12), Z4 6 (6–7), Z5 97 (93–101), S1 7 (6–7), S2 7 (7–8), S3 8 (7–8), S4 8 (7–8).

Ventral idiosoma ( Figure 2C View Figure 2 ). Base of tritosternum 20 (18–21) long and 13 (12–15) wide proximally; laciniae 67 (61–78), 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 154 (152–156) long and 155 (150–161) 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 220 (209–228) long at mid-line (from anterior margin to post-anal seta) and 241 (237–246) 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 anterior margin of anal opening and about four times as long as para-anal seta; postanal seta about 4.5 to five times as long as para-anal seta. Measurements of setae: st1 29 (29–30), st2 31 (30–31), st3 25 (24–26), st4 28 (27–29), st5 29 (28–31), Jv1 28 (26–30), Jv2 23 (22–24), Jv3 21 (21–22), Jv4 32 (30–33), Jv5 80 (76–85), Zv1 27 (26–28), Zv2 32 (31–33), Zv3 26 (25–28), para-anal 19 (18–19), post-anal 95 (88–101).

Legs. Lengths: I: 437 (413–458); II: 367 (346–389); III: 361 (341–382); IV: 521 (512–537). 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 collected on 7 October 2008; three adult male paratypes collected on 15 June 2009; three adult female paratypes and three adult male paratypes collected on 7 September 2009; three adult female paratypes collected on 12 September 2011; three adult female paratypes and three adult male paratypes collected on 14 October 2011. All types deposited at Departamento de Entomologia e Acarologia, ESALQ / USP .

Etymology

The name salvadori is a posthumous tribute to Salvador de Toledo Piza Junior, eminent former Professor of ESALQ / USP.

Remarks

Gamasiphis salvadori View in CoL sp. nov. is most similar to Gamasiphis hamatellus Karg, 1998 View in CoL , but the latter has 17 pairs of setae on the podonotal region (z2, s1, and r1–r5 absent); seta j4 about 0.8 times as long as distance between its base and base of j5; seta z6 about 0.2 times as long as j6; seta s6 as long as j6 and 10 pairs of setae on the opisthonotal region (J1, J2, S1, S2, S5 and R1–R5 absent). It is also similar to Gamasiphis silvestris Karg, 2007 View in CoL , but the latter has 11 pairs of setae on the podonotal region; six pairs of setae on the opisthonotal region; opisthonotal region with two pairs of setae (Z2 and Z5) much longer than others and ventrianal shield imbricate anteriorly to Jv3 and smooth elsewhere.