Protogamasellus sigillophorus Mineiro, Lindquist & Moraes 2009
Creators: name: Yamada, Mariana
name: De Moraes, Gilberto J.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Mesostigmata
Ascidae
Protogamasellus
Protogamasellus sigillophorus

description: Protogamasellus sigillophorus Mineiro, Lindquist & Moraes, 2009
Protogamasellus sigillophorus Mineiro, Lindquist & Moraes, 2009: 26; Moraes et al., 2016: 126.
Morphology (females, five specimens measured).
Gnathosoma. Fixed cheliceral digit 33 (33–36) long, with 11–13 teeth, a large offset subapical tooth and setiform pilus dentilis. Movable digit 35 (32–37), with two teeth; epistome anteriorly subtriangular, with serrate margin. Deutosternum with a smooth transverse line, followed by six transverse lines with 1–4 denticles each. Corniculi stout, spine-like, subparallel to each other.
Dorsal idiosoma. Idiosoma 288 (279–303) long and 132 (129–134) wide at level of r 3. Podonotal shield with a continous transverse line at level of z 6; without scleronoduli; 140 (134–146) long and 100 (96–104) wide at level of j 5; with 17 pairs of setae, four pairs of poroids and a pair of solenostomes setae j 2 transversely aligned with j 1 and z 1.Unsclerotised lateral cuticle with five pairs of setae (s 2, r 2– r 5). Opisthonotal shield with a continuous transverse line at level of J 1; 145 (140–150) long and 65 (63–67) wide at level of J 2; with 15 pairs of setae, six pairs of poroids and two pairs of solenostomes. Unsclerotised lateral cuticle with seven pairs of setae (R 1 – R 6 and UR). Setal lengths: j 1 25 (23–27), j 2 11 (10–11), j 3 11 (10–11), j 4 13 (12–13), j 5 11 (10–12), j 6 13 (11–15), J 1 12 (13–11), J 2 13 (11–15), J 3 14 (13–14), J 4 13 (12–14), J 5 10 (9–11), z 1 11 (10–11), z 2 12 (10–13), z 3 14 (12–15), z 4 13 (12–14), z 5 15 (14–16), z 6 17 (16–18), Z 1 17 (14–19), Z 2 17 (16–18), Z 3 19 (17–20), Z 4 19 (18–22), Z 5 30 (29–30), s 1 12 (10–13), s 2 13 (11–14), s 3 11 (10–11), s 4 15 (14–15), s 5 16 (14–17), s 6 18 (17–19), S 1 14 (13–14), S 2 13 (11–14), S 3 12 (11–13), S 4 15 (13–17), S 5 15 (14–16), r 2 15 (13–17), r 3 15 (14–16), r 4 13 (11–14), r 5 10 (9–11), R 1 9 (7–10), R 2 11 (9–12), R 3 10 (8–11), R 4 10 (8–11), R 5 11 (10–12), UR 9 (8–10); setae aciculate and smooth, except J 4, Z 5 and S 5, sparsely barbed.
Ventral idiosoma. Base of tritosternum 26 (24–27) long and 8 (7–9) wide proximally; laciniae 51 (50–52), separated for about 80% of their total length, pilose. Pre-sternal area punctate, pre-sternal platelets absent. Sternal shield smooth, with anterior margin deeply emarginated; 76 (74–78) long and 65 (64–66) wide at level of st 2; with three pairs of simple setae and three pairs of poroids; distances st 1– st 3 56 (53–58), st 2– st 2 42 (39–44). Metasternal plates indistinguishable, fourth pair of sternal setae (st 4) on unsclerotised cuticle. Genital shield smooth, bearing st 5, with posterior margin truncate; 59 (53–64) long and 23 (19–26) wide at widest level; distance st 5– st 5 23 (21–24); poroids iv 5 on unsclerotised cuticle. With two pairs of rounded metapodal platelets. Ventrianal shield with anterior margin arched, with 2–3 transverse and arched lines between Jv 2 and anal opening; 92 (87–97) long and 71 (68–73) wide at widest level; with three pairs of setae (Jv 2, Jv 3 and Jv 5) in addition to circumanals; Jv 1, Jv 4 and Zv 1on unsclerotised cuticle; para-anal inserted at level of anterior anal margin; anal opening 15 (14–16) long. Endopodal plates represented by lightly sclerotised strips alongside coxae III–IV. Exopodal plates reduced to triangular plates between the coxae II–III and III–IV. Setal lengths: st 1 14 (12–15), st 2 16 (14–17), st 3 16 (15–17), st 4 13 (11–14), st 5 11 (10–12), Jv 1 9 (8–10), Jv 2 13 (11–14), Jv 3 9 (7–11), Jv 4 9 (7–10), Jv 5 20 (19–21), Zv 1 11 (10–12), para-anal 15 (14–16), post-anal 30 (29–31); setae aciculate and smooth, except Jv 5 and post-anal, sparsely barbed.
Peritreme and peritrematic plate. Peritreme short, extending anteriorly to level of r 3; petritrematic plate narrow posteriorly.
Spermathecal apparatus. Indistinct.
Legs. Lengths of legs (not including pretarsus): I: 272 (267–276); II: 165 (162–167); III: 137 (134–139); IV: 206 (202–210). Setation (legs I IV): coxae: 2, 2, 2, 1; trochanters: 1 0/1, 1/2 1; 1 0/1, 0/2 1; 1 0/1, 0/2 1; 1 0/1, 0/2 1; femora: 2 3/1, 2/2 2; 2 3/1, 2/2, 1; 1 2/1, 1/0 1; 1 2/1, 1/0 1; genua: 2 3/2, 3/1 2; 2 3/1, 2/1 2; 2 2/1, 2/0 1; 2 2/1, 3/0 0; tibiae: 2 3/2, 3/1 2; 2 2/1, 2/1 2; 2 1/1, 2/1 1; 2 1/1, 3/1 1; tarsi: I: not counted, 18, 18, 18. All legs with pretarsus containing claws and pulvillus.
Adult male. Not found.
Material examined. Five females from soil of natural vegetation of the Pantanal, on September 2018; two females from the same substrate, on March 2019; 50 females from soil of soybean field, on September 2018; 36 females from soil of corn field, on March 2019; 44 females from soil of sorghum field, on March 2019; two females from pasture soil, on September 2018; two females from the same substrate, on March 2019; two females from the same substrate, on June 2019.
Remarks. The specimens collected agree well with the original description of the species.
description: Published as part of Yamada, Mariana & De Moraes, Gilberto J., 2020, A key to the species of Protogamasellus (Acari: Ascidae), with a new species from the Brazilian Pantanal, pp. 343-354 in Zootaxa 4801 (2) on pages 346-347, DOI: 10.11646/zootaxa.4801.2.8, http://zenodo.org/record/3900519