Pseudoscirus amazonae Wurlitzer and Rocha, 2021

Wurlitzer, Wesley Borges, Franklin, Elizabeth, Ferla, Noeli Juarez, da Silva, Guilherme Liberato & dos Santos Rocha, Matheus, 2021, Pseudoscirus gen. nov. of Coleoscirinae (Acari: Prostigmata: Cunaxidae) from the Amazon rainforest, Brazil, with a key to the genera of adult female Coleoscirinae, Journal of Natural History 55 (25 - 26), pp. 1639-1647 : 1641-1646

publication ID

https://doi.org/ 10.1080/00222933.2021.1949504

publication LSID

lsid:zoobank.org:pub:C45C0CF6-CEAB-4AF1-995F-FDCDB2062C3F

persistent identifier

https://treatment.plazi.org/id/5904805E-FFB6-D561-FEB9-3990929FDF92

treatment provided by

Plazi

scientific name

Pseudoscirus amazonae Wurlitzer and Rocha
status

sp. nov.

Pseudoscirus amazonae Wurlitzer and Rocha sp. nov.

Description

Female (n = 4). Idiosoma length 517 (500–541) and width 288 (274–306); shield length 203 (192–211) and width 158 (146–172). Dorsum ( Figure 1 View Figure 1 (a)). Dorsum is covered by small and ill-defined propodosomal shield (with a notch); surface finely granulate bearing the propodosomal setae lps, mps and sensilla (at and pt) and with a row of about eight subcuticular cells anterior to posterior sensillum. Hysterosoma without hysterosomal shield. Simple tactile setae c1, c2, d1, e1, f1, f2, h1 and h2 on minute sclerotised plates. Cupule im present in the integument. Integument striated and finely granulate. Anal region with ps1. The length of the setae is as follows: at 130 (95–154), pt 154 (136–162), lps 47 (36–52), mps 31 (36–45), c1 31 (28–33), c2 37 (29–43), d1 36 (34–37), e1 35 (33–36), f1 38 (31–46), f2 19 (16–21), h1 37 (35–40) and h2 27 (16–53). Distance between setae: at–at 75 (71–77), at–lps 54 (48–59), lps–lps 113 (107–117), pt–pt 147 (133–155), pt–mps 24 (23– 26), mps–mps 110 (96–118), mps–c1 77 (71–93), c1–c1 75 (65–81), d1–d1 95 (81–112), e1–e1 57 (55–58), f1–f1 45 (39–53), f2–f2 71 (6879–), h1–h1 34 (32–36) and h2–h2 70 (53–83).

Venter ( Figure 1 View Figure 1 (b)). Integument of venter finely striated-granulated. Coxal plates I–II of each side completely fused medially as a sternal shield; surface finely granulate; posterior lobe of shield broadly rounded, with one pair of propodogastral setae present. Coxal plates III–IV rather large, extending medially to almost meet the lateral margins of the sternal shield. Five pairs of hysterogastral setae and one pair of aggenital setae present on the integument. Genital valves finely granulate, bearing four pairs of genital setae (g1–g4) and two pairs of suckers. Cupule ih present on the integument. Anal region with ps2. Length of genital setae: g1 24 (21–28), g2 30 (24–35), g3 38 (35–39) and g4 27 (20–33).

Gnathosoma ( Figure 2 View Figure 2 (a,b)). Chelicera ( Figure 2 View Figure 2 (a)) length 211 (204–217) and length of cheliceral setae 13 (12–15). Subcapitulum ( Figure 2 View Figure 2 (b)) with ventral surface finely striatedgranulated; four pairs of setae hg1–hg4 and two pairs of adoral setae present. Length of hypognathal setae hg1 22 (20–23), hg2 22 (20–24), hg3 22 (19–25) and hg4 44 (31–52). Palp ( Figure 2 View Figure 2 (b)) length 246 (234–265), five-segmented. Chaetotaxy: trochanter without setae; basifemur with one spls; telofemur with one spls; genua with four sts; tibiotarsus one long ventral simple tactile seta, one ventral tubercle, one median, one lateral and two dorsal simple tactile setae, and a terminal claw.

Legs ( Figure 3 View Figure 3 (a–e)). Leg I 461 (424–500); leg II 425 (387–449); leg III 448 (441–457); leg IV 475 (457–487). Chaetotaxy: coxae ( Figure 1 View Figure 1 (b)) I–IV, 1 peg, 3-3-3-3 sts; trochanters I–IV, 1-1-2-1 sts; basifemora I–IV, 5-6-5-2 sts; telofemora I–IV, 5-5-4-3 sts; genua I with 4 ats, 5 sts; genua II with 3 ats, 5 sts; genua III with 2 ats, 5 sts; genua IV with 2 ats, 5 st s; tibiae I with 2 bsl, 5 sts; tibiae II with 1 bsl, 5 sts; tibiae III with 1 bsl, 5 sts; tibiae IV with 1 T, 4 sts; tarsi I with 4 ats, 1 fam, 1 dtsl, 2 tsl, 18 sts; tarsi II with 1 bsl, 1 dtsl, 2 tsl, 21 sts; tarsi III with 1 tsl, 19 sts; tarsi IV with 18 sts. Ambulacral claws rippled ( Figure 3 View Figure 3 (e)).

Remarks. This species can be distinguished from P. intermedius by possessing the basifemora II with 6 sts; propodosomal shield with a notch and by the simple tactile setae c1, c2, d1, e1, f1, f2, h1 and h2 on minute sclerotised plates (basifemora II with 5 sts; propodosomal shield convex and simple tactile setae c1, c2, d1, e1, f1, f2, h1 and h2 on tegument on P. intermedius ).

Male and developmental stages. Unknown.

Etymology. The new species’ name refers to the Amazonic biome where the holotype was collected.

Type material. The holotype female and three paratypes (females) were collected by Elizabeth Franklin on a fallen tree trunk, in a Campina reserve (‘ Reserva Biologica da Campina’), north of Manaus City, at km 62 of BR-174 (2°55 ʹ 54.7”S, 60°01 ʹ 47.1”W), Amazonas State, Brazil, on 6 July 2018 GoogleMaps . The holotype is deposited in the Departament de Acarology and Entomology of Escola Superior de Agricultura ‘ Luiz de Queiroz’, Universidade de São Paulo ( ESALQ / USP), Piracicaba, São Paulo State, Brazil . Two paratypes are deposited in the National Institute of Amazonian Research ( INPA), Manaus, Brazil . One paratype is deposited in the Natural Science Museum of University of Vale do Taquari- Univates, Lajeado, Rio Grande do Sul State, Brazil .

Key to genera of adult female Coleoscirinae (modified from Skvarla 2014)

1 Idiosomal plates well developed and defined; hysterosomal shield present and fused to proterosomal plate ( Figure 4 View Figures 4–6 (a,b)) .................................................................................................................... 2 - Idiosomal plates poorly developed and sometimes ill defined; hysterosomal plate absent ( Figure 4 View Figures 4–6 (c,d)) .................................................................................................................................. 3

2 (1) Idiosoma with 15 to 19 plates, including 4 pairs of dorsolateral plates; 2 dorsal plates; pedipalp tibiotarsal ventral tubercle bifurcate (except in S. contiguous , S. pigrus and S. exasperates ( Figure 6 View Figures 4–6 (c)) ............................................................................ Scutascirus Den Heyer, 1976 - Idiosoma with no more than 8 plates; dorsolateral plates absent ( Figure 4 View Figures 4–6 (b)); females with only 1 dorsal plate; males with up to 3 dorsal plates; pedipalp tibiotarsal ventral tubercle plain, and not bifurcate ( Figure 6 View Figures 4–6 (d)) .............................. Coleoscirus Berlese, 1916

3 (1) Females with coxae I–II fused medially into a sternal shield ( Figure 5 View Figures 4–6 (b)); apices of some solenidia on tarsi I swollen ...................... Pseudoscirus Wurlitzer and Rocha gen. nov. - Coxae I–II usually not fused medially and restricted to trochantral bases ( Figure 5 View Figures 4–6 (c,d)); solenidia on tarsi I usually cylindrical .............................................................................................................. 4

4 (3) Pedipalp tibiotarsus short and nearly cone-like ( Fig. 6a View Figures 4–6 ); cheliceral trochanters broad; ambulacral claws smooth .......................................................................... Neoscirula Den Heyer, 1977 - Pedipalp tibiotarsus long, narrow and S-shaped ( Figure 6 View Figures 4–6 (b)); cheliceral trochanters narrow; ambulacral claws rippled .......................................................................................................... 5

5 (4) Subcuticular reticulated pattern present on proterosomal, coxal and genital plates: ( Figure 5 View Figures 4–6 (c)) ............................................... ............................................... Pseudobonzia Smiley, 1975 - Subcuticular reticulated pattern absent or restricted to the edge of coxae ( Figure 5 View Figures 4–6 (d))... ..................................................................................................................................... Neobonzia Smiley, 1992

USP

University of the South Pacific

INPA

Instituto Nacional de Pesquisas da Amazonia

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