Eryngiopus moraesi Paktinat-Saeij & Barroso

Paktinat-Saeij, Saeid, Barroso, Geovanny & Cruz, Wilton Pires Da, 2017, Two new species of Stigmaeidae (Acari: Trombidiformes: Rhaphignathoidea) from Brazil, Zootaxa 4242 (2), pp. 372-382: 376-378

publication ID

https://doi.org/10.11646/zootaxa.4242.2.9

publication LSID

lsid:zoobank.org:pub:7312498B-EC54-4580-9D5E-472D34F4BAC3

persistent identifier

http://treatment.plazi.org/id/224787F8-325C-FFBE-FF28-FF43FCB84972

treatment provided by

Plazi

scientific name

Eryngiopus moraesi Paktinat-Saeij & Barroso
status

sp. nov.

Eryngiopus moraesi Paktinat-Saeij & Barroso  sp. nov.

( Figs. 9–25View FIGURES 9 – 15View FIGURES 16 – 19View FIGURES 20 – 25, 28–29View FIGURES 28 – 29)

Diagnosis. Propodosomal shield finely striated; prodorsum with three pairs of setae, setae sce absent; suranal shield divided; dorsal setae slender and finely barbed. Aggenital shield divided by striae, ag 1 and ag 2 –ag 3 on separate platelets; seta g 1 not reaching base of ps 3. Femora I – II 4-4; genua I – II 3 (+1κ)-1; tarsi I – IV 12 (+1ω)- 8(+1ω)-6(+1ω)-6(+1ω).

Description. Female (n = 2): Length of idiosoma 271 (281); width of idiosoma 152 (154); gnathosoma (including palp) 90 (88); subcapitulum 55 (58); palp 59 (60); chelicera 60 (75). Length of legs I –IV (from base of coxa to tip of tarsal claw): 130 (137); 106 (110); 105 (111); 110 (117).

Dorsum of idiosoma ( Figs. 9 – 10View FIGURES 9 – 15, 28 – 29View FIGURES 28 – 29). Idiosoma oval in dorso-ventral view; longitudinally striated. Propodosomal shield finely striated and reduced to one small weakly sclerotized shield, setae vi and ve on shield; setae sci on striated cuticle; setae sce absent; one pair of eyes present, pob absent ( Figs. 9View FIGURES 9 – 15, 28View FIGURES 28 – 29). Setae c 1, d 1, e 1, c 2, d 2 and e 2 on striated cuticle. Intercalary shield divided into two minute platelets with one pair of seta f 1. Suranal shield smooth, divided, with two pairs of setae (h 1 and h 2). Dorsal setae slender and finely barbed. Lengths of dorsal setae: vi 8 (10); ve 14 (15); sci 13 (14); c 1 11 (13); c 2 15 (17); d 1 10 (11); d 2 10 (11); e 1 10 (11); e 2 10 (11); f 1 14 (15); h 1 16 (20); h 2 19 (20). Distances between dorsal setae: vi – vi 11 (9); ve –ve 32 (31); vi –ve 15 (17); ve –sci 29 (27); sci –sci 79 (68); c 1 –c 1 56 (44); c 1 –d 1 60 (68); c 1 –c 2 50 (45); c 2 –c 2 127 (119); c 2 –d 2 71 (70); d 1 –d 1 67 (54); d 1 –d 2 39 (37); d 1 – e 1 46 (43); d 2 –d 2 141 (118); d 2 – e 2 41 (41); e 1 – e 1 40 (36); e 1 – e 2 42 (37); e 2 –e 2 104 (87); e 1 –f 1 17 (23); f 1 –f 1 46 (57); f 1 –h 1 28 (24); h 1 –h 1 23 (22); h 1 –h 2 25 (24); h 2 –h 2 65 (66). Ratios: vi / vi –vi 0.7 (1.1), c 1 / c 1 –c 1 0.2 (0.3), d 1 / d 1 –d 1 0.1 (0.2), e 1 / e 1 – e 1 0.2 (0.3), f 1 / f 1 –f 1 0.3 (0.2); h 1 / h 1 –h 1 0.7 (0.9); c 1 –c 1 / d 1 –d 1 0.8 (0.8); c 1 –c 1 / e 1 – e 1 1.4 (1.2); d 1 –d 1 / e 1 – e 1 1.6 (1.5); h 1 / h 2 0.8 (1.0); c 1 –c 1: d 1 –d 1: e 1 –e 1: f 1 –f 1 = 1.4 (1.2): 1.6 (1.5): 1.0: 1.1 (1.5).

Venter of idiosoma ( Figs. 11 – 12View FIGURES 9 – 15). Ventral surface ornamented with striations; bearing three pairs of setae (1a, 3a and 4a). Aggenital shield divided by striae, ag 1 and ag 2 –ag 3 on separate platelets. Anogenital valves with one pair of genital (g 1) setae and three pairs of pseudanal (ps 1–3) setae. Seta g 1 not reaching base of ps 3. Setae ps 1 slightly barbed. Measurements of setae: 1a 73 (66); 3a 62 (63); 4a 50 (42); ag 1 12 (13); ag 2 10 (12); ag 3 12 (14); g 1 15 (18); ps 1 11 (11); ps 2 12 (13); ps 3 12 (13).

Gnathosoma. Subcapitulum ( Figs. 13 – 15View FIGURES 9 – 15) bearing subcapitular setae m 18 (16) and n 45 (37) and adoral setae or 1 9 (10) and or 2 11 (12). Distance m –m 25 (27), n –n 22 (23) and m –n 4 (4). Palpus ( Fig. 15View FIGURES 9 – 15), five segmented; palptrochanter without setae; palpfemur with three setae; palpgenu with one seta; palptibia with two tactile setae + one well-developed claw + one spine-like accessory claw; palptarsus with four tactile setae + one solenidion (ω), one subapical eupathidium and one distal trifid eupathidium.

Legs ( Figs. 11View FIGURES 9 – 15, 16 – 19View FIGURES 16 – 19). Dorsalmost seta on femur I (dFI) barbed, 13 (14); dorsalmost seta on genu I (dGI) barbed, 11 (12). Chaetotaxy: coxae (excluding 1a, 3a and 4a) 2(+lelcl)-1-2-1, trochanters 1-1-1-1, femora 4-4-2-2, genua 3(+1κ)-1-0-0, tibiae 5(+1φp)-5(+1φp)-5(+1φp)-5(+1φp), tarsi 12(+1ω)-8(+1ω)-6(+1ω)-6(+1ω). Length of solenidia: ωI 6 (7); ωII 6 (7); ωIII 4 (5); ωIV 3 (4).

Male ( Figs. 20–25View FIGURES 20 – 25). Dimensions (n = 1): Length of idiosoma 245; width of idiosoma 132; gnathosoma (including palp) 76; subcapitulum 50; palp 52; chelicera 63. Length of legs I –IV (from base of coxa to tip of tarsal claw): 121; 100; 101; 104. Lengths of dorsal setae: vi 10; ve 14; sci 10; c 1 11; c 2 11; d 1 9; d 2 9; e 1 9; e 2 9; f 1 11; h 1 10; h 2 15. Distances between dorsal setae: vi – vi 9; ve –ve 28; vi –ve 15; ve –sci 24; sci –sci 54; c 1 –c 1 39; c 1 –d 1 52; c 1 –c 2 39; c 2 –c 2 97; c 2 –d 2 59; d 1 –d 1 31; d 1 –d 2 37; d 1 –e 1 30; d 2 –d 2 97; d 2 –e 2 32; e 1 –e 1 23; e 1 –e 2 26; e 2 –e 2 63; e 1 –f 1 22; f 1 –f 1 31; f 1 –h 1 21; h 1 –h 1 17; h 1 –h 2 12; h 2 –h 2 34. Measurements of setae: 1a 51; 3a 55; 4a 37; ag 1 7; ag 2 10; ag 3 9; ps 1 4; ps 2 6; ps 3 10.

Male similar to female but differs in that aggenital area with three pairs of setae (ag 1–3) and an aedeagus visible ( Fig. 21View FIGURES 20 – 25), anogenital area without genital setae and with three pairs of pseudanal setae (ps 1 –ps 3); tarsi I –II bear an extra solenidion ( Figs. 22–23View FIGURES 20 – 25).

Immature stages: Unknown.

Remarks. The new species closely resembles Eryngiopus yasumatsui Ehara & Wongsiri, 1984  and E. yemenensis Van Dis & Ueckermann, 1993  in having three pairs of setae on a part of the propodosoma (setae sce absent), three pairs of aggenital setae (ag 1–3) and dorsal body setae finely barbed; however, it differs from the E. yasumatsui  by: 1) tarsi 12(+1ω)-8(+1ω)-6(+1ω)-6(+1ω) in the new species instead of 14-10-8- 8 in the latter; 2) setae ag 2 and ag 3 sharing a platelet whereas on two separated platelets in the latter. Eryngiopus moraesi  sp. nov. can be distinguished from E. yemenensis  by the following characteristics: 1) femur I with four setae in the new species instead of five in E. yemenensis  ; 2) having a suranal shield vs. absent in E. yemenensis  ; 3) ventral setae 1a, 3a and 4a shorter than those of the latter; 4) setae g 1 not reaching base of setae ps 3 but surpassing in the latter.

Etymology. The species is named in honor of Prof. Gilberto José de Moraes (ESALQ- University of São Paulo, Brazil), for his great contribution to Acarology.

Type materials. Holotype female and one paratype female from leaves of Coconut trees ( Cocos nucifera  L., Arecaceae  ), 11 Dec. 2012 at experimental field Caldeirão in Iranduba city, state of Amazonas, Brazil were collected by Wilton Pires da Cruz  ; one paratype female and one paratype male from leaves of Soursop trees ( Annona muricata  L., Annonaceae  ), 19 Apr. 2014 at Arapiraca city, state of Alagoas, Brazil were collected by Geovanny Barroso  . All types are deposited in the Acarological collection of Departamento de Entomologia e Acarologia, ESALQ-USP, Piracicaba, São Paulo State, Brazil.