Hypoaceus eugenitalis ( Karg, 1978 )

Nemati, Alireza, Gwiazdowicz, Dariusz J. & Riahi, Elham, 2021, A new genus of Laelapidae (Acari: Mesostigmata) from South America, Persian Journal of Acarology 10 (2), pp. 167-189 : 172-178

publication ID	https://doi.org/10.22073/pja.v10i2.64420
publication LSID	lsid:zoobank.org:pub:738A6BAA-9164-479A-9950-775A3EEE4599
persistent identifier	https://treatment.plazi.org/id/AF77302C-642F-9F6E-BBCC-FA31FAFFFDE0
treatment provided by	Carolina
scientific name	Hypoaceus eugenitalis ( Karg, 1978 )
status

Treatment

Hypoaceus eugenitalis ( Karg, 1978) ( Figs. 1–6 View Figure 1 View Figure 2 View Figure 3 View Figure 4 View Figure 5 View Figure 6 )

Hypoaspis ( Hypoaspis) eugenitalis Karg, 1978: 22 .

Hypoaspis ( Alloparasitus) eugenitalis – Karg 1979: 75; Karg 1982: 237; Karg 1989: 119; Huhta and Karg 2010: 328.

Laelaspis eugenitalis – Freira 2007: 209.

Alloparasitus eugenitalis – Casanueva 1993: 157; Moreira 2014: 109.

Hypoaspis ( Hypoaspis) eugenitalis – Nemati and Gwiazdowicz 2016: 43.

The most taxonomic names mentioned above, have been cited in Moreira (2014).

Specimens examined

Type materials of this species have been collected from Chile, Valdivia, Misituni. In Museum für Naturkunde Berlin two microslides ( one female and one male) were collected from Chile: female specimen , ZMB Nr. 40148, Slide Number 4033, 12.01.1965 ; male specimen, ZMB Nr. 40147, Slide Number 4032, 10.24.1965 . All other specimens designated as Hypoaspis eugenitalis deposited in Museum für Naturkunde Berlin; three alcoholic tubes with numbers of : ZMB Nr. 40135, Argentina, Alkoholpraparate (Karg-Nr.) 1183, 1965 ; ZMB Nr. 40136, Chile, Alkoholpraparate (Karg-Nr.) 1184, 1965 and ZMB Nr. 40137, Argentina, Alkoholpraparate (Karg-Nr.) 1185, 1961 contain 50, 2 and 2 mites respectively. The microslides : ZMB Nr. 40138, female, South America, Argentina, Slide Number 4018, 10.12.1961 ; ZMB Nr. 40139, female, South America, Argentina, Slide Number 4024, 10.30.1961 ; ZMB Nr. 40140, female, South America, Argentina, Slide Number 4025, 11.13.1961 ; ZMB Nr. 40141, male, South America, Argentina, Slide Number 4026, 11.13.1961 ; ZMB Nr. 40142, male, South America, Argentina, Slide Number 4027, 09.26.1961 ; ZMB Nr. 40143, male, South America, Argentina, Slide Number 4028, 10.12.1961 ; ZMB Nr. 40144, male, South America, Argentina, Slide Number 4029, 06.14.1961 ; ZMB Nr. 40145, female, South America, Argentina, Slide Number 4030, 07.18.1961 ; ZMB Nr. 40146, female, South America, Argentina, Slide Number 4031, 11.09.1961 . The following slides based on their qualities have been used for drawings (the information presented here is based on the data on microslide labels): Hypoaspis eugenitalis Karg , female, Chel. No. 4018. Argentinien, Rio Negro, El Bolson, Votgeb. d. Piltriquitron, 460m, Laubstreu, 12.10.61; Hypoaspis eugenitalis Karg, 1978 , female, Chel. No. 4024. Argentinien , Rio Negro, El Bolson, Vorberg vom Mt. Piltriquitron , 400m, Laubstreu, 30.10.61; Hypoaspis eugenitalis Karg, 1978 ; Chel. B. II, 4026; [ ZMB Kat. Nr. 40141]; Male, Argentinien , Rio Negro, El Bolson, Berg, Piltriquitron, 1170m, Moosiges, Gras vom Rande eines Nothofagus-Waldes, 13.11.61; Hypoaspis eugenitalis Karg, 1978 , Male, No. 4029. Argentinien , Rio Negro, El Bolson, Piltriquitron , 480m, Frisches Moos von Fels, 14.04.61 .

Diagnosis

Setae r6 located on soft cuticle, Zx3 present, dorsal setae Z4-5 and S4-5 are more elongate than the others; epistome with fair denticles in lateral and anterior margins; bearing a supralabral process as a slender and pointed style; genitiventral shield reticulated throughout with pore-like structures on surface; the gd6 pustule like; male holoventral shield bears several pore-like structures on the surface.

Description (Female)

Dorsal idiosoma ( Fig. 1A View Figure 1 ) – Dorsal idiosoma oval-shaped, (878–889) long, (623–650) wide, with scanty ornamentation throughout, holotrichous both in podonotal and opisthonotal parts; with 23 pairs of setae on podonotal region including of one pair of extra paired setae ( zx) between z2–z3, dorsal setae designated as j1–6; z1–6 and one pair of zx; s1–6 and r2–5. Opisthonotal area of shield with 16 pairs of setae designated J1–5; Z1–5; S1–5 and one pair of Zx3. setae z1 is the shortest ( Fig. 2A View Figure 2 ), and S5 the longest ( Fig. 1A View Figure 1 ). Most dorsal shield setae moderate or elongate. The sizes of dorsal shield setae are as follows: j1: 60–63; j2–5: 93–102; j6: 70–73; z1: 23–25; z2–6: 89-93; s1–6: 99– 112; r2: 77–80; r3–5: 99–113; J1–3: 70–74; J4--5: 102–120; Z1: 129–132; Z2: 80–84; Z3: 120–124; Z4: 150–168; Z5: 155–162; S1: 90–95; S2–3: 100–109; S4: 145–156; S5: 185–197; Zx3: 84–91. Dorsal shield with 19 pairs of pore-like structures, an enlarged pore like structure (pustule-like in appearance) which probably accompanied by gd6 and is1 at dorso-marginal side of opisthonotal region (bent down in ventral side of Fig. 1B View Figure 1 ) present near the setae Z1.

Ventral idiosoma ( Fig. 1B View Figure 1 ) – Tritosternum with columnar base 65–72 long, 20–24 wide, and pilose laciniae 182–190 long. Pre-sternal plates well sclerotized with 68–72 long and 25–28 wide with fair striae on surface. Sternal shield ( Figs. 1B View Figure 1 , 2B, C View Figure 2 ) 141–145 long, 178–183 wide at level of setae st2 and 352–358 at level of lateral projections between coxae II-III, ornamented throughout, except in medio-posterior area which is smooth, anterior and posterior margins of shield concave, lateral margins alongside coxae II-III fused with endopodal plates. Sternal shield with three simple acicular pairs of setae, st1: 83–86, st2: 105–108, st3: 103–105; the distances between sternal setae: st1-st1: 90–96, st2-st2: 105–108, st3-st3: 201–206, iv1–2 slit-like, iv1 located between st1 setae, distance between iv1–iv1 10–12, iv2 located between st2–3 almost at level of projection between coxae II-III, iv2-iv2 191–199. Setae st4 absent and lyrifissures iv3 located on postero-corner of sternal shield at the tip of interior section of endopodal III-IV ( Figs. 2B, C View Figure 2 ). Genitiventral shield 462–475 long, 289–292 wide at level of genital setae, 451–460 wide at widest part, bearing three pairs of setae including genital setae, st5: 100–103, Zv1–2: 138–146, Jv1–2: 69–92, paragenital lyrifissure ( iv5) located on the surface of podal plate at level of genital setae ( Figs. 2B, C View Figure 2 ). Genitiventral surface fairly reticulate and bears numerous of different sized pore-like structures. Metapodal plates only could be seen in some specimens and almost fused with lateral margins of genitiventral shield ( Fig. 2C View Figure 2 ). Anal shield subtriangular with anterior margin convex, 127–139 long, 224–231 wide; paranal setae acicular (43–49), post-anal seta (23–26), gland pores gv3 on lateral margins of anal shield. Cribrum normally developed posteriorly and laterally around postanal seta. Stigma located at posterior level of coxa III, stigmatal plate ending in a poststigmatal extension of peritrematal shield ( Fig. 1B View Figure 1 ) bears two-three pore-like structures. Peritreme anteriorly extending to mid-level of coxa I, peritrematal shield at level of coxae II-III bearing gd3 accompanied by id3 and small shoulder shield present near coxa I. Podal, endo- and exopodal plates described in genus definition.

Gnathosoma ( Figs. 3A–D View Figure 3 ) – Setae h1 and h2 (59–67), h3 (69–73); palpcoxal seta ( pc) 49–55 long. Deutosternal groove with seven multidenticulate rows. Corniculi horn-like, with 54–59 long, 6–10 wide at midlevel, internal malae complex, with two pairs of lobes, inner lobes slender and long (55–60), lateral lobes smaller (29–33), wider with short hairs, extending to the midlevel of curniculi ( Fig. 3A View Figure 3 ). Epistome ( Fig. 3B View Figure 3 ) acuminate and fairly denticulate, with prominent denticles at anterior and lateral margins. Supralabral process style like.

Chelicerae ( Fig. 3C View Figure 3 ) – With setaceous dorsal seta (21–25), arthrodial process and lateral lyrifissure; movable digit 68–75 long medially from top to posterior margin, with two teeth, middle article (152–157) ending in fixed digit (70–79 long from top to level of dorsal seta), bearing two distal, one large tooth at midlevel and one smaller proximal tooth in addition to distal hook, small needle-like pilus dentilis alongside the larger cheliceral tooth. Palp segment lengths as follows: trochanter (55–61), femur (75–81), genu (47–55), tibia (39–44) and tarsus (23–27), palp chaetotaxy ( Fig. 6D View Figure 6 ) normal ( sensu Evans & Till 1965), with smooth acicular setae, palp-tarsal claw two-tined ( Fig. 3D View Figure 3 ). Labrum ( Fig. 3A View Figure 3 ) slender and pubescence.

Legs ( Fig. 4 View Figure 4 , 6A–D View Figure 6 ) – Tarsi I-IV with developed claws and ambulacra, female and male specimens with similar legs setae ( Figs. 6A, 6C, D View Figure 6 ) except legs II ( Figs. 4 View Figure 4 , 6B View Figure 6 ). Leg I ( Fig. 6A View Figure 6 ) 761– 802 long, coxa (88–95), trochanter (60–65), femur (161–164), genu (107–116), tibia (114–129), tarsus (231–233); leg II ( Fig. 4 View Figure 4 ) 535–669 long, coxa (51–61), trochanter (86–91), femur (95–116), genu (84–86), tibia (74–82), tarsus (145–166); leg III ( Fig. 6C View Figure 6 ) 529–588 long, coxa (53–55), trochanter (80–89), femur (110–113), genu (75–90), tibia (63–75), tarsus (148–166); leg IV ( Fig. 6D View Figure 6 ) 666–801 long, coxa (52–69), trochanter (95-106), femur (121–163), genu (81–103), tibia (95–109), tarsus (222–251). All leg setae smooth, some spur or spine-like as in Figures 4 View Figure 4 , 6B View Figure 6 . Chaetotaxy of legs is as same as in genus (see above). The situation of setae thickness in male and female is similar in all legs except leg II which separately figured in both sexes. Leg I ( Fig. 6A View Figure 6 ): In trochanter al and in femur pd2-3 slightly thicker than the other setae on the segment. Leg II ( Fig. 4 View Figure 4 ): in tarsus setae mv, av2, pv2, al1, and md spine-like and thicker than other setae on the segment; setae av1 and pv1 strong spine-like. Leg III ( Fig. 6C View Figure 6 ): in tarsus setae mv, av1-2, pv1, al1 and pl1 thicker than the others on the segment. Leg IV ( Fig. 6D View Figure 6 ): femur ( ad2 and pd thicker than the others on the segment) and genu ( pl slightly thicker than other setae on the segment).

Male ( Figs. 5–6 View Figure 5 View Figure 6 ).

Dorsal idiosoma – Dorsal idiosomal length 729–734 width 491–545. Dorsal shield chaetotaxy similar to female with slightly smaller setae.

Ventral idiosoma ( Fig. 5A View Figure 5 ) – With one pair of presternal plates with striae on surface located at either sides of genital orifice at anterior middle part of holoventral shield. Holoventral shield with ornamentation observed in anterior part, 152–163 wide in area of st2, expanded posterior to coxae IV and created the widest part (389–403 wide posterior to coxae IV) then tend to be irregularly pointed toward the anus. Numerous pore-like structures present on the surface of the shield at level of st3 to area posterior to coxae IV ( Fig. 5A View Figure 5 ). The shield bearing 10-11 pairs of smooth acicular setae. Lyrifissures iv1–2 slit-like located at base of st1 and between st2-st3 respectively, iv3 slit-like between st3-st4. Endopodals fused with holoventral shield from anterior level of coxae II to area adjacent to midlevel of coxae IV. Stigmatal opening surrounded by wide peritrematal shield. Posterior extension bear three pore-like structures [ is1, gp3, ip3 following Moraza and Lindquist (2018)]. The broad peritrematal plate with widest area at level of coxae II-III, bearing gp2 and ip2 following Moraza and Lindquist (2018). Peritreme long, extended to anterior margin of coxa I.

Gnathosoma – Movable digit (170–175) of chelicera with one large tooth ( Fig. 5B View Figure 5 ), spermatodactyl (260–266 long: from anterior tip to the attachment place to movable digit) much longer than movable digit, bent apically over it, with a small pore-like structure at distal bend which connected to a longitudinal tube inside the spermadactyl extended to a small fossa basally at basal part of movable digit ( Fig. 5C View Figure 5 ). Fixed digit with two teeth. Dorsal seta, cornet-shape setae, lyrifissure and setaceous pilus dentilis are present.

Legs ( Figs. 6A–D View Figure 6 ) – Tarsi I-IV with developed claws and ambulacra, legs setae of male specimens are similar to female except legs II ( Figs. 6B View Figure 6 ). Leg I ( Fig. 6A View Figure 6 ) 738–788 long, coxa (90– 98), trochanter (50–60), femur (158–165), genu (110–113), tibia (122–134), tarsus (208–218); leg II ( Fig. 6B View Figure 6 ) 559–615 long, coxa (51–61), trochanter (87–90), femur (101–128), genu (85–89), tibia (85– 92), tarsus (150–155); leg III ( Fig. 6C View Figure 6 ) 473–506 long, coxa (53–54), trochanter (66–68), femur (86– 98), genu (64–70), tibia (60–69), tarsus (144–147); leg IV ( Fig. 6D View Figure 6 ) 651–725 long, coxa (56–61), trochanter (78–103), femur (128–145), genu (92–96), tibia (90–93), tarsus (207–227). All leg setae smooth, some spine-like as in Figs. 6B, C View Figure 6 . Chaetotaxy of legs is as same as in genus (see above). The chaetotaxy and setae thickness in male and female legs are similar except legs II. Seta pv 1 in male femur II is strong spur-like, av1 and pv 1 in tarsus II are strong spine-like setae ( Fig. 6B View Figure 6 ).