Stammeroplitis panguanaensis, Kontschán & Ermilov & Friedrich, 2023

Kontschán, Jenő, Ermilov, Sergey G. & Friedrich, Stefan, 2023, Contribution to the knowledge of the Neotropical Uropodina (Acari: Mesostigmata), Zootaxa 5360 (2), pp. 255-268 : 261-262

Stammeroplitis panguanaensis sp. nov.

( Figures 1–7 )

Diagnosis

Surface of dorsal shield smooth, dorsal setae lance-like. Only one pair of ventral setae present. All ventral idiosoma smooth. Perigenital line undulate in anterior and posterior parts. Prestigmatid part of peritreme U-shaped.

Material examined

Holotype. Female. Peru, Departamento Huánuco, Rio Yuyapichis, ACP Panguana , 9°37’S, 74°56’W, 230–260 m a.s.l., Winkler extraction, 1–21 May 2015, leg. S. Friedrich & F. Wachtel. Paratypes. Three females, locality and date as for holotype. Holotype and one paratype deposited in MUSM, two paratypes in ZSM .

Description

Female (n=4)

Length of idiosoma 460–510, width 390–400. Shape circular, posterior margin rounded, colour yellowish brown.

Dorsal idiosoma ( Figure 1 ). Marginal and dorsal shields fused in anterior area. Dorsal shield neotrichous, all dorsal setae straight, lance-like and ca 26–28 long. Dorsal shield without sculptural pattern. Surface of marginal shield smooth. Marginal shield bearing 26–30 pairs of straight and needle-like setae (ca 9–12 long).

Ventral idiosoma ( Figure 2 ). Surface of sternal shield smooth. Eight pairs of sternal setae smooth, st1 and st2 very short, ca 2–3 long, other sternal setae longer (ca 4–6). Setae st1 and st2 situated close to anterior margin of perigenital line, st3 and st4 at level of coxae II, and st5 at level of posterior margin of coxae III, st6 at level of anterior margin of coxae IV, st7 at level of posterior margin of coxae IV, st8 close to posterior margin of perigenital line. One pair of lance-like and ca 18–20 long ventral setae situated at level of central part of pedofossae IV. Pre-anal furrow present between posterior end of pedofossae IV. Posterior to pre-anal furrow one pair of 10–12 long and needle-like setae. Adanal (ad1 and ad2) and postanal (pa) setae smooth, needle-like and ca 6–7 long. One pair of lyriform fissure situated close to ventral setae, and one pair close to ad1. One pair of pores situated close to st7 and two pairs close to st8. Ventral shield without sculptural pattern. Poststigmatid part of peritreme short and straight, prestigmatid part U-shaped. Stigmata situated between coxae II and III. Genital shield circular (145–150 long and 125–130 wide) and without sculptural pattern. Perigenital line present, 230–235 long and 172–179 wide, anterior and posterior part of perigenital line undulate. Pedofossae deep, their surface smooth, separate furrows for tarsi IV present. Base of tritosternum narrow, vase-like, tritosternal laciniae subdivided into three pilose branches ( Figure 3 ).

Gnathosoma ( Figure 3 ). Corniculi horn-like, internal malae moustache-like and longer than corniculi. Hypostomal setae h1 (ca 17–19) and h2 (ca 11–14) smooth, h3 (ca 33–35 long) and h4 (ca 13–15) marginally serrate. Epistome apically serrate. Palp with smooth and needle-like setae. Fixed digit of chelicera longer than movable digit, fixed digit with two apical teeth, movable digit with one central tooth.

Legs ( Figures 4–7 ). All legs with smooth and needle-like setae, tarsi II–IV with some robust setae. Claws on first leg present, but smaller than others. All femora bearing flap-like ventral processes. Leg I 230–236, leg II 200–207, leg III 223–226, leg IV 225–229.

Male, nymphs and larva unknown.

Etymology. The species name derives from the collecting site, the Private Protected Area and Biological Field Station ACP Panguana in the evergreen lowland rainforest of Peruvian Amazonia.

Remarks

Only two other Stammeroplitis species have been described from the Neotropical Region. Both species ( S. mahunkaisimilis and S. uncinata ) are described based on males, but there are many visible and important species differences among these species that are not dependent on gender.

Figures

FIGURES 1–2. Stammeroplitis panguanaensis sp. nov., female holotype. 1. dorsal idiosoma; 2. ventral idiosoma.

FIGURES 3–7. Stammeroplitis panguanaensis sp. nov., female holotype. 3. Tritosternum and ventral view of gnathosoma and palp; 4–7. Legs I–IV, respectively, ventral view.