Graptoppia (Apograptoppia) rooensis, Ermilov & Kontschán, 2023

Ermilov, Sergey G. & Kontschán, Jenő, 2023, Three new species of Oppiidae (Acari, Oribatida) from Mexico, Zootaxa 5360 (1), pp. 113-126 : 114-118

Graptoppia (Apograptoppia) rooensis sp. nov.

( Figures 1 , 2 )

Type material. Holotype (female) and seven paratypes (six males and one female): Mexico, 20°41’N, 87°03’W, Quintana Roo, Municipio de Solidaridad, vicinities of Playa del Carmen, leaf litter in a large karst pit under trees and bushes in secondary semi-evergreen tropical forest (data and collector unknown; collection of the Tyumen State University Museum of Zoology, Tyumen, Russia; Gashev et al. 2005).

The holotype is deposited in the collection of the Senckenberg Museum of Natural History, Görlitz, Germany; seven paratypes are in the collection of the Tyumen State University Museum of Zoology, Tyumen, Russia. All specimens are preserved in 70% solution of ethanol with a drop of glycerol.

Diagnosis. Body length: 195–210. Rostrum rounded. Rostrum rounded. Costula present, short; transcostula absent. Rostral, lamellar and interlamellar (11–15) setae setiform, slightly barbed (ro longest); bothridial seta with well developed head rounded distally and having about 11–12 ciliae unilaterally. Interbothridial region with two pairs of muscle sigillae and one pair of elongate triangular interbothridial tubercles. Notogastral seta c very short, setiform, smooth; other setae short, setiform, roughened; la inserted slightly posterolateral to lm. Epimeral and anogenital setae short, setiform, roughened. Adanal lyrifissure in direct apoanal position. Discidium rounded distally. Leg tarsus II with one solenidion.

Description. Measurements. Body length: 210 (holotype), 195–210 (male paratypes), 210 (female paratype); body width: 105 (holotype), 90–105 (male paratypes), 105 (female paratype).

Integument ( Fig. 1A ). Body color light brown. Body surface mostly smooth but region between bothridium and costula microgranulate (diameter of granule up to 1), and antiaxial side of femora I–IV and trochanters III, IV partially with rounded or elongate microtubercles.

Prodorsum ( Figs 1A, C ). Rostrum rounded. Costula comparatively short, thin; transcostula absent. Rostral (15– 19), lamellar (11–15) and interlamellar (11–15) setae setiform, slightly barbed; exobothridial seta (7–9) setiform, slightly roughened; ro slightly thicker than others; bothridial seta (32–34) with well developed head rounded distally and having about 11–12 ciliae unilaterally. Interbothridial region with two pairs of muscle sigillae and one pair of elongate triangular interbothridial tubercles; postbothridial tubercle present and a slight simple tubercle opposite postbothridial tubercle. Lateral carina absent.

Notogaster ( Figs 1A, C ). Anterior border narrowed medially. Notogastral seta c (4–6) setiform, smooth; other setae short (11–15) setiform, roughened; la inserted slightly posterolateral to lm. All notogastral lyrifissures and opisthonotal gland opening distinct.

Gnathosoma ( Figs 2A–C ). Subcapitulum size: 49–52 × 34–37; subcapitular setae (11–13) setiform, a and h slightly roughened, m sparsely barbed unilaterally; both adoral setae (4–5) setiform, smooth. Palp length: 34– 37; formula: 0–2–1–3–8(+ω); solenidion medium-sized, bacilliform, appressed to tarsus surface and located in its mediodistal part; postpalpal seta (2) spiniform, smooth. Chelicera length: 49–52; setae (cha: 13–15; chb: 9–11) setiform, barbed; antiaxial side of chelicera with one diagonal ridge.

Epimeral and lateral podosomal regions ( Figs 1B, C ). Epimeral setal formula: 3–1–3–3; all setae (3c: 13–15; others: 7–9) setiform, roughened. Epimeral border IV arch-like. Discidium present, rounded distally.

Anogenital region ( Figs 1B, C ). Genital (g 1: 7–9; others: 5–6), aggenital (9–11), adanal (9–11), and anal (9–11) setae setiform, slightly roughened. Adanal lyrifissure in direct apoanal position.

Legs ( Figs 2D–G ). Claw of each leg smooth. Trochanter III with posterior tooth. Porose area on femora I–IV and on trochanters III, IV present, dorsoparaxial, but poorly observable. Formulas of leg setation and solenidia: I (1–5–2–4–20) [1–2–2], II (1–5–2–4–16) [1–1–1], III (2–3–1–3–15) [1–1–0], IV (1–2–2–3–12) [0–1–0]; homology of setae and solenidia indicated in Table 1 . Setae p’ and p” setiform on tarsus I versus very short, conical on tarsi II–IV; seta s eupathidial on tarsus I; famulus short, erect, slightly swollen distally, located posterior to solenidion ω 1. Solenidia ω 1 on tarsus I, ω on tarsus II, φ on tibia II, III, and σ on genu III medium-sized, thickened, rounded distally; φ 1 on tibia I very long, subflagellate; other solenidia medium-sized, rod-like or setiform.

Remarks. Graptoppia (Apograptoppia) rooensis sp. nov. differs from the single (nominate) representative of the subgenus G. (A.) foveolata ( Paoli, 1908) from the Holarctic region and Hawaii (see Paoli 1908; Bernini 1969; Weigmann 2006) in having bothridial head rounded distally (versus pointed distally), the presence (versus absence) of interbothridial tubercles, the morphology of the anterior margin of the notogaster (narrowed medially versus broadly rounded medially), and the absence (versus presence) of transcostula.

Ermilov (2023) represented the generic diagnosis of Graptoppia , in which the presence of two solenidia on leg tarsus II was noted. However, G. (A.) rooensis sp. nov. has only one solenidion. Hence, this nuance must be applied in the future diagnosis of the genus.

Etymology. The species name rooensis refers to the place of origin, the Free and Sovereign State of Quintana Roo.

Figures

FIGURE 1. Graptoppia (Apograptoppia) rooensis sp. nov., adult (gnathosoma and legs omitted): A—dorsal view; B—ventral view; C—right lateral view. Scale bar 50 μm.

FIGURE 2. Graptoppia (Apograptoppia) rooensis sp. nov., adult: A—subcapitulum, ventral view; B—palp, right, antiaxial view; C—chelicera, left, paraxial view; D—leg I, right, antiaxial view; E—leg II (tarsus omitted), right, ventroantiaxial view; F—leg III (tarsus omitted), left, ventroantiaxial view; G—leg IV, left, antiaxial view. Scale bars 20 μm (A, C–G), 10 μm (B).