Aeroppia longisensilla, Ermilov, Sergey G., 2016

Ermilov, Sergey G., 2016, Contribution to the knowledge of the oribatid mite genus Aeroppia (Acari, Oribatida, Oppiidae), Zootaxa 4138 (2), pp. 349-362 : 356-358

Aeroppia longisensilla sp. nov.

( Figs 11–13 )

Diagnosis. Body size: 431–490 × 282–315. Rostrum rounded. Lamellar setae distanced from each other. Bothridial setae clavate, barbed, longer than interlamellar setae and exobothridial setae. Twelve pairs of notogastral setae present, h 1 absent, dorsal setae of medium size, setiform, slightly blunt-ended, stiff, barbed, c, p 2 and p 3 short, thin, smooth. Subcapitular setae setiform, barbed. Anal, adanal, genital and aggenital setae setiform, thin, slightly barbed.

Description. Measurements. Body length: 498 (holotype: female), 431, 490 (2 paratypes: 2 males); notogastral width: 315 (holotype), 282 (2 paratypes). Female larger than both males.

Integument ( Figs 11, 13 ). Body color light brownish. Body surface, subcapitular mentum and genae, genital and anal plates, and legs punctate. Lateral parts of body with small, dense cerotegumental tubercles (diameter of tubercles up to 2).

Prodorsum ( Figs 11, 13 ). Rostrum slightly protruding, rounded. Rostral (61–65), lamellar (73–82), interlamellar (49–53) and exobothridial (32–41) setae setiform, barbed; ex thinner than others, le distanced from each other. Bothridial setae (82–90) clavate, rounded distally, barbed, stalks clearly longer than heads. Longitudinal rows of muscle sigillae poorly visible anteriad to bothridia. Interbothridial muscle sigillae distinct. Lateral ridges well developed, clearly not reaching acetabula IV.

Notogaster ( Figs 11, 13 ). Twelve pairs of notogastral setae, h 1 absent. Setae da, la, dm, lm, dp, lp h 2, h 3 (53–51) and p 1 (36–41) setiform, slightly blunt-ended, stiff, barbed, c, p 2 and p 3 short (16–20), thin, smooth. Lyrifissures ia and ips well developed, im poorly visible, ih and ip not visible. Opisthonotal gland openings located laterally and close to im.

Gnathosoma. Morphology of subcapitulum, palps and chelicerae similar to Aeroppia friedrichi sp. nov. Size of subcapitulum: 102–106 × 82. Three pairs of subcapitular setae and two pairs of adoral setae setiform, barbed, h and m (32–41) longer than a (20) and or 1, or 2 (12). Length of palps: 77–82. Postpalpal setae (4) spiniform. Length of chelicerae: 102–106. Cheliceral setae setiform, cha (32) straight, with long cilia unilaterally, chb (20) slightly curved in median parts, barbed. Trägårdh’s organ tapered, indistinctly granulate.

4. When Subias et al. (2004) proposed mariehammerae for this species, they added " nom. nov. " to the name.Though a replacement name is given for an already established name in the Code, the original name published by Hammer (1962) has no specific name as " Aeroppia sp." Therefore, mariehammerae is not a replacement name in the sense of the ICZN. Article 16.4 requires a type (or types) when a new species is established after 1999. Though the Article has an exception in the case of a replacement name, mariehammerae , therefore, can not become the exception. Hammer's Aeroppia sp. having no type specimen because it is not a nominal taxon. The information of the deposition of specimens was not stated in Hammer's 1962 work, either. Subias et al (2004) should have fixed a holotype. Hence, the name Aeroppia mariehammerae is not a valid (available) name.

Lateral podosomal and epimeral regions ( Figs 12, 13 ). Epimeral setae setiform barbed, 3c (53–65) longer than 1b, 3b, 4a, 4c (41–45), 1a, 4b (32–41), 1c, 2a and 3a (16–24). Discidia rounded distally.

Anogenital region ( Figs 12, 13 ). Five pairs of genital (20–24), one pair of aggenital (20–24), three pairs of adanal (24–32) and two pairs of anal (28–36) setae setiform, slightly barbed. Setae ad 1 not thicker than ad 2 and ad 3. Adanal lyrifissures distinct.

Legs. Morphology of leg claws, segments, setae and solenidia and the leg formulas similar to Aeroppia friedrichi sp. nov. ( Table 1 ).

Material examined. Holotype (female) and 2 paratypes (2 males): Peru, 09°37'S, 74°56'W, Huánuco Department, Puerto Inca Province, Yuyapichis District, Área de Conservación Privada, Panguana (biological field station), nearby Rio Yuyapichis (river), 230–260 m a.s.l., upper soil and leaf litter in the primary evergreen lowland rainforest, Winkler extraction, 20.IX.2013 – 07.X.2013 (S. Friedrich and F. Wachtel).

Type deposition. The holotype is deposited in the collection of the Museo de Historia Natural, Universidad Nacional Mayor de San Marcos, Lima, Peru; 2 paratypes are deposited in the collection of the Tyumen State University Museum of Zoology, Tyumen, Russia.

Etymology. The specific name longisensilla refers to the long bothridial setae (sensilla).

Remarks. Aeroppia longisensilla sp. nov. is morphologically most similar to A. adjacens Mahunka, 1985 from the Neotropical region (see Mahunka 1985) in having clavate bothridial setae, 12 pairs of notogastral setae, stiff dorsal notogastral setae of medium size, lamellar setae distanced from each other and short notogastral setae p 2 and p 3. However, the new species differs from the latter by the smaller body size (431–490 × 282–315 vs. 574–631 × 344–384) and by long bothridial setae clearly longer than interlamellar setae (vs. bothridial setae shorter than interlamellar setae).

Figures

FIGURES 11 – 13. Aeroppia longisensilla sp. nov., adult: 11 — dorsal view (gnathosoma and legs not shown); 12 — ventral view (gnathosoma and legs not shown), 13 — lateral view (gnathosoma and legs not shown). Scale bar 100 µm.