Scheloribates yamaeensis Nakamura & Hashimoto & Nishi & Nakamura & Fujikawa 2015, n. sp.
Creators: name: Nakamura, Y. - N.
name: Hashimoto, S.
name: Nishi, Y.
name: Nakamura, Y.
name: Fujikawa, T.
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Sarcoptiformes
Scheloribatidae
Scheloribates
Scheloribates yamaeensis

description: Scheloribates yamaeensis n. sp.
[Japanese name: Yamae-shiwadani] (Figs. 6 - 10)
Diagnosis — Prodorsum triangular. Rostrum rounded. Lamellae narrower situated laterally, with prolamellae, without cusps and translamella. Sensillus barbed fusiform. Anterior margin of immovable pteromorphae not extending anteriorly beyond level of dorsosejugal scissure; pteromorphae with inward curve. Notogaster elongate with ten pairs of minute setae and four pairs of sacculi; each sacculi diverged. Notogastral integument plicate near posterior margin. Genito-anal setae 4(3, 5)-1(2)-2- 3; genital and aggenital setae variable in number. Adanal setae ad 3 situated in preanal position. Lyrifissures iad aligned along outline of anal aperture in adanal position. Posterial anal locking-pieces remarkable. Diarthric subcapitulum bearing 3 pairs of setae a, m, h. Epimeral setae 3-1-3-3, pedipalpal setae 0-2-1-3-9[1]. All legs heterotridactyl. Solenidiotaxy: I (1-2-2); II (1-1-2); III (1-1-0); IV (0-1-0). Femora II, III and IV with small leg-fin. Solenidia ω 1 and ω 2, famulus, and fastigial seta ft " aligned in a line; setae ft " smooth.
Material examined — Holotype (Male) (NSMT- Ac 13034) from litter, humus and soil materials at the chestnut Castanea crenata Sieb. et Zucc. plantation of Yamae Mura in Kumamoto Prefecture on 25 th Oct. 2007, by S. Hashimoto; 24 paratypes (NSMT-Ac, 13035: female): the same data as holotype. The type series with number of NSMT-Ac 13034 & 13035 is deposited in the National Museum of Nature and Science, Tokyo. The remainder of paratypes are deposited in the National Agricultural Research Center for Kyushu Okinawa Region, Kumamoto Prefecture.
Etymology — After the name of sampling locality.
Measurements and body appearance — Female (n = 13): Body length: 471 (508) 564 µm; width: 300 (345) 400 µm, male (n = 12): Body length: 457 (486) 514 µm; width: 293 (320) 379 µm. Body color light brown. The whole integument without granulation except for exobothridial region. Description of features in common of male and female:
Prodorsum — Triangular (Fig. 6A). Rostrum rounded. Rostral setae ro sparsely barbed, inserted at lateral sides, extending in front of the rostrum for a distance equal to about two-third of their length. Lamellar ridges narrower, situated at the lateral sides, with prolamellae but without cusps nor translamella, extending forward from underneath of anterior notogastral margin for a distance equal to almost two-third length of the propodosoma (ca. 125 µm) (Fig. 9A). Lamellar setae le sparsely barbed throughout length, inserted at the end of lamellae (Fig.8B), extending anterior to rostral setae. Interlamellar setae in sparsely spiculate throughout length (Fig. 6C), inserted anterior to the level of bothridia. Bothridial basal part covered by anterior margin of notogaster, opening anteriorly (Fig. 9D). Sensilli ss fusiform, ciliate (Fig. 7A). Exobothridial setae ex smooth, minute. Relative lengths and distances of prodorsal setae: ro: le: in: ss: ex = 1: 1.68:1.68: 1.13: 0.05; (ro-ro): (le-le): (in-in): (ro-le): (le-in) = 1: 1: 1: 0.3: 0.8.
Notogaster — Elongate, with broadly rounded anterior margin (Fig. 9C). Anterior margin of immovable pteromorphae not extending anteriorly beyond level of anterior notogastral margin; pteromorphae curved inward (Figs. 6D, 10D). Notogaster bearing 7 to 14 transverse plications near posterior margin (Fig. 9F). A number of light spots arranged peripherally. Dorsophragmatic apophyses hy small. Ten pairs of notogastral setae minute, smooth; c 2 and la on pteromorphae. Sacculi Sa, S1, S2 and S3 diverged (Figs. 8A, 9E, 10C): Sa situated antero-laterally to lm, S1 lateral to lp, S2 posterior to h 3, S3 postero-laterally to h 2, respectively. Lyrifissures ia located parallel to suture between pteromorpha and body posterior to c 2; im aligned obliquely at the antero-laterally to setae lp; ip longitudinally to outline of body between p 1 and p 2. Opisthosomal gland-opening situated posterolaterally to im. Relative distances between notogastral setae in central part of notogaster: (c 2 - c 2): (la-la): (lm-lm): (lp -lp): (h 3 - h 3): (h 2 - h 2): (h 1 - h 1): (p 1 - p 1) = 9: 11: 7: 7: 6: 5: 1: 2.
Ventral region — Genital and anal apertures roughly circular in outline (Figs. 6B, 6E, 10A); the latter about 1.5 × as long as the former; distance between them appreciably 1.5 × as long as anal aperture. Genito-anal setae: 4(3, 5)-1(2)-2-3; setae thin, smooth setiform (Fig. 7B); genital g and aggenital ag setae variable in number, but generally (4-4) and (1- 1), respectively. Genital setae g 1 and g 2 remote from g 3 and g 4. Setae ag inserted postero-laterally remote from genital aperture. Adanal setae ad 1 inserted in postanal position; ad 2 postero-laterally; ad 3 preanal. Lyrifissures iad aligned in the paraanal position, between the level of anterior margin of anal aperture and insertion of setae an 2. Posterial anal lockingpieces remarkable (Fig. 10B). Sternal ridge and epimeral border IV indistinct. Custodium extending at the level of trochanter II; discidium small (Fig. 8C). Epimeral setal formula: 3-1-3-3; setae thin, smooth setiform (Fig. 7B), variable in length. Diarthric subcapitulum bearing 3 pairs of setae; setae thin, smooth setiform (Fig. 7C). Mentum without remarkable transverse slit connected with inner pharynx. Chelicera bearing short Trägårdh’s organ (Fig. 7G). Two setae, cha and chb pilose; cha long, chb short. Pedipalpal chaetotaxy: 0-2-1-3-9[1]; tarsus with a short solenidion (ca. 9 µm) not extending forwards from tip of tarsus (Figs. 7F, 9B). Relative lengths of some of the ventral setae: 4c> 4a> g> ad> ag> an.
Legs — All tarsi heterotridactylous; claws dorsally serrate. Setal formula of legs including famulus but excluding solenidia: I (1-5-3-4-18), II (1-5- 2-4-16), III (2-3-1-3-14), IV (1-2-2-3-12). Femora of leg II, III and IV bearing small carina (Fig. 7E). Solenidiotaxy I (1-2-2), II (1-1-2), III (1-1-0), IV (0- 1-0). Famulus on tarsus I short, spiniform, situated between ω 2 and fastigial seta ft "; solenidion ω 1 and ω 2 short bacilliform; ω 2 longer than ω 1, inserted posteriorly to ω 1; ω 1, ω 2, famulus and ft " aligned almost in a line (Fig. 7D).
Description of different characters between male and female: Female with genital aperture and distance between genital and anal apertures longer than those of male.
Remarks — The new species has dorsal aspect similar to those of Scheloribates maoriensis Hammer (1968) and S. gunini Bayartogtokh (2000). However, the plications of posterial margin of notogaster and diverged sacculi are particular characters of the new species.
description: Published as part of Nakamura, Y. - N., Hashimoto, S., Nishi, Y., Nakamura, Y. & Fujikawa, T., 2015, Two new species of Eremellidae and Scheloribatidae (Acari, Oribatida) from the Kuma district of southern Japan, pp. 171-187 in Acarologia 55 (2) on pages 180-186, DOI: 10.1051/acarologia/20152159, http://zenodo.org/record/4640120