Roynortonia vietnamica Ermilov 2011, n. sp.
Creators: name: Ermilov, S. G.
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Sarcoptiformes
Amerobelbidae
Roynortonia
Roynortonia vietnamica

description: <i>Roynortonia vietnamica</i> n. sp. <b>(Figures 1 – 3)</b> Diagnosis Body size 196 – 229 x 108 – 123; rostral and lamellar setae short, minute barbed; interlamellar setae long, barbed. Bothridial projections long, rigid, directed posterolaterally, 20 – 24, smooth. Notogastral spines very short (2 – 4), conical. Notogastral setae, 10 pairs, heterotrichous: anterior five pairs of medium long, posterior five pairs shorter. Setae <i>3b</i> (41), thorn-like. Description Measurements — Body length 217 (holotype, male), 196 – 229 (six paratypes; two males and four females); body width 114 (holotype, male), 108 – 123 (six paratypes; two males and four females). Integument — Body color light brown. Surface of body smooth. Granular and cloud-like cerotegument covers lateral parts of body and regions of dorsosejugal scissure and sejugal apodemes. Granules very small (diameter less than 1 µm). Prodorsum — (Figure 1A, C; Figure 2A–D). Rostral and lamellar setae 10 – 12, minute barbed. Interlamellar setae 36 – 45, barbed. Sensilli long, 57 – 65, setiform, with more than 20 cilia unilaterally. Bothridial projections long, rigid, directed posterolaterally, 20 – 24, smooth. Exobothridial setae very short (4), thin, smooth. Notogaster — (Figure 1A, C; Figure 2D). Notogastral spines very short (2 – 4), conical. Notogastral setae with indistinct barbs; setae <i>c</i>, <i>la</i>, <i>lm</i>, <i>lp</i> and <i>h</i> 3 (24 – 28) longer than others (12 – 16). Notogastral setae inserted on all notogaster surface. All lyrifissures and opisthonotal gland opening distinct; lyrifissures <i>ia</i> located posteriorly to notogastral spines. Anogenital region — (Figure 1B, C; Figure 2E, F). Two pairs anal (<i>an</i> 1, <i>an</i> 2, 10 – 12), three pairs adanal (<i>ad</i> 1 - <i>ad</i> 3, 12 – 20), one pair aggenital (<i>ag</i>, 10 – 20) and six pairs genital (<i>g</i> 1 - <i>g</i> 6, 4 – 6) setae setiform, smooth. Lyrifissures <i>iad</i> in direct apoanal position. Epimeral region — (Figure 1B, C; Figure 2G). Only apodemes 1, 2 and complete sejugal apodeme well-developed. Setae <i>3b</i> longest (41), thorn-like, smooth, inserted on large apophyses; setae <i>1a</i>, <i>2a</i>, <i>4a</i> shortest (12 – 16), setiform, slightly barbed; other setae 20 – 32, setiform, with short barbs. Gnathosoma — (Figure 2H–J). Subcapitulum longer than wide (45 – 49 x 32 – 34). Hypostomal setae setiform, smooth; <i>h</i> (8 – 10) little longer than <i>m</i> (6 – 8) and <i>a</i> (6). One pair of adoral setae (<i>or</i> 1, <i>or</i> 2) minute (1). Palp (length 32) with setation 0-2-1- 3-9(+1ω). Solenidion pressed to surface of palptarsus. Chelicera (57) chelate-dentate. Cheliceral setae setiform, barbed; <i>cha</i> (18) longer, than <i>chb</i> (12). Legs — (Figure 3A–D). Formulae of leg setation including famulus and solenidia (in square brackets): I (1-5-3-4-20) [1-2-2], II (1-5-3-4-16) [1-1-2], III (2-3-1-3-15) [1-1-0], IV (2-3-2-3-12) [0-1-0]; homology of setae and solenidia indicated in Table 1. All setae setiform. Famulus short, conical. Solenidia ω 1 on tarsi I, ω 1 and ω 2 on tarsi II, σ on genua III thickened, rod-like; solenidia ω 2 on tarsi I, ’ 1 and ’ 2 setiform; other solenidia thickened, strongly curved in median part. Roman letters refer to normal setae (<i>e</i> – famulus), Greek letters refer to solenidia. One apostrophe (ʹ) marks setae on anterior and double apostrophe (ʺ) setae on posterior side of the given leg segment. Parentheses refer to a pair of setae. Material examined — Holotype (male) and one paratype (male) were obtained from Cat Tien National Park, in southern Vietnam, 11°25’ N, 107°25’ E, 149 m a.s.l., in dark loamy soil of <i>Lagerstroemia</i> forest, February-March 2009, collected by A.E. Anichkin. Five paratypes (one male and four females) were obtained ibid, but: 11°26’ N, 107°25’ E, 145 m a.s.l., 20 November 2006, collected also by A.E. Anichkin. Type deposition — The holotype is deposited in the collection of the Center for Biodiversity Resources Education and Development (CEBRED), Hanoi National University of Education, Vietnam; four paratypes are deposited in the collection of the Siberian Zoological Museum, Novosibirsk, Russia; two paratypes (dissected) are in the personal collection of the author. Etymology — The specific name " <i>vietnamica</i> " refers to the country of origin, Vietnam. Distribution. — At present, this species is only known from Cat Tien National Park, in southern Vietnam.
description: Published as part of <i>Ermilov, S. G., 2011, A New Genus And Species Of Amerobelbidae (Acari: Oribatida) From Vietnam, pp. 275-282 in Acarologia 51 (3)</i> on pages 278-281, DOI: 10.1051/acarologia/20112012, http://zenodo.org/record/5404022