Arthrostoma supriatnai Dewi & Purwaningsih & Hasegawa 2023, sp. nov.
Creators: name: Dewi, Kartika
name: Purwaningsih, Endang
name: Hasegawa, Hideo
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Nematoda
Chromadorea
Rhabditida
Ancylostomatidae
Arthrostoma
Arthrostoma supriatnai

description: Arthrostoma supriatnai sp. nov.
(Ancylostomatidae: Ancylostomatinae: Ancylostomatini: Arthrocephalinii)
(Figs. 1a–l; 2a–d)
General: Small and stout worm, cuticle transversely striated with striae 2.5–2.9 (2.7) apart. Anterior end curved dorsally. Mouth opening directed antero-dorsally, surrounded by four papillae and two amphids (Fig. 1b, 2a). Buccal capsule pyriform in lateral view, composed of ten articulating sclerotized plates (Figs. 1a, c, d), consisting of one large basal plate (B), two lateral plates (D), two laterodorsal (E), two lateroventral (C), one large triangular ventral plate (A), and two additional lateral plates (X). Mouth lacking teeth or cutting plates, but with one pair of ventral lancets (Figs. 1a, c). Dorsal esophageal gland well developed with duct passing in dorsal gutter (Fig. 1c). Esophagus club shaped, slightly swollen posteriorly, terminating in a lobed valve at junction with intestine; intestinal diverticulum present (Fig 1a). Cervical papillae finger-shaped (Fig. 2b).
Male: Total length 2.92 (2.72–3.11) mm; maximum width at level of posterior end of esophagus 304 (282–320), buccal capsule 101 (99–102) deep, 64 (63–66) wide. Nerve ring, excretory pore, and cervical papillae 311 (306– 318), 318 (305–330), and 418 (396–435) from anterior end, respectively. Esophagus length 515 (480–590), width 118 (111–124). Copulatory bursa symmetrical with large lateral lobes and small dorsal lobe, prebursal papillae small (Fig. 1h). Ventral rays stout, parallel, close together, cleft at middle of length. Lateral rays divergent from each other, externolateral shortest, mediolateral almost same length with posterolateral. Externodorsal rays derived from base of dorsal ray. Dorsal ray long, bifurcated near distal end, each branch bifid into outer and inner offshoots, and each inner offshoot divided again apically (Fig.1j). Simple genital cone present with one pair of tiny dorsal raylets and one pair of ventral cuticular appendages. Spicules 372 (350–390) long, equal and similar, slender tubular, transversely striated alae, with sharply pointed tip (Fig. 1k). Gubernaculum arrow-shaped, 104 (102–105) long (Fig. 1l).
Female: Total length 3.51 (3.28–3.77) mm; maximum width 323 (310–336) at level of vulva. Buccal capsule 120 (119–122) deep. Nerve ring, excretory pore, and cervical papillae 349 (315–405), 367 (339–430), and 476 (463–497) from anterior end, respectively. Esophagus length 675 (600–690), width 137 (123–147). Vulva at 1.44 (1.35–1.61) mm from posterior end, with large and protruding prevulval flap and postvulval spherical swelling (Figs. 1f, 2c). Vagina short, uteri opposed. Tail 360 (324–390) long, tapering to elongate, sharp terminal spike (Figs. 1e, 2d). Eggs not embryonated in uteri, oval, thin–shelled, 62 (60–65) x 39 (30–50) (Fig. 1g).
description: Published as part of Dewi, Kartika, Purwaningsih, Endang & Hasegawa, Hideo, 2023, Arthrostoma supriatnai sp. nov. (Nematoda: Ancylostomatidae) parasitic in Mydaus javanensis (Carnivora: Mephitidae) from Mount Ciremai, Java, Indonesia, pp. 89-95 in Zootaxa 5353 (1) on page 90, DOI: 10.11646/zootaxa.5353.1.7, http://zenodo.org/record/8427031