Diphascon (Diphascon) zaniewi Kaczmarek & Michalczyk, 2004, sp. nov.
Creators: name: Kaczmarek, L Ukasz
name: Michalczyk, L Ukasz
Publisher: name: Zenodo
Year: 2004
Subjects: Biodiversity
Taxonomy
Animalia
Tardigrada
Eutardigrada
Parachela
Hypsibiidae
Diphascon
Diphascon zaniewi

description: 1. Diphascon (Diphascon) zaniewi sp. nov.
(Figs 1–4; Tab. 1)
Description
Holotype (2272/1): Body length 184.3 (Fig. 1). Body slender, transparent, eyes absent. Cuticle on dorsal and ventral side smooth and without pores. Peribucal lamellae and papulae absent.
Bucco­pharyngeal apparatus without strengthening bar. Drop­shaped structure between rigid buccal and flexible pharyngeal tube present. Bucco­pharyngeal tube 53.2 long. Buccal tube 18.5 long and 0.9 [4.9] wide (34.8 % of total length of bucco­pharyngeal tube). Pharyngeal tube 34.7 long and 0.9 [4.9] wide. At end of pharyngeal tube small triangular apophyses present. Stylet supports inserted on buccal tube at 10.9 [58.9]. Pharyngeal bulb oval with three rod­shaped macroplacoids (without central constrictions), very small granular microplacoid and septulum. First macroplacoid 2.9 [15.7] long, second 2.9 [15.7] long and third 4.3 [23.2] long. First and second macroplacoid in same length and each distinctly shorter then third one (configuration: 1­1­2). Septulum 1.9 [10.3] long. Macroplacoid row 11.4 [61.6] long. Placoid and septulum row 14.3 [77.3] long (Fig. 2).
Claws well developed and with distinct accessory points on primary branches. Claws on III pair of legs: external 8.6 [46.5], internal 6.2 [33.5]; IV pair of legs: posterior 9.5 [51.4], anterior 6.7 [36.2]. Lunules and other cuticular structures on legs absent (Figs 3–4). Eggs unknown.
Type material
Holotype (2272/1) and 7 (3 in simplex stage) paratypes on two slides (2272/1 and 2272/3): South Africa, Sun City, Dragon Mountains, moss from soil, 1000 m asl, near the waterfall, 12.2003, leg. Krzysztof Kaczmarek.
Type depositories
Holotype (2272/1) and 3 paratypes (2272/1) (one in simplex stage) are preserved at the Department of Animal Taxonomy and Ecology, A. Mickiewicz University, Pozna–, 3 paratypes (2272/3) (2 in simplex stage) are preserved in the collection of £. MICHALCZYK (Jagiellonian University, Poland).
Differential diagnosis
Diphascon (Diphascon) zaniewi sp. nov. differs from all species of the pingue group by having a very narrow buccal tube (less then 1.0) and second macroplacoid in the same length as the first one. Besides, it differs from the most similar:
1. Diphascon. (D.) pingue Marcus, 1936 by: smaller percentage proportion of buccal tube to bucco­pharyngeal tube (37.8–39.8 in D. (D.) pingue and 34.8–35.9 in D. (D.) zaniewi sp. nov.); longer macroplacoid row (6.7–10.7 [53.5–58.8] in D. (D.) pingue and 11.4–11.9 [61.6–65.7] in D. (D.) zaniewi sp. nov.); longer placoid and septulum row(8.7– 13.9 [51.5–62.9] in D. (D.) pingue and 14.3 [77.3–79.0] in D. (D.) zaniewi sp. nov.).
2. Diphascon (D.) pinguiforme Pilato & Binda, 1997 /98 by: smaller percentage proportion of buccal tube to bucco­pharyngeal tube (37.04 in D. (D.) pinguiforme and 34.8– 35.9 in D. (D.) zaniewi sp. nov.); shorter macroplacoids 1 and 2 (I­ 3.4–3.6 [18.7–19.0]; II­ 3.1–3.6 [16.9–19.0]) in D. (D.) pinguiforme and (I­ 2.9 [15.7–16.0]; II– 2.9 [15.7–16.0]) in D. (D.) zaniewi sp. nov.); shorter septulum (2.2–2.5 [11.8 –13.8] in D. (D.) pinguiforme and 1.9 [10.3–10.5] in D. (D.) zaniewi sp. nov.).
description: Published as part of Kaczmarek, L Ukasz & Michalczyk, L Ukasz, 2004, Notes on some tardigrades from South Africa, with the description of Diphascon (Diphascon) zaniewi sp. nov. (Eutardigrada: Hypsibiidae), pp. 1-6 in Zootaxa 576 on pages 2-5, DOI: 10.5281/zenodo.157712