A New Free-living Marine Nematode Species of the Genus Graphonema (Nematoda: Chromadorida: Chromadoridae) from Antarctica Author Shimada, Daisuke Department of Biology, Keio University, 4 - 1 - 1 Hiyoshi, Yokohama, Kanagawa 223 - 8521, Japan E-mail: dsk-shimada @ keio. jp & Corresponding author shimada@keio.jp Author Tsujimoto, Megumu National Institute of Polar Research, 10 - 3 Midori-cho, Tachikawa, Tokyo 190 - 8518, Japan Author Watanabe, Kentaro National Institute of Polar Research, 10 - 3 Midori-cho, Tachikawa, Tokyo 190 - 8518, Japan text Species Diversity 2019 2019-05-25 24 1 61 67 http://dx.doi.org/10.12782/specdiv.24.61 journal article 7111 10.12782/specdiv.24.61 8f13fe75-5503-4124-a1dc-fe32e5fb8120 2189-7301 4585216 705B2008-A817-4DF9-B166-9F7F02AA6495

Table 1. Measurements of Graphonema antarcticum sp. nov. All measurements are in µm, except for the de Man’s ratios, and in the form: mean±s.d. (range). * ICHUM 5869.

		Male	Female
Character
	Holotype	Paratypes	Paratypes
n	—	6	5
L	2250	2315±193 (2030–2480)	2530±196 (2240–2750)
a	25.9	27.1±1.2 (25.1–28.6)	23.3±1.2 (21.9–24.5)
b	8.2	8.6±0.4 (8.3–9.4)	8.8±0.6 (8.2–9.5)
c	9.7	9.2±0.4 (8.8–9.8)	8.4±1.1 (7.3–10.1)
V	—	—	46.5±0.4 (45.9–47.1)
Cephalic diameter	23	23±1.4 (22–26)	25±1.2 (23–26)
mbd	87	86±7.7 (71–92)	109±9.1 (100–122)
vbd	—	—	94±6.4 (87–104)
abd	59	56±10 (38–68)	48±6.5 (39–57)
Posterior end of pharynx from anterior body end	275	268±18 (244–290)	287±11 (270–302)
Posterior end of ventral gland cell from anterior body end	391	399±22 (365–420)	457±59 (382–546)
Tail length on arc	232	251±15 (226–270)	332±8.7 (326–347)
Spicule length	82, 86	86±1.9 (83–89)	—
Gubernaculum whole length	43	45±1.6 (43–47)	—
Lateral piece length	35	34±1.1 (33–36)	—
Testis from anterior body end	486	557 *	—
Vulva from anterior body end	—	—	1177±96 (1027–1280)
Anterior end of anterior ovary from anterior body end	—	—	584±116 (428–705)
Posterior end of posterior ovary from anterior body end	—	—	1870±27 (1843–1896)