Gordionus maori (Nematomorpha: Gordiida), a new species of horsehair worm from New Zealand

Figures & data

Figure 1. Collection sites in Otago, South Island, New Zealand. ID, Ida Range; OM, Old Man Range; RP, Rock and Pillar Range.

Table 1. GenBank accession numbers of nematomorph sequences used for phylogenetic analyses.

Species	18S	COI	Reference
Chordodes morgani	AF036639	KU721072	Blaxter et al. 1998; Harkins et al. 2016
Chordodes sp. BH-2013		KF381359	Bolek et al. 2013
Chordodes sp. BSG-2002	AF421763		Bleidorn et al. 2002
Chordodes fukuii		AB647244	Sato et al. 2012
Gordionus chinensis		AB741906	Sato et al. 2014
Gordionus lokaaus		JX244234	Begay et al. 2012
Gordionus bilaus		JX244228	Begay et al. 2012
Gordionus kii		AB647252	Sato et al. 2012
Euchordodes nigromaculatus	AF421764	KY172745	Bleidorn et al. 2002; Tobias et al. 2017
Gordius aquaticus	X80233		Winnepenninckx et al. 1995
Gordius attoni		KM382318	Hanelt et al. 2015
Gordius albopunctatus	U88337		Aleshin et al. 1998
Gordius balticus		KM382320	Hanelt et al. 2015
Gordionus alpestris	KT202292		Efeykin et al. 2016
Gordionus sp. BD15	KT202294		Efeykin et al. 2016
Gordionus wolterstorffi	AF421765		Bleidorn et al. 2002
Neochordodes occidentalis	AF421768	JN881995	Bleidorn et al. 2002; Looney et al. 2012
Parachordodes diblastus		KY172746	Tobias et al. 2017
Paragordionus dispar	AF421769		Bleidorn et al. 2002
Paragordionus rautheri	AF421770		Bleidorn et al. 2002
Spinochordodes tellini	AF421773		Bleidorn et al. 2002

Figure 2. Composite 18S maximum likelihood (ML)/Bayesian inference phylogenetic tree of Gordionus maori specimens and selected nematomorph reference sequences. Bayesian posterior probabilities shown above nodes; ML bootstrap support values shown below nodes. The branch containing the specimens of Gordionus maori n. sp. is marked in red. The labels of the specimens are their accession numbers (see text).

Figure 3. Composite CO1 maximum likelihood (ML)/Bayesian inference phylogenetic tree of Gordionus maori specimens and selected nematomorph reference sequences. Bayesian posterior probabilities shown above nodes; ML bootstrap support values shown below nodes. The branch containing the specimens of Gordionus maori n. sp. is marked in red. The labels of the specimens are their accession numbers (see text).

Figure 4. Gordionus maori n. sp. A, Overview of the cuticle of ZMH V13407; B–F, pattern of areoles and interareolar spaces in specimens ZMH V13406 (B), ZMH V13407 (C), paratype OMNZ IV85079 (D) and ZMH V13408 (E–F); G, fine structure of areoles and interareolar structures in ZMH V13407.

Figure 5. Gordionus maori n. sp. A–C, Ventral view of posterior end of ZMH V13406 (A), ZMH V13407 (B) and OMNZ IV85078 (holotype) (C). Encircled is the region of the cloacal opening, pbr indicates the precloacal rows of bristles; D, lateral view of a row of very large bristles in the holotype (OMNZ IV85078).

Figure 6. Gordionus maori n. sp. A–B, Magnification of precloacal bristles (pbr), encircled are some examples of apically branching bristles. ZMH V13407 (A), holotype (OMNZ IV85078) (B); C, spines (arrows) on the inside of the tail lobes in holotype; D, hemispherical areoles and short bristles (arrows) on the tips of the tail lobes in ZMH V13407.

Figure 7. Gordionus maori n. sp. A, Posterior end of female specimen OMNZ IV85079 (paratype); B–D, anterior end in female specimen ZMH V13408, showing the changing pattern between smooth tip of the animal, region of alternate cuticular structure and transition to areoles. D shows the fine structure of the intermediate area.

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