Dictyocladium reticulatum (Kirchenpauer, 1884), 2003

Galea, Horia R. & Schuchert, Peter, 2019, Some thecate hydroids (Cnidaria: Hydrozoa) from off New Caledonia collected during KANACONO and KANADEEP expeditions of the French Tropical Deep-Sea Benthos Program, European Journal of Taxonomy 562, pp. 1-70 : 42-43

publication ID	https://doi.org/10.5852/ejt.2019.562
publication LSID	lsid:zoobank.org:pub:6567F621-7A92-4D1A-8902-A1E76325AF94
DOI	https://doi.org/10.5281/zenodo.3475313
persistent identifier	https://treatment.plazi.org/id/03C0D256-AD67-6109-FE22-A53F5F20FDAC
treatment provided by	Plazi
scientific name	Dictyocladium reticulatum (Kirchenpauer, 1884)
status

Treatment

Dictyocladium reticulatum (Kirchenpauer, 1884) View in CoL

Fig. 15 View Fig

Dictyocladium reticulatum – Vervoort & Watson 2003: 124 View in CoL , figs 24E–G, 25A–C.

Material examined

PACIFIC OCEAN • a colony, 3.5× 3.5 cm, with female gonothecae; off New Caledonia, stn DW4725; 22°41′ S, 167°05′ E; 240–256 m; 20 Aug. 2016; KANACONO leg.; a fragment was used for DNA extraction, DNA 1402;voucher MHNG-INVE- 120831; MNHN-IK-2015-405 GoogleMaps • four colonies, 2.7× 1.6 cm (without gonothecae), 2.7× 3.8 cm (with female gonothecae), 3 × 2.9 cm (with female gonothecae) and 4× 2.6 cm (with female gonothecae); same collecting data as for preceding; MNHN-IK-2015-405 GoogleMaps • a colony, 2.5× 1.7 cm, without gonothecae; off New Caledonia, stn DW4741; 22°52′ S, 167°41′ E; 210 m; 23 Aug. 2016; KANACONO leg.; used as a whole for DNA extraction, DNA 1371; voucher MHNG-INVE- 120832; barcode identifier MK 073094 View Materials ; MNHN-IK-2015-406 GoogleMaps • three colonies, 4.3× 1.7 cm (without gonothecae), 4× 3.5 cm (with female gonothecae), and 3× 3.3 cm (with female gonothecae, and carrying epizoic Synthecium colony); same collecting data as for preceding; MNHN-IK-2015-406 GoogleMaps • four colonies without gonothecae, 4.5 × 4 cm, 1.5× 1 cm, 1.5 × 2 cm, and 2.5× 1 cm, respectively; off New Caledonia, stn CP4674; 22°48′ S, 167°29′ E; 311– 302 m; 13 Aug. 2016; KANACONO leg.; MNHN-IK-2015-407 GoogleMaps • a fertile colony, 5.2× 5.5 cm; off New Caledonia, stn DW4743; 22°52′ S, 167°34′ E; 380– 340 m; 23 Aug. 2016; KANACONO leg.; MNHN-IK-2015-468 GoogleMaps .

Remarks

The present material agrees in nearly all details with the description given by Vervoort & Watson (2003) of this species. However, some colonies have their stems and the basal part of their lower branches lightly but distinctly fascicled. In addition, examination of many gonothecae (from different colonies) seen in apical view showed that the external ridges are not always spirally arranged, as stated by Vervoort & Watson (2003), but they also form concentric ridges that are perfectly transverse in lateral view. All gonothecae agreed with the supposedly female ones described by these authors, but had up to 14 ridges in material MNHN-IK-2015-405 and up to 20 in material MNHN-IK-2015-406, although any other morphological difference could be noted (e.g., a slenderer appearance, as in the supposedly males described by these authors).

The 16S data (see Fig 20 View Fig and the ‘Molecular study’ section) strongly suggest that this species belongs to the Symplectoscyphidae , and not the Sertularidae in the sense of Maronna et al. (2016).

Distribution

Bass Strait, Tasmania ( Vervoort & Watson 2003), New Caledonia (present study).