Polacanthoderes sp. 2

Sørensen, Martin V., Macheriotou, Lara, Braeckman, Ulrike, Smith, Craig R. & Ingels, Jeroen, 2025, Antarctic Kinorhyncha: Seven new species from the Antarctic Peninsula, European Journal of Taxonomy 1000 (1), pp. 1-102 : 30

Polacanthoderes sp. 2

Material examined

ANTARCTICA • 1 ♂ (mounted for SEM); Antarctic Peninsula, CRS 1776; 64°52.53′ S, 62°33.90′ W; 551 m b.s.l.; 7 Apr. 2016; FjordEco2; soft sediment; MVS .

Short description

One adult male was examined with scanning electron microscopy. The morphology of the specimens closely follows the species diagnosis of P. grzelakae sp. nov., except for the missing subdorsal tubes on segment 2. Subdorsal short acicular spines are present on segment 4, but missing on segment 5. Short laterodorsal acicular spines are present on segment 8.

Distribution

Antarctic Peninsula: Andvord Bay IBB, 551 m b.s.l. See Fig. 1 for geographic overview of stations and Table 1 for station and specimen information.

Figures

Fig. 1. Map showing the sampling stations. A. Overview of Antarctica, with the Antarctic Peninsula framed. Previous records of Polacanthoderes martinezi Sørensen, 2008 (green dots) and P. shiraseae Yamasaki et al., 2022 (red dots) are marked. B. Antarctic Peninsula with sampling area framed. C. Sampling area with station numbers and stations indicated as yellow dots. Study sites in Andvord Bay refer to OBA – Outer Basin A; MBA – Middle Basin A; IBB – Inner Basin B. Only stations yielding adult kinorhynch specimens are included.