Acryptolaria profunda, Peña Cantero & Vervoort, 2010
publication ID |
https://doi.org/ 10.5252/z2010n2a5 |
DOI |
https://doi.org/10.5281/zenodo.4551925 |
persistent identifier |
https://treatment.plazi.org/id/03E5636A-FFB1-FF8B-FCE6-52AE7725FC26 |
treatment provided by |
Felipe |
scientific name |
Acryptolaria profunda |
status |
sp. nov. |
Acryptolaria profunda View in CoL n. sp.
( Figs 23 View FIG ; 30 View FIG ; 32F View FIG ; Table 24)
TYPE MATERIAL. — Loyalty Islands. MUSORSTOM 6, stn DW 422, 20°26.20’S- 166°40.31’E, 257 m, 16.II.1989 ,1 stem c. 20 mm high, holotype (MNHN-Hy.2009-0170).
ETYMOLOGY. — The specific name profunda refers to deep hydrothecae, the Latin “profundum” meaning deep. It is an adjective in feminine gender.
ECOLOGY AND DISTRIBUTION. — Acryptolaria profunda n.sp. was collected at a depth of 257 m in the Loyalty Islands.
DESCRIPTION
Stem basally truncate, 20 mm high ( Fig. 32F View FIG ), with only two short, alternate primary branches with a slight zigzag structure ( Fig. 23A, B View FIG ), obscure at the strongly polysiphonic basal part where the stem seems to be straight. Branches slightly widening at the point where the hydrotheca becomes free ( Fig. 23A, B View FIG ).
Hydrothecae alternately arranged in one plane ( Fig. 23A, B View FIG ), tubular, roughly cylindrical in the free portion ( Fig. 23 View FIG ); diameter decreasing at basal adnate part, minimum diameter at base. Hydrotheca strongly curved outwards, but distal part basically straight. Hydrotheca free over half of its adcauline length (adnate/free ratio 0.8). Adcauline wall convex at basal half, straight at distal half; proximal part of abcauline wall concave, but straight at distal half. Hydrothecal aperture circular, oblique and directed upwards, forming an angle of c. 30° with the long axis of branches. Some hydrothecae without renovations, but others with up to nine.
Large nematocysts relatively large and fusiform ( Fig. 30 View FIG ).
Coppinia not observed.
REMARKS
Acryptolaria profunda n. sp. has certain characters in common with A. laertesi n. sp. as for instance the general shape of the hydrothecae, though these are smaller in the latter and a larger proportion of the adcauline hydrothecal wall is adnate. Both species are also distinguishable by the size of the nematocysts, that are much larger in A. laertesi n. sp. (29.5 × 7.2 µm).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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