Acryptolaria profunda, Peña Cantero & Vervoort, 2010

Peña Cantero, Álvaro L. & Vervoort, Willem, 2010, Species of Acryptolaria Norman, 1875 (Cnidaria, Hydrozoa, Lafoeidae) collected in the Western Pacific by various French expeditions, with the description of nineteen new species, Zoosystema 32 (2), pp. 267-332 : 312-314

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).

Kingdom

Animalia

Phylum

Cnidaria

Class

Hydrozoa

Order

Leptothecata

Family

Lafoeidae

Genus

Acryptolaria

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