Acryptolaria novaecaledoniae, 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 : 308-310

publication ID

https://doi.org/ 10.5252/z2010n2a5

DOI

https://doi.org/10.5281/zenodo.4551918

persistent identifier

https://treatment.plazi.org/id/03E5636A-FFB5-FF88-FF4F-5248772AFE5B

treatment provided by

Felipe

scientific name

Acryptolaria novaecaledoniae
status

sp. nov.

Acryptolaria novaecaledoniae View in CoL n. sp.

( Figs 21 View FIG ; 30 View FIG ; 32E View FIG ; Table 22)

TYPE MATERIAL. — Loyalty Islands. MUSORSTOM 6, stn DW 422, 20°26.20’S, 166°40.31’E, 257 m, 16.II.1989, many stems up to 55 mm high, on coral. Of this lot 1 48 mm high colony, holotype (MNHN-Hy.2009-0169) GoogleMaps ; 1 50 mm high stem, paratype ( MNCN 2.03 About MNCN /426) ; the remaining colony and fragments, paratype (RMNH-Coel. no. 31522).

OTHER MATERIAL EXAMINED. — Loyalty Islands. MUSORSTOM 6, stn DW 398, 20°47.19’S, 167°05.65’E, 370 m, 13.II.1989, a few stem fragments up to 60 mm long (MNHN-Hy.2009-0204).

Norfolk Ridge. CHALCAL 2, stn DW 78, 23°41.30’S, 167°59.60’E, 233-360 m, 30.X.1986, 2 stems up to 35 mm high, on coral (MNCN 2.03/427).

SMIB 4, stn DW 51, 23°41.3’- 23°40.5’S, 168°00.6’- 168°00.7’E, 245-260 m, 9.III.1989, 2 fragments up to 25 mm long (MNHN-Hy.2009-0202). — Stn DW 53, 23°40.1’- 23°39.5’S, 167°59.9’- 168°00.3’E, 250-270 m, 9.III.1989, 2 stems and 2 fragments up to 47 mm high (MNHN-Hy.2009-0203).

SMIB 5 , stn DW 70, 23°40.6’S, 168°01.1’E, 270 m, 7.IX.1989 ,3 stems up to 24mm high ( MNCN 2.03 About MNCN /428).— GoogleMaps Stn DW 71, 23°41.3’S, 168°00.7’E, 265 m, 7.IX.1989, 1 stem c. 17 mm high (MNHN-Hy.2009-0205). — GoogleMaps Stn DW 76, 23°41.2’S, 168°00.5’E, 280 m, 7.IX.1989, a few fragments up to 28 mm long (MNHN-Hy.2009-0206); a stem c. 15 mm high in slide ( MNCN 2.03 About MNCN /400). — GoogleMaps Stn DW 78, 23°40.8’S, 168°00.2’E, 245 m, 7.IX.1989, 3 fragments up to 7 mm long ( MNCN 2.03 About MNCN /429). — GoogleMaps Stn DW 101, 23°21.2’S, 168°04.9’E, 270 m, 14.IX.1989, 2 stems up to 30 mm high ( MNCN 2.03 About MNCN /430) GoogleMaps .

ETYMOLOGY. — The specific name novaecaledoniae refers to the New Caledonia region where it was found. The species name is a noun in female genitive.

ECOLOGY AND DISTRIBUTION. — Acryptolaria novaecaledoniae n. sp. was taken in the Norfolk Ridge area and near the Loyalty Islands, where it was collected at depths between 233 and 370 m. It occurred epibiotic on corals.

DESCRIPTION

Stems up to 60 mm high, strongly polysiphonic. Branching frequent (up to fourth-order branches observed) and irregular, but more or less in one plane ( Fig. 32E View FIG ), sometimes with anastomoses; branches straight ( Fig. 21A View FIG ).

Hydrothecae alternately arranged, approximately in one plane ( Fig. 21A View FIG ), mostly cylindrical ( Fig. 21 View FIG ); diameter only decreasing at their base. Hydrotheca strongly curved outwards, free part initially more or less perpendicular to adnate basal part, but eventually slightly turned upwards. As a consequence, the adcauline hydrothecal wall is convex in its adnate basal part and moderately concave in its free portion. Abcauline wall straight or slightly convex over basal third, followed by a strongly marked inflection point (sometimes forming a shallow embayment), to run straight or convex over its remaining length.Hydrotheca adnate for slightly over half of its adcauline length (adnate/free ratio 1.2); aperture circular, oblique, upwardly directed. Rim even, frequently with several short renovations ( Fig. 21A, D View FIG ).

Large nematocysts relatively small and bananashaped ( Fig. 30 View FIG ).

Coppinia not observed.

REMARKS Acryptolaria novaecaledoniae n. sp. is certainly close to A. inversa n. sp.; the nematocysts in both species are of the same size. Nevertheless, they are distinguishable by the degree of branching, that is scarce in A. inversa n. sp. and frequent in A. novaecaledoniae n. sp., but especially by the shape of the hydrothecae which in A. novaecaledoniae n. sp. are never directed downwards and are deprived of the peculiar abcauline hump so characteristic of A. inversa n. sp. Moreover, A. inversa n. sp. has longer hydrothecae with a much longer free proportion.

Kingdom

Animalia

Phylum

Cnidaria

Class

Hydrozoa

Order

Leptothecata

Family

Lafoeidae

Genus

Acryptolaria

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