Species of Acryptolaria Norman, 1875 (Cnidaria, Hydrozoa, Lafoeidae) collected in the Western Pacific by various French expeditions, with the description of nineteen new species Author Peña Cantero, Álvaro L. Instituto Cavanilles de Biodiversidad y Biología Evolutiva, Universidad de Valencia / Fundación General, Universidad de Valencia, Apdo. Correos 22085, E- 46071 Valencia (Spain) alvaro. l. pena @ uv. es pena@uv.es Author Vervoort, Willem National Museum of Natural History, P. O. Box 9517, NL- 2300 RA Leiden (The Netherlands) vervoort @ naturalis. nnm. nl text Zoosystema 2010 2010-06-30 32 2 267 332 http://www.bioone.org/doi/abs/10.5252/z2010n2a5 journal article 8099 10.5252/z2010n2a5 f76e17a3-3bc3-43a8-ae33-6655aba3fa57 1638-9387 4521008 Acryptolaria intermedia n. sp. ( Figs 12 ; 30 ; 31I ; Table 13 ) TYPE MATERIAL . — Norfolk Ridge. CHALCAL 2, stn DW 76, 23°40.50’S , 167°45.20’E , 470 m , 30.X.1986 , several stems, up to 24 mm high, from communal stolonal fibers: 1 stem holotype (MNHN-Hy.2009-0163) ; several stems paratype (RMNH-Coel. no. 31510). ETYMOLOGY. — The specific name “ intermedia ” refers to the presence of intermediate features between A. angulata and A. bulbosa ; it is an adjective in femine gender. ECOLOGY AND DISTRIBUTION. — Acryptolaria intermedia n. sp. was collected at a depth of 470 m in the Norfolk Ridge area. DESCRIPTION Stems up to 24 mm high ( Fig. 31I ). Branching irregular, but usually in one plane, and scarce, though branches up to third order are present. Branches straight or slightly sinuous ( Fig. 12A, B ), with anastomoses. Hydrothecae alternately arranged in one plane ( Fig. 12A, B ), tubular, roughly cylindrical, with a distinct decrease in diameter at their base ( Fig. 12 ). Hydrotheca curved twice: strongly outwards at distal part of adnate portion, becoming more or less perpendicular to adnate part, and markedly upwards consecutively, usually shortly after the adnate wall becomes free. Abcauline wall with a distinct inflexion point at about half its length, forming a shallow embayment at that point, accompanied by an internal perisarc cusp ( Fig. 12 ). Basal part of abcauline wall straight, parallel to branch; distal part slightly convex or straight too. Adcauline wall adnate for over half of its length (adnate/free ratio c. 1.7); adnate part convex; free part concave proximally becoming straight distally. Hydrothecal aperture circular, oblique and slightly directed upwards; rim even, sometimes with renovations. TABLE 13. — Measurements of Acryptolaria intermedia n. sp. from the holotype (in μm).

Range	Mean ± SD (n = 10)
Hydrothecae
Length of abcauline wall	490-600	547.5 ± 33.4
Length of adcauline wall	550-690	621.5 ± 39.2
Length of free adcauline wall	190-270	235.5 ± 24.1
Length of adnate adcauline wall	360-420	386.0 ± 18.1
Ratio adnate/free adcauline wall	1.4-1.9	1.7 ± 0.1
Diameter at aperture	95-110	102.5 ± 4.0
Nematocysts
Larger group	8.5-10 × 6-6.5	9.1 ± 0.4 × 6.1 ± 0.2
Ratio	1.4-1.5	1.48 ± 0.04
Smaller group	5.5 × 2.5

Large nematocysts relatively very small and spherical ( Fig. 30 ). Coppinia not observed. REMARKS At first glance, Acryptolaria intermedia n. sp. resembles A. bulbosa in the shape of the hydrothecae. Nevertheless they are clearly different species as the latter has bigger hydrothecae, much bigger nematocysts (20.7 × 6.7 µm ) and the internal perisarc cusp at the abcauline hydrothecal embayment is absent. In the size of the nematocysts, A. intermedia n. sp. is closer to A. angulata (15.9 × 8.6 µm ), but they differ in the shape and size of the hydrotheca; A. intermedia n. sp. lacks the characteristic sharp invagination of the adnate adcauline wall of A. angulata and has distinctly smaller hydrothecae (cf. Table 31 ). FIG. 12.— Acryptolaria intermedia n.sp. , from CHALCAL 2 stn DW 76: A , B , branch fragments showing hydrothecal arrangement and hydrothecae; C , D , hydrothecae. Scale bar: 250 μm. Above, when dealing with A. bulbosa , we have indicated that material described either as A. rectangularis (cf. Gravier-Bonnet 1979; Millard 1967 , 1968 ) or as A. angulata (cf. Hirohito 1995) could belong to A. bulbosa or to A. intermedia n. sp. but that it is necessary to study the cnidome to properly identify this material.