Orthopyxis crenata ( Hartlaub, 1901b )

Galea, Horia R., Häussermann, Verena & Försterra, Günter, 2009, New additions to the hydroids (Cnidaria: Hydrozoa) from the fjords region of southern Chile, Zootaxa 2019, pp. 1-28 : 19-22

publication ID

https://doi.org/ 10.5281/zenodo.186052

DOI

https://doi.org/10.5281/zenodo.6212462

persistent identifier

https://treatment.plazi.org/id/525D4C3A-FFFB-FF90-A285-EE2DFAD50BF3

treatment provided by

Plazi

scientific name

Orthopyxis crenata ( Hartlaub, 1901b )
status

 

Orthopyxis crenata ( Hartlaub, 1901b) View in CoL

(fig. 4N–U, table 7)

Eucopella crenata Hartlaub, 1901b: 364 View in CoL , pl. 22 figs 27–31, 33–35. – Hirohito, 1969: 7, fig. 7.

Campanularia crenata View in CoL – Millard & Bouillon, 1973: 47, fig. 6 B–F. – Millard, 1975: 204, fig. 68A–F. – García Corrales et al., 1978: 19, fig. 7. – Hirohito, 1995 (English text): 53, fig. 15E–K.

Orthopyxis crenata View in CoL – Bale, 1924: 232, fig. 3. – Ralph, 1957: 838, fig. 6G–V. – Leloup, 1974: 17, fig. 15. – Cornelius, 1982: 58, fig. 5. – Watson, 2005: 589, fig. 34A–C.

Campanularia View in CoL ? crenata View in CoL – Millard, 1958: 170, fig. 2A–C, E.

Orthopyxis crenata View in CoL f. crenata Ralph, 1957: 838 View in CoL , fig. 6G–P, V.

Orthopyxis crenata View in CoL f. subtropica Ralph, 1957: 839, fig. 6Q–U.

Orthopyxis formosa Trebilcock, 1928: 2 View in CoL , pl. 1 fig. 2.

Orthopyxis delicata Trebilcock, 1928: 3 View in CoL , pl. 2 fig. 1– 1F. – Ralph, 1957: 840, fig. 7A–D.

Campanularia delicata View in CoL – Millard & Bouillon, 1973: 48, fig. 6G–M. – García Corrales et al., 1978: 22, fig. 8.

Campanularia View in CoL ? delicata View in CoL – Millard, 1975: 206, fig. 68G–L.

? Campanularia caliculata View in CoL – Hartlaub, 1905: 560, fig. K1 (not Campanularia caliculata Hincks, 1853 View in CoL ).

Material examined. Stn. 10 – 24.02.2008, A501 ( MHNG INVE 62831) (9 m): numerous hydrothecae and female gonothecae, on red algae, and a sterile colony epizoic on Thuiaria polycarpa Kirchenpauer, 1884 ; A522 ( MHNG INVE 62832) (8 m): numerous hydrothecae and a few gonothecae, epizoic on T. polycarpa .

Type locality. French Pass, Bare Island, New Zealand.

Description. Sample A501. Colony arising from flattened, ramified, anastomozing stolon. Pedicels of hydrothecae with moderately thick perisarc, ranging from slightly undulated to spirally grooved throughout. Hydrothecae bell-shaped, rounded in cross-section, perisarc thin, except basally where it forms an internal annular constriction for the attachment of hydranth; margin slightly flared, rim smooth though wavy to obviously crenate, with ca. 12 bluntly rounded marginal cusps, commonly varying in shape within the same colony; subhydrothecal spherule present. Gonothecae, female in present material, borne on stolon, laterally flattened; ovoid in frontal view, with distal end truncated, wider in middle, and narrowing basally into distinct, short, smooth pedicel. Two gonophores per gonotheca: one large, occupying nearly the whole lumen of gonotheca, and a smaller one, situated basally. Large gonophore with ca. 100–120 densely-packed eggs, arranged in about 8 outer and 5 inner longitudinal rows, each with 9– 10 eggs; the latter, polygonal to ovoid, up to 210 µm in larger diameter. Small gonophore with several tens of comparatively smaller eggs (45 µm), in a compact, oval mass. Additional, fine structures could not be observed. Male gonothecae not seen. Nematocysts (undischarged): large capsules (9.6–12.1) × (2.8–3.7) µm, small capsules (5.0–5.7) × (1.4–1.6) µm.

Remarks. Ralph (1967) distinguished two forms of this species, i.e. O. crenata f. crenata , with margins of hydrothecae ranging from smooth to shallowly scalloped within the same colony, and O. crenata f. subtropica, with margin always possessing 12–14 well defined, low, rounded cusps.

Hirohito (1969, 1995) described newly released medusoids as having 4 radial canals, 8 statocysts, a broad velum, and no manubrium.

The specimens from Smyth Channel, Chile, provisionally assigned to C. caliculata Hincks, 1853 by Hartlaub (1905) have hydrothecae with an even to shallowly cusped rim, and most probably belong to the present species, as indeed noticed by Hartlaub.

As stated by Cornelius (1982), if the present species has to be referred to the genus Campanularia Lamarck, 1816 , another specific name would be required to avoid homonymy with C. crenata Allman, 1876 .

World distribution. Mediterranean, eastern and western Atlantic and Pacific, Indian Ocean (Hirohito 1995).

Records from Chile. Smyth Channel ( Hartlaub 1905), South of Chiloé Island (present study).

MHNG

Museum d'Histoire Naturelle

Kingdom

Animalia

Phylum

Cnidaria

Class

Hydrozoa

Order

Leptothecata

Family

Campanulariidae

Genus

Orthopyxis

Loc

Orthopyxis crenata ( Hartlaub, 1901b )

Galea, Horia R., Häussermann, Verena & Försterra, Günter 2009
2009
Loc

Campanularia

Millard 1975: 206
1975
Loc

Campanularia crenata

Garcia 1978: 19
Millard 1975: 204
Millard 1973: 47
1973
Loc

Campanularia delicata

Garcia 1978: 22
Millard 1973: 48
1973
Loc

Campanularia

Millard 1958: 170
1958
Loc

Orthopyxis crenata

Ralph 1957: 838
1957
Loc

Orthopyxis crenata

Ralph 1957: 839
1957
Loc

Orthopyxis formosa

Trebilcock 1928: 2
1928
Loc

Orthopyxis delicata

Ralph 1957: 840
Trebilcock 1928: 3
1928
Loc

Orthopyxis crenata

Watson 2005: 589
Cornelius 1982: 58
Leloup 1974: 17
Ralph 1957: 838
Bale 1924: 232
1924
Loc

Campanularia caliculata

Hartlaub 1905: 560
1905
Loc

Eucopella crenata

Hartlaub 1901: 364
1901
GBIF Dataset (for parent article) Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF