DEMOSPONGIAE Sollas, 1885

Morozov, Grigori, Sabirov, Rushan & Zimina, Olga, 2019, Sponge fauna of the New Siberian Shoal: biodiversity and some features of formation, Journal of Natural History 52 (47 - 48), pp. 2961-2992 : 2963-2965

publication ID

https://doi.org/ 10.1080/00222933.2018.1554166

publication LSID

lsid:zoobank.org:pub:FA2EDE40-93E0-43B7-9ACF-ECCE12B0E671

persistent identifier

https://treatment.plazi.org/id/03CC87D7-DE68-FFB3-F7B9-9076FE95C0E0

treatment provided by

Felipe

scientific name

DEMOSPONGIAE Sollas, 1885
status

 

Class DEMOSPONGIAE Sollas, 1885 View in CoL

Subclass HETEROSCLEROMORPHA Cárdenas, Pérez, and Boury-Esnault (2012) View in CoL Order POECILOSCLERIDA Topsent, 1928 View in CoL Family MYCALIDAE Lundbeck, 1905 View in CoL

Genus Mycale Gray, 1867 View in CoL

Mycale (Carmia) helios ( Fristedt, 1887) View in CoL

( Figure 2 View Figure 2 (a – e))

Esperia helios Fristedt 1887, p. 450 View in CoL – 451; pl. 25, figs 25 – 29; Lambe 1895, p. 117; pl. II, fig. 4a – c

Mycale helios: Hentschel 1929, p. 931 View in CoL ; Koltun 1959, p. 58 – 59

Description

( Figure 2 View Figure 2 (a)) Sponge of more or less roundish form, up to 5.5 cm in diameter. The consistency is soft and compressible, but not strong in tension. The surface is slightly shaggy, sometimes with numerous elongated (up to 2 cm in height) and flattened projections. Colour ash grey. Two specimens examined.

Skeleton

( Figure 2 View Figure 2 (b)) The main skeleton consists of longitudinal and branching multispicular fibres, connected by single spicules crossed at right angles. All spaces in between filled by densely packed sigmas and chelae. These form a structure of rosette shapes. Surface skeleton with protuberances of spicules arranged in plumose manner.

Spicules

( Figure 2 View Figure 2 (c – e)) Styles straight or slightly curved at basal end, rather short-pointed, dimensions: 221.7 – 372 – 448.1 (n = 30) × 11 – 13.8 – 15.8 (n = 20) µm; palmate anisochelaes,

dimensions: 50.2 – 55.3 – 60 (n = 15) µm; sigmas, both c- and s-shaped, dimensions: 26.3 – 31 – 36.2 (n = 15) µm.

Distribution

North of New Siberian islands (st. A-20, A-33), East Siberian Sea, Chukchi Sea (Pitlekai), Beaufort Sea, Behring Strait and Behring Sea, Sea of Okhotsk (northern part), Sea of Japan (the Olga gulf) . Depth range 22 – 62 m.

Remarks

Mycale helios , together with some other North Pacific species mentioned in this study (e.g. Polymastia rara ), is a shallow-water form whose westernmost distribution limit within the Eurasian Arctic is apparently defined by the area of the New Siberian Islands. In contrast, the eastern border of the distribution range of some North Atlantic (e.g. Mycale (Mycale) lingua (Bowerbank 1866) , Stylocordyla borealis (Lovén 1868)) and Arctic (e.g. Polymastia thielei Koltun 1964 , Thenea valdiviae Lendenfeld 1907 , Lycopodina cupressiformis ( Carter, 1874) , Geodia hentscheli Cárdenas, Rapp, Schander, Tendal 2010 ) species is confined to the same area.

The question of the existence of a New Siberian barrier that prevents the spread of western and eastern Arctic faunas has been intensively discussed since the middle of the twentieth century. It has been suggested that these range disjunctions are related to the environmental differences between the eastern and western Arctic during the Pleistocene glacial period (for details, see Mironov and Dilman 2008).

Kingdom

Animalia

Phylum

Porifera

Class

Demospongiae

Loc

DEMOSPONGIAE Sollas, 1885

Morozov, Grigori, Sabirov, Rushan & Zimina, Olga 2019
2019
Loc

Mycale helios: Hentschel 1929 , p. 931

Koltun VM 1959: 58
Hentschel E 1929: 931
1929
Loc

Esperia helios

Fristedt K 1887: 450
1887
Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF