Clathrina panis, (HAECKEL, 1872)

Klautau, Michelle & Valentine, Clare, 2003, Revision of the genus Clathrina (Porifera, Calcarea), Zoological Journal of the Linnean Society 139 (1), pp. 1-62 : 31

CLATHRINA PANIS ( HAECKEL, 1872)

Original name: Ascandra panis Haeckel, 1872

Type locality: Atlantic coast of North America (Florida, Agassiz ) .

Type: PMJ. Inv. Nr. Porif. 152 (syntype /alcohol) . Florida, North America .

Citations: Thacker (1908); Dendy & Row (1913); Tanita (1942).

Colour: Preserved specimen is white.

Description: Almost spherical, formed of irregular and loosely anastomosed tubes. Sediment is present inside the cormus. A large tube (pseudoatrium) can also be found inside the cormus.

Triactines ( Fig. 24A ), tetractines ( Fig. 24B ) and a few diactines form the skeleton. Triactines and tetractines are equiangular and equiradiate and their actines are conical and a little undulated, with sharp tips. The apical actine of the tetractines is a little shorter, thinner, conical, smooth and straight, and it is projected to the interior of the tubes. Tetractines are less abundant than triactines. There are very few diactines. They are fusiform and penetrate the surface of the sponge.

Length (Mm) Width (Mm)

Triactines 137.5 162.0 ± 11.3 180.0 15.5 ± 1.5 30 Tetractines 135.0 159.8 ± 11.5 180.0 14.5 ± 1.3 30 Apical 105.0 156.8 ± 22.8 187.5 9.5 ± 1.8 17 actine

Diactines 285.6 474.3 ± 184.6 1122.0 29.6 ± 19.4 20

Length (Mm) Width (Mm)

Triactines 90.0 129.3 ± 16.7 160.0 9.7 ± 1.1 15

According to the original description the micrometry is:

Figures

Figure 24. Clathrina panis. A, triactines. B, tetractines. Scale bar = 100 Mm.