Mycale carlilei Lehnert, Stone & Heimler, 2006, sp. nov.

• Main Authors: Lehnert, Helmut, Stone, Robert, Heimler, Wolfgang
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2006
• Subjects: Biodiversity; Taxonomy; Animalia; Porifera; Demospongiae; Poecilosclerida; Mycalidae; Mycale; Mycale carlilei; Alaska; Aleutian Islands
• Online Access: https://doi.org/10.5281/zenodo.6263589; http://treatment.plazi.org/id/03C887BAFFBAD741FED5B8A27E02D548

Mycale carlilei sp. nov. (Figs 7 a–f) Material Holotype, deposited at the National Museum of Natural History, Washington, D.C., U.S.A. under the registration number USNM 1082470 (51°40’42.2’’N, 176°15’39.5’’W, 7.2 km south of Ragged Point on Kagalaska Island, 150 m depth). Two paratypes are deposited at the Auke Bay Laboratory Museum, Juneau, Alaska, U.S.A. under the registration numbers: AB­05­82 (51°55’5.5’’N, 175°17’37.6’’W, approximately 12 km south of Cape Kigun, Atka Island, 112 m depth), and AB­05­81 (51°40’40’’N, 176°16’15.5’’W, 7.3 km south of Ragged Point on Kagalaska Island, 156 m depth). Additional material: 6221­2B­7 (51°54’49.1’’N, 173°53’8.3’’W, 25.7 km southeast of the west end of Amlia Island, 119 m depth). Description Light brown, cylindrical, stalked sponge (Figs. 7 a, b). Consistency very soft, except for the wiry stalk. Surface smooth. The holotype is attached to a cobble with a stalk, ca. 2 cm in diameter. Other specimens have been observed in situ attached to pebbles, boulders, and bedrock. The sponge widens from the stalk upwards into a cylindrical body with a diameter of 7 cm. The sponge reaches a maximum height of ca. 45 cm, a second stubby cylinder branches off the main cylinder (Figs. 7 a, b) at about two thirds the height of the main cylinder. We have observed specimens in situ with up to four additional cylinders or branches. Skeleton. The stalk consists of longitudinally arranged masses of tylostyles, no individual tracts are recognizable. There is no special ectosome developed. The choanosome consists of irregularly arranged pauci­ and polyspicular tracts of tylostyles with masses of sigmas and very abundant anisochelae, single and in rosettes. Spicules. Tylostyles (Fig. 7 c) measure 470–520 x 10–14 µm, anisochelae (Figs. 7 d, e), 55–75µm, sigmas (Figs. 7 f), 65–80 µm. Distribution Known from the type­localities and observed from the submersible Delta at several other locations in the Central Aleutian Islands at depths between 82 and 260 m. Judging from observations made from the ...