Trikentrion catalina
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Ordo: Poecilosclerida
Familia: Raspailiidae
Genus: Trikentrion
Name
Trikentrion catalina (Sim & Bakus, 1986) – Wikispecies link – Pensoft Profile
- Cyamon catalina Sim and Bakus 1986[1]: 18, fig. 4; Lee et al. 2007[2]: 211 (California).
- Not: Trikentrion catalina; Gómez et al. 2002[3] = Trikentrion helium.
Material examined
Holotype USNM 33631, preserved in alcohol, California, Santa Catalina Island, Bird Rock, 33.45°N, 118.4833°W, on rocky cliff at 50 m depth, coll. K. McCleneghan.
Not examined: paratype BMNH 1985 (reg. nr. unknown), Santa Catalina Island, Ship Rock, on rock at 46 m depth, coll. R. Given.
Description
Flabelliform sponge (Fig. 25A), measuring 15 × 8 by 0.4 cm, attached to rocks by a 3 × 0.6 cm stalk. Surface hispid. No oscules apparent. Consistency firm and leathery. Color reddish orange (alive), pale beige (alcohol).
Skeleton (Fig. 25B): choanosome densely packed with three-claded polyactines; ectosome with long, relatively thick styles surrounded by dense bouquets of short thin styles; trichodragmata commonly observed especially in the peripheral parts.
Spicules: long (thin) styles, short thin styles, polyactines, trichodragmas.
Long (thin) styles (Fig. 25C), usually broken and only a few could be measured: 1400–5400 × 8–40 µm, so not really thin.
Short thin styles (Fig. 25D), 130–611.3–730 × 3–5.6–8 µm,
Polyactines (Figs 25E, E1), predominantly three-claded, with spined shorter basal cladi (Fig. 25E1), occasionally with few or no spines on the basal cladi, and smooth, longer, relatively pointed lateral cladi; occasionally four-claded; size basal cladi 78–98.7–126 × 16–25.3–31 µm, lateral cladi 156–197.7–236 × 18–24.4–29 µm.
Trichodragmas: straight, with lightly spined raphides (Figs 25F, F1), 63–79.3–88 × 7–10.2–13 µm.
Distribution
Santa Catalina Island, Southern California.
Ecology
On rocks, from 46–50 m depth.
Discussion
This species is assigned to Trikentrion, because of the flabellate shape resembling Trikentrion flabelliforme Hentschel (1912)[4], the sagittal polyactines, three-claded with spines only on the basal cladus, and the possession of trichodragmas. It is similar to Trikentrion helium in the lack of genuine choanosomal oxeas, and the short basal cladi of the polyactines. Remarkably, when describing Trikentrion catalina, Sim & Bakus (1986) did not notice - they did not discuss Trikentrion helium - the similarities with their species. Specimens assigned to Trikentrion catalina by Gómez et al. (2002)[3] are considered to be long to Trikentrion helium (see above).
Taxon Treatment
- Soest, R; Carballo, J; Hooper, J; 2012: Polyaxone monaxonids: revision of raspailiid sponges with polyactine megascleres ( Cyamon and Trikentrion) ZooKeys, 239: 1-70. doi
Other References
- ↑ Sim C, Bakus G (1986) Marine sponges of Santa Catalina Island, California. Occasional Papers of the Allan Hancock Foundation 5: 1-23.
- ↑ Lee W, Elvin D, Reiswig H (2007) The sponges of California. A guide and key to the marine sponges of California. Monterey Bay Sanctuary Foundation, Monterey, CA, USA, × + 130 + P266.
- ↑ 3.0 3.1 Gómez P, Carballo J, Vazquez L, Cruz J (2002) New records for the sponge fauna (Porifea: Demospongiae) of the Pacific coast of Mexico (eastern Pacific Ocean). Proceedings of the Biological Society of Washington 115 (1): 223-237.
- ↑ Hentschel E (1912) Kiesel- und Hornschwämme der Aru- und Kei-Inseln. Abhandlungen herausgegeben von der Senckenbergischen naturforschenden Gesellschaft 34 (3): 293-448.
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