Ircinia vansoesti, Kelly & Thacker, 2021

Kelly, Joseph B. & Thacker, Robert W., 2021, New shallow water species of Caribbean Ircinia Nardo, 1833 (Porifera: Irciniidae), Zootaxa 5072 (4), pp. 301-323 : 312-313

publication ID

https://doi.org/10.11646/zootaxa.5072.4.1

publication LSID

lsid:zoobank.org:pub:1D561060-A3A6-4F21-80B5-C393744349DB

DOI

https://doi.org/10.5281/zenodo.5749710

persistent identifier

https://treatment.plazi.org/id/D3C1295B-95FC-4DDB-A3EF-35B0C2EAF3A8

taxon LSID

lsid:zoobank.org:act:D3C1295B-95FC-4DDB-A3EF-35B0C2EAF3A8

treatment provided by

Plazi

scientific name

Ircinia vansoesti
status

sp. nov.

Ircinia vansoesti sp. nov.

Figures 10 View FIGURE 10 , 11 View FIGURE 11 ; Tables 1 View TABLE 1 , 2 View TABLE 2 .

urn:lsid:zoobank.org:act:D3C1295B-95FC-4DDB-A3EF-35B0C2EAF3A8

Holotype: USNM 1641998 View Materials (JK18x20; 16.8285, -88.1044; appx. 0.6 m depth; coll. J.B.K.; 16 August 2018). GoogleMaps

Paratypes: USNM 1641996 View Materials (JK18x18; 16.8285, -88.1044; appx. 0.6 m depth; coll. J.B.K.; 16 August 2018) GoogleMaps , USNM 1642006 View Materials (JK18x28; 16.8083, -88.1496; appx. 0.5 m depth; coll. J.B.K.; 18 August 2018) GoogleMaps , USNM 1642012 View Materials (JK18x34; 16.8083, -88.1496; appx. 0.5 m depth; coll. J.B.K.; 18 August 2018), USNM 1642013 View Materials (JK18x35; 16.8083, -88.1496; appx. 0.5 m depth; coll. J.B.K.; 18 August 2018).

Type locality: Mesoamerican Barrier Reef, Belize.

External morphology. Ircinia with a ramose growth form, although can be occasionally massive lobate in smaller individuals ( Figure 10 View FIGURE 10 ). This species is polymorphic with regard to pinacoderm coloration, and multiple color morphs (gray, dark red, dark green) can be found within a population. Possesses smaller conules (1–1.5 mm). Oscula typically 0.5–1.2 cm in diameter.

Interior morphology. Massive fascicular fibers 90–300 µm wide, sometimes cored, and always more heavily than interconnecting fibers. Interconnecting fibers 25–60 um wide, usually uncored ( Figure 11 View FIGURE 11 ). Irciniid filaments 2–6 µm wide terminating in spherical to tear-drop knobs measuring 4–11 µm in diameter. Foreign spicules and sediment are occasionally included in the cortex and are seldom found in the in mesohyl. Fascicles can be rare and difficult to discern from interconnecting secondary fibers ( Figure 11 View FIGURE 11 ).

Ecology. This species is found growing on Rhizophora prop roots.

Etymology. This species is named for the sponge researcher Rob van Soest.

Remarks. Interior morphology can vary somewhat depending on population, as the Twin Cays specimens contained less foreign inclusions relative to the Blue Ground specimens. Referred to as the ‘Sp. 1’ growth form in Kelly et al. (2021).

Kingdom

Animalia

Phylum

Porifera

Class

Demospongiae

Order

Dictyoceratida

Family

Irciniidae

Genus

Ircinia