Mycale (Zygomycale) angulosa (Duchassaing & Michelotti, 1864),

Van, Rob W. M., 2017, Sponges of the Guyana Shelf, Zootaxa 1, pp. 1-225: 162-163

publication ID

http://doi.org/ 10.5281/zenodo.272951

publication LSID

lsid:zoobank.org:pub:6D68A019-6F63-4AA4-A8B3-92D351F1F69B

persistent identifier

http://treatment.plazi.org/id/03A80010-77F6-FF0E-FF14-A3B2937CFBAF

treatment provided by

Plazi

scientific name

Mycale (Zygomycale) angulosa (Duchassaing & Michelotti, 1864)
status

 

Mycale (Zygomycale) angulosa (Duchassaing & Michelotti, 1864) 

Figures 101View FIGURE 101 a –j

Restricted synonymy:

Pandaros angulosa Duchassaing & Michelotti, 1864: 89  , pl. IX fig. 4.

Zygomycale parishi  ; De Laubenfeld 1956: 3 (Not: Rhaphiodesma parishi Bowerbank, 1875  ) Mycale (Aegogropila) angulosa  ; Van Soest 1984: 16, pl. I figs 5–6, text-fig. 3 (with additional synonyms). Mycale (Zygomycale) angulosa  ; Van Soest & Hajdu 2002: 688; Muricy et al. 2011: 158.

Material examined. RMNH Por. 9947, Suriname, ‘ Snellius O.C.P.S. ’ Guyana Shelf Expedition, station F46, 6.312°N 56.57°W, depth 25–29 m, bottom sand, 7 May 1966GoogleMaps  .

Description. Irregularly ramose ( Fig. 101View FIGURE 101 a), with shorter or longer partially creeping branches, 3 cm or more in length, 0.5–1 cm in diameter, forming masses of up to 4 x 4 x 2 cm. Color in alcohol pale brown. Surface irregular, covered with small lobes occasionally bearing small oscules (<1 mm). Consistency soft to slightly firm.

Skeleton. The surface skeleton ( Fig. 101View FIGURE 101 b) is of the Aegogropila  type, with tangentially intercrossing spicule tracts of 30–90 µm in diameter containing 7–12 spicules in cross section. Anisochelae I form rosettes. Choanosomal skeleton irregularly reticulate, with strong spicule tracts of 150–200 µm in diameter.

Spicules. ( Figs 101View FIGURE 101 c –j) Styles, anisochelae, isochelae, sigmas, toxas, trichodragmas.

Styles ( Figs 101View FIGURE 101 c,c1), fusiform, tapering gradually to rounded and pointed opposite ends, no obvious constriction or tyle, size 294– 316 –342 x 8 – 9.3 –11 µm.

Anisochelae, in two distinct size categories, (1) anisochelae I ( Fig. 101View FIGURE 101 d), robust, with long free shaft and short lower alae, 47– 51.1 –59 µm, and (2) anisochelae II ( Fig. 101View FIGURE 101 e), robust, with short free shaft and long upper alae, 18– 21.7 –26 µm.

Isochelae ( Fig. 101View FIGURE 101 f), uniform in shape and size, thin, elongate, 11– 12.2 –14 µm.

Sigmas in two size categories, (1) large, robust ( Fig. 101View FIGURE 101 g), 74– 82.2 –92 µm, and (2) small, thin (rare) ( Fig. 101View FIGURE 101 h), 30– 34.0 –36 µm.

Toxas ( Fig. 101View FIGURE 101 i), with shallow curve and upturned apices, occurring in toxodragmas ( Fig. 101View FIGURE 101 i1), length 25– 63.8 –84 µm, dragmas 5–7 µm in thickness.

Trichodragmas ( Fig. 101View FIGURE 101 j), 24– 33.1 – 42 x 6 – 7.7 –9 µm.

Distribution and ecology. Guyana Shelf, Virgin Islands, Cuba, Jamaica, Curaçao, NE Brazil, in mangroves, bays and on soft bottoms at 1–58 m depth ( Guyana Shelf 25–29 m).

Remarks. Shape and spicule sizes match closely with previous descriptions of this common species. A similar sister species, M. (Z.) sierraleonensis Van Soest, Beglinger & De Voogd, 2014  , was recently described from Sierra Leone in the East Atlantic. It spicules are almost identical in shape and size, but it has a third size category of sigmas. The present specimen confirms this difference.

RMNH

National Museum of Natural History, Naturalis

Kingdom

Animalia

Phylum

Porifera

Class

Demospongiae

Order

Poecilosclerida

Family

Mycalidae

Genus

Mycale

Loc

Mycale (Zygomycale) angulosa (Duchassaing & Michelotti, 1864)

Van, Rob W. M. 2017
2017
Loc

Rhaphiodesma parishi

Bowerbank 1875
1875
Loc

Pandaros angulosa

Duchassaing & Michelotti 1864: 89
1864