Pseudotrachya amaza ( De Laubenfels, 1934 ),

Van, Rob W. M., 2017, Sponges of the Guyana Shelf, Zootaxa 1, pp. 1-225: 122-123

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/03A80010-772E-FFD6-FF14-A51A9250FD57

treatment provided by

Plazi

scientific name

Pseudotrachya amaza ( De Laubenfels, 1934 )
status

 

Pseudotrachya amaza ( De Laubenfels, 1934) 

Figures 75View FIGURE 75 a –d

Anomolissa amaza De Laubenfels, 1934: 17  .

Pseudotrachya hystrix sensu Van Soest & Stentoft 1988: 79  , pl. X fig. 1, text-fig. 38. (not: Trachya hystrix Topsent, 1892a  ) Pseudotrachya amaza  ; Lehnert & Van Soest 1999: 149, fig. 19; Boury-Esnault 2002: 218.

Material examined. RMNH Por. 9806, Guyana, ‘Luymes’ Guyana Shelf Expedition, station 65, 7.55°N 57.0833°W, depth 63 m, sandy bottom, 31 August 1970GoogleMaps  ; RMNH Por. 9991, Suriname, ‘ Snellius O.C.P.S. ’ Guyana Shelf Expedition, station E66, 7.1°N 56.1783°W, depth 65 m, Agassiz trawl, 13 May 1966GoogleMaps  .

Description. ( Fig. 75View FIGURE 75 a) Coarse, irregular massive to digitate sponges, with microconulose, hispid, faintly grooved surface. Several oscules are visible, approximately 3 mm in diameter. Size of largest specimen 8 x 4.5 x 4 cm. Color orange-brown in alcohol. Consistency firm.

Skeleton. Cortical-radiate, with 300–500 µm wide bundles of large styles traversing the choanosome and fanning out near the surface, carrying a dense 200 µm thick cortical palisade of small oxeas. Individual long styles penetrating up to 500 µm beyond the surface.

Spicules. ( Figs 75View FIGURE 75 b –d) Long and short styles/anisoxeas, oxeas.

Styles/anisoxeas, fusiform, with narrow rounded base and abruptly pointed ends, divided into two more or less distinct but slightly overlapping size categories, (1) larger ( Figs 75View FIGURE 75 b,b1), 1122– 1661 – 2298 x 28 – 41.5 –54 µm, and (2) smaller ( Figs 75View FIGURE 75 c,c1), 498– 663 –990 x 11 – 17.1 –26 µm.

Oxeas ( Figs 75View FIGURE 75 d), straight, sharply pointed, 102– 150 –198 x 3 – 4.8 –6 µm.

Distribution and ecology. Guyana Shelf, Puerto Rico, Barbados, Jamaica, sandy bottom at 25–100 m depth ( Guyana Shelf 63–65 m).

Remarks. The present specimens conform closely to previous descriptions. The larger stylote spicules are called oxeas or strongyloxeas by previous authors, because of their fusiform shape, but all are similar. The size categories in these spicules distinguished here are not mentioned by previous authors, but the overall range conforms closely in all descriptions.

RMNH

National Museum of Natural History, Naturalis

Kingdom

Animalia

Phylum

Porifera

Class

Demospongiae

Order

Hadromerida

Family

Polymastiidae

Genus

Pseudotrachya

Loc

Pseudotrachya amaza ( De Laubenfels, 1934 )

Van, Rob W. M. 2017
2017
Loc

Pseudotrachya hystrix sensu

Lehnert 1999: 149
Van 1988: 79
1999
Loc

Anomolissa amaza

De 1934: 17