Stylopoma varus Tilbrook, 2001

Martino, Emanuela Di & Taylor, Paul D., 2018, Early Pleistocene and Holocene bryozoans from Indonesia, Zootaxa 4419 (1), pp. 1-70 : 31

publication ID

https://doi.org/ 10.11646/zootaxa.4419.1.1

publication LSID

lsid:zoobank.org:pub:03CAFD21-185F-4C86-ACC3-8CEB61E7F7DD

DOI

https://doi.org/10.5281/zenodo.3799544

persistent identifier

https://treatment.plazi.org/id/CF6D87AA-E850-D250-FF7D-FF530EA9F849

treatment provided by

Plazi

scientific name

Stylopoma varus Tilbrook, 2001
status

 

Stylopoma varus Tilbrook, 2001 View in CoL

( Figs 86–88 View FIGURES 86–88 ; Table 19)

Stylopoma varus Tilbrook, 2001: 27 View in CoL , fig. 11A–C; Tilbrook, 2006: 192, pl. 40, figs E, F.

Figured material. RGM.1350565, Holocene, UPGG 041, off South Sulawesi.

Description. Colony encrusting, multiserial, multilaminar. Autozooids with distinct interzooidal furrows, irregularly arranged, polygonal, slightly longer than broad (mean L/W = 1.12). Frontal shield convex, granular, densely perforated; pseudopores circular, each set in a polygonal depression; marginal areolar pores larger and distinct; a central umbo visible in some zooids. Primary orifice wider than long (excluding sinus), transversely Dshaped, anter smooth, proximal edge straight with a narrow, U-shaped, median sinus; condyles denticulate, rectangular, occupying the majority of the proximal border on each side of the sinus. A single, small, adventitious avicularium located proximolateral of the orifice and distolateral directed; rostrum triangular, raised; crossbar complete. Sometimes additional, adventitious, oval avicularia, similar in size to those lateral to the orifice, are placed elsewhere on the frontal shield, randomly directed. Vicarious avicularia and complete ovicells not observed.

Remarks. A single colony of Stylopoma varus was found in our samples. This species was originally described from the South China Sea at about 50 m depth, and the Torres Strait (Tilbrook 2001), and subsequently found in the Solomon Islands ( Tilbrook 2006). Stylopoma varus is characterized by the presence of a central umbo on the frontal shield, and an abundance of frontal adventitious avicularia. However, in the small fragment available for study, the central umbo is unequivocally visible only in some of the zooids.

N, Number of colonies and number of zooids measured; SD, standard deviation.

RGM

National Museum of Natural History, Naturalis

Kingdom

Animalia

Phylum

Bryozoa

Class

Gymnolaemata

Order

Cheilostomatida

Family

Schizoporellidae

Genus

Stylopoma

Loc

Stylopoma varus Tilbrook, 2001

Martino, Emanuela Di & Taylor, Paul D. 2018
2018
Loc

Stylopoma varus

Tilbrook, K. J. 2006: 192
2006
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