Stylatula diminutiva Williams and Matsumoto, 2015
publication ID |
https://doi.org/ 10.5281/zenodo.11512380 |
DOI |
https://doi.org/10.5281/zenodo.11512436 |
persistent identifier |
https://treatment.plazi.org/id/039C8788-FFAE-FFDC-2A68-261D915AFB31 |
treatment provided by |
Felipe |
scientific name |
Stylatula diminutiva Williams and Matsumoto |
status |
sp. nov. |
Stylatula diminutiva Williams and Matsumoto View in CoL , sp. nov.
Figures 1–9. View FIGURE View FIGURE View FIGURE View Figure 7 View FIGURE
SPECIES DIAGNOSIS.— Virgulariid pennatulaceans; mature colonies <65 mm long; number of polyps per polyp leaf 2–4; number of large sclerites comprising fan-shaped polyp leaf armature <7; sclerites three-flanged throughout.
MATERIAL EXAMINED.— HOLOTYPE: CASIZ 198016 ; Japan, Iwate Prefecture, Sanriku, Otsuchi Bay ; 39°20,710′N x 141°56,923′E; 44 m depth; 28 April 2009; collection number AKM 1414; collector Asako K. Matsumoto on board GoogleMaps R / V Yayoi with 1 m biological dredge; remarks – mud bottom inside bay, water temperature 9.6° C: one whole specimen preserved in 95% EtOH . PARATYPES: CASIZ 198017 ; same data as holotype . CASIZ 203514 ; Japan, Iwate Prefecture, Sanriku, east Otsuchi Bay ; approximate coordinates 39°24′ – 39°34′N, ca. 142°10′– 142°41′E; 118–120 m depth; 12 November 1993; collection number AKM 1627 (= 1618b); collector S. Ohta on board GoogleMaps R / V Tansei-maru KT 93–15 cruise, St. 01 with 1 m biological dredge; remarks – separated from AKM 1618a; one whole specimen fixed in formalin and preserved in 95% EtOH . OTHER MATERIAL (non-type): CASIZ 203513 ; same data as holotype .
DESCRIPTION.— The wet-preserve holotype measures 36 mm in length and 2. 5 mm at it widest point (across the second polyp pair from the terminal apex. The internal axis is thin and extends the length of the colony. It is cylindrical, round in cross section, and contains numerous surface pores, which are often narrow and elongated. The composition of the axis is that of radially-arranged, wedge-shaped columns of calcareous matter, as in other pennatulaceans ( Figs. 2 View FIGURE –4), which is similar to the axial structure of ellisellid gorgonians ( Bayer, 1956: 224). Of the approximately thirty-five pairs of polyp leaves that are distinguishable, nine of these at the upper end of the rachis are fully developed, have mature polyps and conspicuous fan-shaped basal armature. The other twenty-six polyp leaf pairs are incipient, or not fully mature, and are not separated from apex. Small, cross-like sclerites may also be present. Some sclerites may also have a short side branch ( Figs. 5 View FIGURE –6).
ETYMOLOGY.— The specific epithet is derived from the Late Latin, deminutivum (indicating small size); in reference to the miniature size of the colonies relative to those of other species in the genus.
DISTRIBUTION.— Otsuchi Bay, Iwate Prefecture, Japan; 44–120 m depth range.
VARIATION.— The polyp leaves that comprise a single pair can be arranged oppositely (as in the holotype CAS 198016) or sub-alternately (as in CAS 203513). The four entire specimens examined ranged in length from 36–60 mm.
R |
Departamento de Geologia, Universidad de Chile |
V |
Royal British Columbia Museum - Herbarium |
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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