Buchneria variabilis

From Species-ID
Jump to: navigation, search
Notice: This page is derived from the original publication listed below, whose author(s) should always be credited. Further contributors may edit and improve the content of this page and, consequently, need to be credited as well (see page history). Any assessment of factual correctness requires a careful review of the original article as well as of subsequent contributions.

If you are uncertain whether your planned contribution is correct or not, we suggest that you use the associated discussion page instead of editing the page directly.

This page should be cited as follows (rationale):
Hirose M (2012) Revision of the genus Buchneria (Bryozoa, Cheilostomata) from Japan. ZooKeys 241 : 1–19, doi. Versioned wiki page: 2012-11-12, version 28584, https://species-id.net/w/index.php?title=Buchneria_variabilis&oldid=28584 , contributors (alphabetical order): Pensoft Publishers.

Citation formats to copy and paste

BibTeX:

@article{Hirose2012ZooKeys241,
author = {Hirose, Masato},
journal = {ZooKeys},
publisher = {Pensoft Publishers},
title = {Revision of the genus Buchneria (Bryozoa, Cheilostomata) from Japan},
year = {2012},
volume = {241},
issue = {},
pages = {1--19},
doi = {10.3897/zookeys.241.3175},
url = {http://www.pensoft.net/journals/zookeys/article/3175/abstract},
note = {Versioned wiki page: 2012-11-12, version 28584, https://species-id.net/w/index.php?title=Buchneria_variabilis&oldid=28584 , contributors (alphabetical order): Pensoft Publishers.}

}

RIS/ Endnote:

TY - JOUR
T1 - Revision of the genus Buchneria (Bryozoa, Cheilostomata) from Japan
A1 - Hirose M
Y1 - 2012
JF - ZooKeys
JA -
VL - 241
IS -
UR - http://dx.doi.org/10.3897/zookeys.241.3175
SP - 1
EP - 19
PB - Pensoft Publishers
M1 - Versioned wiki page: 2012-11-12, version 28584, https://species-id.net/w/index.php?title=Buchneria_variabilis&oldid=28584 , contributors (alphabetical order): Pensoft Publishers.

M3 - doi:10.3897/zookeys.241.3175

Wikipedia/ Citizendium:

<ref name="Hirose2012ZooKeys241">{{Citation
| author = Hirose M
| title = Revision of the genus Buchneria (Bryozoa, Cheilostomata) from Japan
| journal = ZooKeys
| year = 2012
| volume = 241
| issue =
| pages = 1--19
| pmid =
| publisher = Pensoft Publishers
| doi = 10.3897/zookeys.241.3175
| url = http://www.pensoft.net/journals/zookeys/article/3175/abstract
| pmc =
| accessdate = 2021-12-03

}} Versioned wiki page: 2012-11-12, version 28584, https://species-id.net/w/index.php?title=Buchneria_variabilis&oldid=28584 , contributors (alphabetical order): Pensoft Publishers.</ref>

See also the citation download page at the journal.


Taxonavigation

Ordo: Cheilostomata
Familia: Bryocryptellidae
Genus: Buchneria

Name

Buchneria variabilis (Androsova, 1958) comb. n.Wikispecies linkPensoft Profile

  • Porella variabilis Androsova, 1958, 165, fig. 96; type locality, Moneron Island, northern Sea of Japan.

Material examined

Androsova’s type specimen (ZIN-1/3670) in Zoological Institute of the Russian Academy of Sciences (ZIN RAS), colony collected southwestern region of Sakhalin, Moneron Island (Kaibato), Sea of Japan, 36 m depth, (examined by micrographs); large erect colonies and fragments (NSMT Te-724 to Te-734; ZIHU 4130 and 4131), collected SE of Akkeshi Bay (42°48.37'N, 144°56.22'E) by M. Hirose from research boat Misago-maru, 6 July 2010, 116 m depth, by dredge; large erect colony and fragments (NSMT Te-790 to Te-794) collected SE of Akkeshi Bay (42°48.20'N, 144°55.43'E to 42°48.26'N, 144°54.91'E) by M. Hirose from research boat Misago-maru, 8 July 2011, 114−116 m depth, by dredge.

Measurements

ZL, 0.558−0.921 (0.751±0.101); ZW, 0.408−0.882 (0.611±0.088); n=25. OrL, 0.135−0.223 (0.189±0.019); OrW, 0.130−0.226 (0.192±0.023); n=27. OvL, 0.124−0.444 (0.247±0.072); OvW, 0.104−0.395 (0.214±0.056); n=44.

Description

Colony erect, rigid, robust, with thick, broad, strap-like branches at least 10 zooid widths across, or foliaceous, fan-shaped lobes; lobes or branches 0.86 to 8.04 cm wide (2.15±1.38 cm, n=25), multifurcate or irregularly lobed on distal margin; zooids open on both sides (Fig. 9). Broad lobes of some colonies are covered with conspicuous, closely spaced circular monticules (Fig. 9B). Autozooids oval, rounded hexagonal, or subrectangular in outline; strongly convex frontally, arranged in quincunx, zooecial borders indistinct; frontal shield tessellated, with four to eight areolar pores of irregular size along margin or offset more centrally (Fig. 10A, B). Orifice (Fig. 10C, D) semicircular, broader than long, slightly concave proximally, lyrula and condyles absent (Fig. 10D); deeply immersed with age. Oral spines lacking. Peristome deep, cormidial, formed by contributions of secondary calcification from distal and lateral zooids, with suture lines often evident between the sectors (Fig. 10E). Suboral avicularia approximately same size as orifice, located at margin of peristome; oval, with complete or incomplete pivot, rostrum slightly elevated distally, with a median tooth; mandible semicircular, directed proximally or proximolaterally (Fig. 10B, C). Rounded conical tooth on oral edge of avicularian rostrum conspicuous, projecting into secondary orifice (Fig. 10E). Hypertrophied suboral avicularia are frequent; often larger in area than orifice; distal end of rostrum elevated, pointed; rounded-triangular mandible directed proximally (Fig. 10B, C). I observed no other types of avicularia. Basal part of colony robust, composed of both interzooidal kenozooids and autozooids, borders indistinct. Ooecium imperforate, smooth, completely immersed by secondary calcification from the neighboring zooids, the proximal margin of the ooecium distinctly indented laterally and centrally, obscuring the distal edge of primary orifice in ovicellate zooids (Fig. 10E). Frontal budding frequent (Fig. 10F).

Distribution

Moneron Island, SW Sakhalin, 36 m depth (Androsova 1958[1]); off Akkeshi Bay, Hokkaido, 114–116 m depth (this study).

Remarks

My material matches Androsova’s (1958) description of Porella variabilis. She mentioned that the tooth on the proximal margin of the peristome is associated with the suboral avicularium, and that the tooth is present when the avicularium abuts the proximal margin of the peristome, but absent when the avicularium is offset proximally from the peristome. This is the case in all known species of Buchneria. Androsova (1958)[1] reported Buchneria variabilis from 36 m depth, shallower than my specimen from 114–116 m near Akkeshi. This apparent difference in the bathymetric distribution between Sakhalin and Akkeshi may be related to water temperature, as Sakhalin is more northern and colder than Akkeshi.
Buchneria variabilis differs from Buchneria teres and Buchneria rhomboidalis in colony form and in having larger suboral avicularia.

Taxon Treatment

  • Hirose, M; 2012: Revision of the genus Buchneria (Bryozoa, Cheilostomata) from Japan ZooKeys, 241: 1-19. doi

Other References

  1. 1.0 1.1 Androsova E (1958) Bryozoa of the Order Cheilostomata from the northern part of the Sea of Japan. Issledovaniya Dal'Nevostochnykh morei SSSR 5: 90-204.

Images