1The foraminifera
the Chuuk lagoon, and its value as teaching materials
南太平洋海域調査研究報告
No.53（of201３年２月）
OCCASIONAL PAPERS No.53（February 2013）

The foraminifera of the Chuuk lagoon,and its value as teaching materials
HATTA Akio
Faculty of Education, Kagoshima University
Abstract
Analysis of the recent foraminifera, which is distributed to the Chuuk lagoon in the Federated States ofMicronesia Chuuk state, and its practical use as teaching materials in education were considered.

Keyword: Chuuk lagoon, Recent foraminifera, teaching materials

The outline of investigation
Recent foraminifera in the Chuuk lagoon was studied with the cooperation of staffof the College of Micronesia (COM) in Chuuk. The obtained samples were treated
to distinguish living material from emptiness material with rose bengal, and driedsamples were taken out. The foraminifera was separated and judged at the laboratoryof Kagoshima University.
Track lagoon extraction point
The sample was extracted around three islands, Piis, Romanum, and Ueno Islandof the Chuuk lagoon island. Next, a sampling day, a place, the number of samples, andthe depth of sample are shown.
2011－8－5
One sample from near a guesthouse, near the shore of the northeast
part of Piis Island (1 m depth)
2011－8－6
Northeast of Island (From land to near reef) 1-4 (1 m depth)
2011－8－7
East of Island (From land to near reef) 1-4 (1 m depth)
2011－8－7
To Romanum Island
2011－8－8
From near shore of a guesthouse to near reef 1-3(1 m depth)
2011－8－9In mangrove near a guesthouse 1-2 (1 m depth)
2011－8－10
From near shore to near reef 1-5 (1 m depth)
2011－8－11
To Ueno Island
2011－8－11	From near TrukStop Hotel of Ueno Island 1-5, Depth of No.1 is 2m,
No.5 include much mud
2011－8－12 Beach sand near Blue Lagoon HotelForaminifera
The extracted foraminifers were taken photo with the biological microscope andthe clear pictures of the foraminifera were created by multi-in-focus image processing
technical software. Next, an extraction place and the feature of extracted foraminifera
are shown by photo.

2HATTA Akio

Figure 1 shows sea grass in shore of Piis Island.
Figure 2 is showing growth of beach rock in Piis Island. The materials of beachrock are dead coral and foraminifers.
Figure 3 shows the foraminifera which can check existence with the naked eye(Amphisorus & Homotorema).
Figure 4-a shows Amphisorus hemprichii with scale of a ball-point pen and its size is5.5mm.
Figure 4-b shows dry specimen. Figure 4-c is showing lateral side of A. hemprichii.
Amphisorus hemprichii Ehrenberg is showing the double row of drop shaped
apertures and several additional openings in the lateral side.
Figure 5-a, b, and c are showing Baculogypsina sphaerulata, Poroeponides lateralis, andCymbaloporetta squammosa.
Baculogypsina sphaerulata (Parker & Jones) was reported from the tropical Pacificregion. Poroeponides lateralis (Terquem) is very similar to Eponides repandus (Fichtel &Moll), but the distribution of supplementary apertures extends and the primary spiralumbilical canal is less distinct than that of Eponides repandus.
Cymbaloporetta squammosa (d’Orbigny) is characterized in having a vaulted dorsal
apex, in many cases colored purplish brown.
Figure 6-a, b, and c are showing Cymbaloporetta plana, C. Plana with a balloon
chamber, and Quinqueloculina spp.
Cymbaloporetta plana (Cushman) differs in having a longer trochospiral portion andan annular series of fewer chambers per whorl at the immature stage. A balloon
chamber grown at the mature stage of gamont generation.
Figure 7-a, b, and c are showing Peneroplis planatus, Spirolina acicularis, andGaudryina sp.
Peneroplis planatus (Fichtel & Moll) distinguish with the flattened specimens from P.
pertusus.
Spirolina acicularis (Batsch) is completely involute at the early stage and thechambers change from compressed to round in transverse section.
Practical use of the teaching materials in education
I introduce and propose to use foraminifera in biological education andenvironmental education with a clear picture of the foraminifera in this paper.
Moreover, I would like to propose to researchers and the staff of the College ofMicronesia (COM) about the construction of the simple breeding environment of living
foraminifera, and if possible, I would like to propose practice of the environmental
education through breeding and observation of recent foraminifera of the Chuuklagoon in the Federated States of Micronesia.
Acknowledgment
I have to thank the staff of the Research Center for the South Pacific of Kagoshima
University and the cooperation of Ms Yvonne Pangeliean of the Micronesia college(COM) Chuuk state.

3The foraminifera of the Chuuk lagoon, and its value as teaching materials

Fig. 1. Coast of a Piis island, sea grass stock.

Fig. 2. Formation of a beach lock.

4
HATTA AkioａｂFig. 3. F oraminifera which can check existence with the naked eye (Amphisorus(a)& Homotorema(b)).

abcabcFig. 4. A
 mphisorus hemprichii size=5.5mm (With scale of a ball-point pen (a); Dry
specimen (b); Lateral side(c)).

Fig. 5. B aculogypsina sphaerulata (a), Poroeponides lateralis (b), Cymbaloporetta squammosa (c).

abcFig. 6. Cymbaloporetta plana(a), C. Plana with a balloon chamber(b), Quinqueloculina spp.(c).

5The foraminifera of the Chuuk lagoon, and its value as teaching materials

abcFig. 7. Peneroplis planatus(a), Spirolina acicularis(b), Gaudryina sp.(c).

References
HATTA A. and UJIIE Hiroshi (1992): Benthic Foraminifera from Coral Seas between
Ishigaki and Iriomote Islands, Southern Ryukyu Island Arc, Northwestern Pacific.
Bull. College of Science, Univ. Ryukyus, No. 53, p.49-119, No. 54, p.163-287.
HOHENEGGER J. (2011): Large Foraminifera -Greenhouse constructions and gardeners
in the oceanic microcosm. Kagoshima Univ. Museum, Bull. No. 5, 81pp., 257
photographs, 8 figs.