Diadumene leucolena (Verrill, 1866)
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publication ID |
https://doi.org/ 10.26515/rzsi/v117/i1/2017/117280 |
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persistent identifier |
https://treatment.plazi.org/id/03B0191F-0204-A73D-FCE0-84EEF392FBFC |
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Felipe |
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scientific name |
Diadumene leucolena (Verrill, 1866) |
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Diadumene leucolena (Verrill, 1866) View in CoL , Figure 4 View Figure 4
Synonyms
Sagartia leucolena Verrill, 1866 (Original description) Cylista leuconela (Verrill, 1866)
Sagartia (Thoe) leucolena Verrill, 1866
Diadumene kameruniensis (Carlgren, 1927)
Material Examined: Five specimens were collected from the intertidal regions of Chouldari (Lat. 11°37.224’N; Long. 92°40.285’E), South Andaman on 9.I.2015. Registration No. ZSI/ ANRC GoogleMaps -13005.
Description: The pedal disc is well developed with 5.94 mm in diameter ( Figure 4a View Figure 4 ). Column is 15 mm length which is divisible into scapus and capitulum ( Figure 4b & d View Figure 4 ). The column appears smooth from a distance, but is studded with small dark bumps when looked at closely. The double stripes are prominently seen on the column ( Figure 4a & c View Figure 4 ). Mouth is present with prominent lips ( Figure 4e View Figure 4 ). The capitulum is smooth. The scapus is with cinclides ( Figure 4f View Figure 4 ). The tentacles are about 66 number, hexamerously arranged in four cycles (12+12+18+24 = 66) ( Figure 4a View Figure 4 ). The tentacles are long, tapered, numerous, more regularly arranged, which are not retractile ( Figure 4a View Figure 4 ). All of the inner tentacles are typically thicker than the outer tentacles ( Figure 4a View Figure 4 ). Acontia is well developed.The retractor muscles are observed ( Figure 6a View Figure 6 ). Gametogenic tissues are well observed ( Figure 6a &b View Figure 6 ). Parietobasilar and basilar muscles are weak ( Figure 6c View Figure 6 ).
The columns of the individuals observed in the field were slightly pinkish or salmon or orange in colour ( Figure 4a View Figure 4 ) and transparent with a tinge of green near the upper part of the column. The mesenteries were visible as 24 white double stripes on the column. The colour of tentacles are off white ( Figure 4a View Figure 4 ).
Cnidocysts
Cnidocyts contain spirocysts and nematocysts such as micro basic p-mastigophores, basitrichs and micro basic amastigophores were derived from various organs of D. leucolena ( Table 2) and all are illustrated in Figure 5 View Figure 5 .
Habitat: It is common to abundant along the bay margin, estuaries and sheltered waters, in fouling communities where it grows on oysters, rocks, seaweeds, pilings, and floats. It can also occur in sheltered tide pools, and is especially tolerant of variable salinities (Carlton 1979; Cohen and Carlton 1995).
The specimen reported here was found in mud flat area of shallow water occurring at depth of 1m.
Distribution: This Atlantic anemone, occurring from at least Cape Cod to South Carolina, was first reported from the Oakland estuary by Sander (1936), although it may have been present in the Bay since the 19 th century (Cohen and Carlton, 1995). Hand (1956) described it in detail from the Bay of central California. It was recorded from Atlantic coast oyster beds (Wells, 1961) as ship fouling or in ballast water. It has also been reported from southern California bays and from Coos Bay, Oregon (Carlton, 1979; Cohen and Carlton, 1995).
India: Chouldari, South Andaman.
Remark: New record to Indian waters
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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