Monoserius pennarius (Linnaeus, 1758)

Chakraborty, Oishinee & Raghunathan, C., 2020, Notes on seven Aglaopheniids (Cnidaria: Hydrozoa: Aglaopheniidae) from Andaman and Nicobar Islands with three new records to India, Zootaxa 4790 (2), pp. 291-317 : 305-306

publication ID

https://doi.org/ 10.11646/zootaxa.4790.2.6

publication LSID

lsid:zoobank.org:pub:CDBDED59-95EE-4666-A4B6-F33AD6AA31E5

persistent identifier

https://treatment.plazi.org/id/039187E0-FF87-FFB3-FF13-9B3BFAF7FDFA

treatment provided by

Plazi

scientific name

Monoserius pennarius (Linnaeus, 1758)
status

 

Monoserius pennarius (Linnaeus, 1758) View in CoL

( Fig. 2g View FIGURE 2 , 7 View FIGURE 7 a–c)

Sertularia pennaria Linnaeus, 1758: 813 .

Aglaophenia spicata Lamouroux, 1816: 166 ; Billard, 1909: 329.

Plumularia banksia Gray, 1843: 294 ; Billard, 1910: 48.

Aglaophenia secunda Kirchenpauer, 1872: 35 ; Marktanner-Turneretscher, 1890: 273; Billard, 1909: 329.

Aglaophenia crispate Kirchenpauer, 1872: 36 ; Billard, 1909: 329.

Lytocarpus secundus . Allman, 1883:42; Jaderholm, 1903: 298; Billard, 1908 c: 940.

Lytocarpus fasciculatus Thornely, 1904: 123 View in CoL .

Lytocarpus pennarius View in CoL . Billard, 1909: 329; Ritchie, 1910a: 19.

Hemicarpus fasciculatus . Billard, 1913: 83.

Hemicarpus banksi . Bale, 1924: 263.

Monoserius fasciculatus View in CoL . Leloup, 1932: 165; Vervoot, 1941: 228; Mammen, 1965b: 310.

Monoserius banksii View in CoL . Ralph, 1961: 56.

Monoserius pennarius View in CoL . Mammen, 1965b: 307; Schuchert, 2003: 229.

Material examined. Stn. 32: 21.ii. 2017, 18 m; Stn. 46: 22.xii. 2015, 10 m.

Description. Colony fragment, 9.5 cm, with a polysiphonic main stem and pinnately arranged side branches. Side branches alternate and directed at almost 90° to the main stem. Side branches feather-like in appearance with dense hydrocladia alternately arranged ( Fig. 7a View FIGURE 7 ). Main stem and side branches polysiphonic. Hydrocladia straight, stiff and segmented by transverse nodes. Each node with one hydrotheca and two slightly developed internal ribs originating from the rear side of the hydrotheca but not reaching the other side of the node. Hydrothecae campanulate with a compeletely adnate adcauline side ( Fig. 2g View FIGURE 2 ). Hydrothecal opening perpendicular to the hydrocladial axis. Hydrothecal rim with one abcauline tooth and 4–5 lateral cusps on either side. Median inferior nematotheca half the length of the hydrotheca, with a crenulated rim. Lateral nematothecae small, cup-shaped with their opening directed upwards. Gonocladia, modified hydrocladium bearing gonothecae, straight ( Fig. 7c View FIGURE 7 ). First segment bearing hydrotheca, rest of the segments bearing short branches called nematocladia. Nematocladia with two rows of adnate nematothecae. Goncladial axis also bears nematothecae. Gonothecae absent.

Colour. The main stem is brown in colour with white coloured hydrocladia.

Remarks. In the present study, the dimensions of the hydrothecal depth and diameter at the mouth were recorded as 0.27mm and 0.14mm, respectively. These dimensions are identical to the specimens observed by Ritchie (1910) from Andaman Islands. Although, only two specimens were examined during the study, this species is easily identified based on the overall colony structure ( Fig. 7a View FIGURE 7 ) hydrothecal structure ( Fig. 2g View FIGURE 2 ) and its characteristic gonocladium ( Fig. 7c View FIGURE 7 ). both the specimens were recorded at depths below 10 m, i.e., 10 and 18 m.

Associates. Unidentified sea anemone was observed attached to the basal stalk of the colony ( Fig. 7b View FIGURE 7 ).

Substrate. The species was observed growing in sandy bottom with a mass of roots for anchorage.

Distribution. Type locality; unknown.

India; Gulf of Mannar ( Thornely 1904), Andaman and Nicobar Islands ( Ritchie 1910a and present study), Mouth of Hoogly (Leloup 1932) and Kerala ( Mammen 1965b).

Elsewhere; Ceylon, Indonesia, Philippines, Sothern Japan, Palau, New Zealand ( Schuchert 2003).

Kingdom

Animalia

Phylum

Cnidaria

Class

Hydrozoa

Order

Leptothecata

Family

Aglaopheniidae

Genus

Monoserius

Loc

Monoserius pennarius (Linnaeus, 1758)

Chakraborty, Oishinee & Raghunathan, C. 2020
2020
Loc

Monoserius fasciculatus

Mammen, T. A. 1965: 310
1965
Loc

Monoserius pennarius

Schuchert, P. 2003: 229
Mammen, T. A. 1965: 307
1965
Loc

Monoserius banksii

Ralph, P. M. 1961: 56
1961
Loc

Hemicarpus banksi

Bale, W. M. 1924: 263
1924
Loc

Hemicarpus fasciculatus

Billard, A. 1913: 83
1913
Loc

Lytocarpus pennarius

Ritchie, J. 1910: 19
Billard, A. 1909: 329
1909
Loc

Lytocarpus fasciculatus

Thornely, L. R. 1904: 123
1904
Loc

Lytocarpus secundus

Jaderholm, E. 1903: 298
1903
Loc

Aglaophenia secunda

Billard, A. 1909: 329
Marktanner-Turneretscher, G. 1890: 273
Kirchenpauer, G. H. 1872: 35
1872
Loc

Aglaophenia crispate

Billard, A. 1909: 329
Kirchenpauer, G. H. 1872: 36
1872
Loc

Plumularia banksia

Billard, A. 1910: 48
Gray, J. E. 1843: 294
1843
Loc

Aglaophenia spicata

Billard, A. 1909: 329
Lamouroux, J. V. F. 1816: 166
1816
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