Sertularia setacea Linnaeus, 1758: 813
Plumularia setacea
Deevey, 1950: 347
Some shallow-water hydroids (Cnidaria: Hydrozoa) from the central east coast of Florida, USA
Calder, Dale R.
Zootaxa
2013
2013-05-14
3648
1
1
72
Sertularia setacea Linnaeus, 1758: 813
4KJLT
(Linnaeus, 1758)
Linnaeus
1758
[151,599,1376,1403]
Hydrozoa
Plumulariidae
Plumularia
Animalia
Leptothecata
36
37
Cnidaria
species
setacea
Fig. 10e
Sertularia setacea Linnaeus, 1758: 813. Plumularia setacea.— Deevey, 1950: 347, fig. 6.
Typelocality. UK: Brighton (“Brighthelmstone”) and Whitstable ( Ellis 1755: 19, as Corallina setacea). Linnaeus (1758)gave the binomen Sertularia setaceato the species described by Ellis, listing its locality only as “Habitat in Oceano.” Voucher material. Off Vero Beach, 27°41.2’N, 80°14.5’W, 17 m, 13.ii.1974, small biological dredge, R/ V GosnoldStation220/226, several colony fragments, up to 2.4 cmhigh, without gonophores, ROMIZ B1077.— Fort Pierce Inlet, north jetty, north side, 27°28’24.2’N, 80°17’20.3”W, low water, on polychaete tubes, 15.ii.1991, 20° C, collected manually, six colony fragments, up to 2.1 cmhigh, with gonophores, coll. D.R. Calder, ROMIZ B1111.
Remarks. Plumularia setacea( Linnaeus, 1758)and P. strictocarpa Pictet, 1893are generally said to be indistinguishable morphologically in the absence of reproductive structures. Part of the material examined here (ROMIZ B1111) bore gonophores protected by fusiform gonothecae, typical of P. setacea. Specimens from shelf waters off Vero Beach (ROMIZ B1077), although sterile, were assigned to the same species based on the size of the colonies, larger than normally found in P. strictocarpa, and their identical appearance to colonies from Fort Pierce Inlet (ROMIZ B1111) having gonophores. Also somewhat resembling Plumularia setaceaare three less well known species originally described from the Straits of Florida region, P. filicula Allman, 1877, P. attenuata Allman, 1877, and P. megalocephala Allman, 1877. As noted earlier ( Calder 1997), all appear to differ from the present species in having hydrocladial apophyses with pronounced cylindrical extensions distal to the mamelon, and in bearing a nematotheca on the proximalmost (ahydrothecate) internode of each hydrocladium. Moreover, gonothecae of P. filicula, as described and illustrated by Allman (1877), have a wide, oblique aperture rather than a small circular one at the end of a narrow neck as in P. setacea. In P. attenuata, all hydrocladial internodes beyond the proximalmost one are hydrothecate instead of being alternately hydrothecate and athecate. Hydrocauli of P. megalocephalawere described by Allman as being irregularly branched, whereas those of P. setaceaare usually unbranched or only sparingly branched. In some respects these hydroids resemble species of Nemertesia Lamouroux, 1812, but further study is needed to confirm their generic affinities. Thorough taxonomic accounts of Plumularia setaceaare given by Ansín Agís et al. (2001)and Schuchert (2013). Reported distribution.Atlantic coast of Florida. Central east coast of Florida( Deevey 1950, distribution map). Western Atlantic. Marthas Vineyard ( Fraser 1944) to Argentina(Oliveira et al. submitted), including Bermuda( Calder 1997), the Gulf of Mexico ( Calder & Cairns 2009), and the Caribbean Sea ( Galea 2010). Elsewhere. Cosmopolitan except for polar regions ( Ansín Agís et al. 2001; Schuchert 2013).
1974-02-13
ROMIZ
V Gosnold Station
17
27.686666
Off Vero Beach
123
-80.24167
Gosnold Station
36
37
B1077
1
1991-02-15
ROMIZ
D. R. Calder
Fort Pierce Inlet
-80.28897
36
37
B1111
1