A reassessment of Halopteris polymorpha (Billard, 1913) (Cnidaria: Hydrozoa), with descriptions of three new species Author Galea, Horia R. Hydrozoan Research Laboratory, 405 Chemin des Gatiers, F- 83170 Tourves, France horia.galea@gmail.com Author Gioia Di Camillo, Cristina Dipartimento di Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche, I- 60121 Ancona, Italy Author Maggioni, Davide Marine Research and High Education (MaRHE) Center, Università degli Studi di Milano-Bicocca, 12030 Magoodhoo Island, Faafu Atoll, Maldives Author Montano, Simone Marine Research and High Education (MaRHE) Center, Università degli Studi di Milano-Bicocca, 12030 Magoodhoo Island, Faafu Atoll, Maldives Author Schuchert, Peter Muséum d’histoire naturelle, C. P. 6434, CH- 1211 Genève 6, Switzerland text Revue suisse de Zoologie 2018 2018-03-31 125 1 21 59 journal article 3943 10.5281/zenodo.1196007 9f6a1d45-f725-42d1-a64c-b6ffaaae23d7 0035-418 1196007

Table 2. Literature records included earlier in the synonymy of Halopteris polymorpha (Billard, 1913), but deviating from the present concept of this species (H. stands for Halopteris). N.B.: Italics are used to emphasize the distinguishing characters.

	Halopteris polymorpha (Billard, 1913)			Halopteris sp.	Halopteris sibogae (Billard, 1913)
	Present study, MHNG-INVE-97937	Billard (1913), Siboga Stn. 80	Schuchert (1997), Siboga Stn. 80	Present study, MNHN H.L. 1309, Siboga Stn. 299	Present study, MHNG-INVE-97926	Billard (1913), as H. polymorpha var. sibogae
- length apophyses of lateral nematothecae	40-55	-	-	50-60	95-105	-
- length lateral nematotheca	70-80	-	-	80-90	125-145	-
- diameter of lateral nematotheca at rim	65-80	-	-	50-60	55-65	-
- length of mesial nematotheca	60-65	-	-	45-55	55-60	-
- diameter at rim of mesial nematotheca	45-50	-	-	40-45	45-50	-
- length of axillar nematotheca	ca. 40	-	-	30-35	40-55	-
- diameter of axillar nematotheca at rim	ca. 35	-	-	ca. 20	30-40	-
Gonotheca
- length of pedicel	70-80 (♂); ca. 80 (♀)	-; -	-; -	-; -	30-45 (♂); ca. 45 (♀)	-; -
- length (excluding pedicel)	490-560 (♂); 1015-1040 (♀)	-; -	- (♂); ca. 650 (♀)	-; -	330-440 (♂); 620-685 (♀)	-; -
- maximum width	210-240 (♂); 480-510 (♀)	-; -	-; -	-; -	165-220 (♂); 310-365 (♀)	-; -
- diameter at aperture (♀)	330-350	-	-	-	180-215	-
- number of basal nematothecae	2 (♂); 2-3 (♀)	-(♂); 3 (♀)	-(♂); 2-3 (♀)	-; -	2 (♂); 3 (♀)	-; -