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 3. Comparative measurements (in μm) and main morphological features of H. vervoorti Galea, 2008 from various localities. Ho stands for homomerous and He for heteromerous.

Geographical origin	Bali	Madagascar	Maldives	Guadeloupe, Martinique (*)
Reference(s)	Present study	Present study	Present study	Galea (2008); present study (*)
Caulus (seen frontally)
- maximum height (cm)	1.2	0.8	1.3	2
- segmentation	Ho (dist. He)	Ho (dist. He)	Ho (dist. He)	Ho (dist. He)
- superior nematothecae / internode with opposite cladia	2	1-2	1-2	1-2 (*)
- nematothecae above hydrotheca in ordinary internodes	1-2, in a median row	1-2, in a median row	1-2, in a median row	1-2, in a median row
- number of axillar nematothecae	2 (distally 1)	2 (distally 1)	2 (distally 1)	2 (distally 1) (*)
- internode length	380-445	410-490	360-500	330-465
- diameter at node	55-110	45-105	60-115	-
- length of apophysis	65-80	85-95	60-75	60-70
- length of nematothecae	55-75	65-70	65-80	-
- diameter of nematothecae at rim	45-50	35-45	40-45	-
Cladia (seen laterally)
- segmentation	He	He	He (occ. Ho)	He
- number of nematothecae on 1st ahydrothecate internode	1	1	1 (occ. 2)	1 (occ. 2) (*)
- nematothecae on ordinary ahydrothecate internodes	1	1	1	1
- number of axillar nematothecae	1 (rarely 2)	1 (rarely 2)	1 (rarely 2)	1 (rarely 2)
- length of quadrangular segment	45-50	50-60	40-55	70-90
- length of 1st ahydrothecate internode	190-270	160-240	175-255	155-215
- length of ordinary ahydrothecate internodes	125-160	160-205	140-190	115-170
- length of hydrothecate internodes	245-330	255-315	270-315	251-300
- diameter at transverse node	35-40	40-45	40-45	-
- length of nematothecae	50-70	55-65	55-70	-
- diameter at rim of nematotheca	35-40	35-40	30-45	-
Hydrotheca (cladial)
- shape of the rim (lateral view)	Even	Even	Even	Even
- length abaxial wall	180-215	180-205	180-215	220-245
- length free adaxial wall	110-115	110-120	110-120	115-135
- diameter at rim	155-175	180-190	165-175	170-195
- length apophyses of lateral nematothecae	55-50	70-80	50-60	74-86
- length lateral nematothecae	75-85	80-95	75-95	74-88
- diameter of apical chamber of lateral nematotheca at rim	65-70	60-70	60-70	63-72
Reference(s)	Present study	Present study	Present study	Galea (2008); present study (*)
- length of mesial nematotheca	50-55	50-60	60-65	-
- diameter at rim of mesial nematotheca	45-50	45-55	50-55	-
- length of axillar nematotheca	40-55	35-40	35-40	-
- diameter of axillar nematotheca at rim	30-40	ca. 30	30-35	-
Gonotheca
- length of pedicel	- (♂); - (♀)	45-60 (♂); 45-50 (♀)	-(♂); 50-60 (♀)	ca. 45 (♂); ca. 50 (♀) (*)
- length (excluding pedicel)	- (♂); - (♀)	430-625 (♂); 660-705 (♀)	-(♂); 585-670 (♀)	500-630 (♂); 695-730 (♀) (*)
- maximum width	- (♂); - (♀)	180-260 (♂); 390-425 (♀)	-(♂); 315-350 (♀)	195-275 (♂); ca. 330 (♀) (*)
- diameter at aperture	- (♂); - (♀)	55-70 (♂); 245-290 (♀)	-(♂); 205-240 (♀)	ca. 30 (♂) (*); ca. 225 (♀) (*)
- number of basal nematothecae	- (♂); - (♀)	2(♂); 2 (♀)	-(♂); 2 (♀)	2(♂); 2-3 (♀) (*)