Hippurella annulata Allman 1877
- Dataset
- An integrative study of Callicarpa gracilis Fewkes, 1881 and Aglaophenia trifida L. Agassiz, 1862, with notes on some hydroids (Cnidaria: Hydrozoa) from French Guiana
- Rank
- SPECIES
Classification
- kingdom
- Animalia
- phylum
- Cnidaria
- class
- Hydrozoa
- order
- Leptothecata
- family
- Plumulariidae
- genus
- Hippurella
- species
- Hippurella annulata
description
Description. Colonies up to 15 cm high, arising from a dense bundle of tubular filaments; stem fascicled throughout, giving rise to monosiphonic, (sub) opposite to alternate side branches, pinnately-set proximally, irregularly arranged distally around the stem; branches divided into rather long internodes, each bearing a nematotheca proximally, and a latero-distal cladial apophysis; axil with conical mamelon and a pair of axillar nematothecae; cladia alternate on the side branches; set in one plane proximally, but surrounding the branches on all sides distally and, there, either scattered or regularly verticillate; heteromerously divided into alternating long, hydrothecate and short, ahydrothecate internodes; two intranodal septa, one proximal, the other distal; hydrothecate internodes with a hydrotheca and its complement of 3 nematothecae, one mesial and a pair of laterals; hydrothecae deep, thimble-shaped, with slightly everted margin, rim even; ahydrothecate internodes with single nematothecae; gonothecae arising singly from the axils of hydrocladia, fusiform, with a somewhat bottle-shaped neck.
description
Fig. A 2
discussion
Remarks. Type material was destitute of a gonosome, but Nutting (1900) found a fertile specimen “ among the Albatross material from the West Indies ”.
distribution
Distribution. Off Pacific Reef, Florida (ca. 25 ° 22 ’ N, 80 ° 08 ’ W, 517 m); off Charleston, South Carolina (32 ° 7 ’ N, 78 ° 37 ’ W, 419 m); off Beaufort, North Carolina (34 ° 39 ’ N, 75 ° 33 ’ W, 195 m) [summarized by Nutting (1900)]. FIGURE A 2. Hippurella annulata Allman, 1877. A. Whole colony. B. Portion of stem with proximal parts of two consecutive hydrocladia. C. Cladial apophysis. D. Portion of cladium. E. Detail of a hydrotheca. F. Distal part of a branch with gonothecae. Modified after Allman (1877) (A, B), Fewkes (1881, as Antennopsis ramosa) (C), and Nutting (1900, as Antennopsis annulata) (D – F).
Name
- Homonyms
- Hippurella annulata Allman 1877