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1
A Dictionary for Invertebrate Zoology:
[Gr. dis, twice; aktis, ray] Being pointed at both ends. diactinal monaxon (PORIF)
A monaxon that develops by growing in both directions, while originating from a
central point; diactine; rhabdus. diactine see diactinal monaxon diaene n. [Gr. dis
...
2
The Light and Smith Manual: Intertidal Invertebrates from ...
Intertidal Invertebrates from Central California to Oregon Sol Felty Light James T.
Carlton. axes= 1 monaxon axes = 1 monaxon rays = 1 monactine rays = 2
diactine axes = 1 monaxon axes = 1 monaxon rays = 1 monactine 1- axes = 4
tetraxon ...
Sol Felty Light, James T. Carlton, 2007
3
Advances In Marine Biology
Presently, the group contains three families (Figure 57) diVerentiated by
pentactine hypodermalia and diactine principalia in Rossellidae; no
hypodermalia and hexactine principalia in Leucopsacidae; no hypodermalia and
stauractine, ...
Triactine, diactine, and monactine forms occasionally occur. Smaller sizes with
more numerous rays (Fig. 10 e, Plate 13) occur intermingled with the larger
characteristic forms. In these spicules, which oiïer a transition to the metasters,
the rays ...
Harvard University. Museum of Comparative Zoology, 1917
It is a diactinal monaxon or a diactine (Fig. 3.3«). The tylostyle, typical
megasclere of the order Hadromerida, is knobbed at one end, pointed at the
other. It is a monactinal monaxon (Fig. 3.3e). During growth of the spicule, if
development ...
Patricia R. Bergquist, 1978
6
Memoirs of the Museum of Comparative Zoölogy at Harvard College
The skeleton consists of pentactine and diactine pinules, pentactine, hex- actine,
and diactine megascleres, modified basal spicules, stalk-spicules,
microhexactines, and amphidiscs. The diactine pinules are associated with
ordinary diactine ...
Harvard University. Museum of Comparative Zoology, 1915
7
Tulane Studies in Zoology and Botany
Diactine megascleres present only 25 Monactines and/or diactines present as
megascleres ....24 24. Monactines and diactines present as megascleres 36
Monactine megascleres present only . .42 25. Diactine megascleres only, no ...
The skeleton consists of pentactine and diactine pinules, pentactine, hex- actine,
and diactine megascleres, modified basal spicules, stalk-spicules, microhex-
actines, and amphidiscs. The diactine pinules are associated with ordinary
diactine ...
9
Principles of zoological micropaleontology
of one ray, but is rare. Anchor-shaped forms also can be derived from a triactine
and are called anadiaenes (a diaene is normally a spicule in which one ray is
different, usually being longer than the others). 4. The diactine is a two -rayed ...
10
A Guide to Marine Life on South African Shores
Spicules are stout styles and smaller bent diactine oxeas. A thick encrusting
reddish-brown sponge with slight turrets . Ophlitaspongia seriata - Spicules are
all slightly curved diactine oxeas .... 14 14. Oscular turrets very tall Ciocalypta
alleni ...
