Igor
You can find something in the otherwise very useful
Online Dictionary of InvertebrateZoology: Complete Work
Armand R. Maggenti Mary Ann Maggenti (Basinger)†
Scott Lyell Gardner‡
University of California, Davis (emeritus),
†University of California, Davis (emeritus),
‡University of Nebraska - Lincoln, slg from unl.edu
nucha n. [ML. nucha, neck] The upper surface of the neck connecting
the head and thorax. nuchal a.
nuchal caruncle (ANN) A sensory organ on the prostomium, or
extending posteriorly in the form of a ciliated ridge or
groove.
nuchal cavity (MOLL: Gastropoda) In Patellacea, the enlarged
portion of the pallial cavity above the head.
nuchal cirrus see cirrus
nuchal constriction (MOLL: Cephalopoda) In most Sepiidae
and Teuthoidea and a few Octopodidae, the separation or
constriction between the head and body or neck.
nuchal organ(s) 1. (ANN: Polychaeta) A pair of ciliated sensory
pits or slits in the head region. 2. (ARTHRO: Crustacea) In
Branchiopoda, a sensory organ on the upper side of the
cephalon. 3. (SIPUN) Ciliated epidermal cells at the mid616
Maggenti and Gardner
dorsal edge of the oral disc; believed to be sensory.
nuchal papilla (ANN: Polychaeta) Small sensory papilla at the
base of the prostomium; cirrus.
nuchal tentacles (PLATY: Turbellaria) In Polycladida, tentacles
well set back from the anterior part of the body.
wormly (probably not defined),
Harry
2013/12/22 Igor Jirkov <ampharete from yandex.ru>
> International Code of Zoological Nomenclature tells nothing about “use the
> additional lettering in indication of year description of species”. However
> it tells:
>> 51.1. Optional use of names of authors. The name of the author does not
> form part of the name of a taxon and its citation is optional, although
> customary and often advisable.
>> So to my mind it is clear that one can freely used everything, including
> letters.
> For example one can freely use one of these forms
> Smith et Smith
> Smith & Smith
> Smith, Smith
> I prefer first option, as it is Latin, usually used second.
> Practically however usually in such a papers at the same time usually
> there is “Synonymy”. So it is not necessary to use letters directly in
> names of taxa, may be enough to use it in synonymy. But it is a matter of
> taste.
>> I have another question
> Many of us use (or have used) the term nuchal organ. However, I cannot
> find a definition of this term. Does anybody know a strict and precise
> definition that can be used to determine whether a structure is a nuchal
> organ or not.
>>> wormly Igor
>> --
> Dr. Sc. Igor A. Jirkov
> Leading Scientific Researcher
> Department of Hydrobiology
> Biological faculty
> Moscow State University
> Moscow
> Russia
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