Search found 793 matches

by Willem Heijns
Sat Mar 03, 2018 2:47 am
Forum: General Discussion
Topic: March BAP
Replies: 19
Views: 3607

Re: March BAP

And one from me. ;)
by Willem Heijns
Thu Sep 28, 2017 4:37 am
Forum: Central American Cichlids
Topic: Mayaheros zebra
Replies: 15
Views: 3439

Re: Mayaheros zebra

Hubbs (1936) described 9 subspecies of urophthalmus from the cenotes of Yucatán and interestingly remarked: "other collections from the hundreds of unsampled waters within the general range of the species will produce a full series of intermediate races". Kullander (2003) raised all these subspecies...
by Willem Heijns
Sat Sep 16, 2017 3:20 am
Forum: For Beginners
Topic: Nomenclature change for cichlasoma
Replies: 6
Views: 1792

Re: Nomenclature change for cichlasoma

There is a Facebook group called "Heroine Cichlids" that can provide most of the answers.
by Willem Heijns
Tue Apr 18, 2017 12:05 pm
Forum: Taxonomy
Topic: Labeotropheus simoneae
Replies: 24
Views: 4996

Re: Labeotropheus simoneae

The decision that the fish you have described is indeed the same species as the one earlier described is a taxonomic decision. The Code doesn't deal with those decisions.
by Willem Heijns
Tue Apr 18, 2017 11:27 am
Forum: Taxonomy
Topic: Labeotropheus simoneae
Replies: 24
Views: 4996

Re: Labeotropheus simoneae

I have to object here. Synonymity is about the validity of names and as such a taxonomic issue not regulated by the ICZN.
by Willem Heijns
Fri Mar 13, 2015 10:52 am
Forum: South American Cichlids
Topic: Guianacara species
Replies: 7
Views: 3699

Guianacara species

For those of you who are not on Facebook: I have started a discussion on the Guianacara species I once kept. Here's the same question for you. Can you identify my 8 specimens, using the key and diagnoses from Arbour & López-Fernández (2011)?

Image
by Willem Heijns
Thu Feb 12, 2015 3:58 am
Forum: Taxonomy
Topic: Hypsophrys unimaculatus
Replies: 16
Views: 3917

Re: Hypsophrys unimaculatus

Let's see if I understood correctly. Suppose Kullander & Hartel, Chakrabarty & Sparks and Schmitter-Soto had not been published. Looking at the status of unimaculatus and nicaraguensis , any author would have to conclude that the provisions of Article 23.9.1 ( unimaculatus not used as valid after 18...
by Willem Heijns
Mon Feb 09, 2015 2:51 pm
Forum: Taxonomy
Topic: Hypsophrys unimaculatus
Replies: 16
Views: 3917

Re: Hypsophrys unimaculatus

Thanks for pointing that out Rico. Interesting to note that, had some author corrected Kullander & Hartel before 1 January 2000 (as these authors do themselves with Barlow & Munsey (1976) on froebelii ), the whole issue would be (might have been) completely different. I hadn't realized this. So, we ...
by Willem Heijns
Mon Feb 09, 2015 6:53 am
Forum: Taxonomy
Topic: Hypsophrys unimaculatus
Replies: 16
Views: 3917

Re: Hypsophrys unimaculatus

I'm not so sure. Two issues play a part here: the version of the Code and the way Kullander & Hartel (1997) formulated their proposal. The Code: The current version (4) of the Code makes a distinction between suppressing a name and reversing priority of two synonyms. The latter can be achieved if th...
by Willem Heijns
Sun Feb 08, 2015 9:23 am
Forum: Taxonomy
Topic: Phylogenetic relationships of Middle American cichlids
Replies: 14
Views: 4066

Re: Phylogenetic relationships of Middle American cichlids

I recently read a paper (but I seem to have lost it) with an interesting discussion about species showing phenotypic and/or genetic variation. The subject was adaptive radiation, where few genetic changes (lack of time) result in many different phenotypes. The flipside of this is many genetic change...
by Willem Heijns
Sun Feb 08, 2015 5:06 am
Forum: Taxonomy
Topic: Phylogenetic relationships of Middle American cichlids
Replies: 14
Views: 4066

Re: Phylogenetic relationships of Middle American cichlids

A very interesting issue is emerging here. The position of phylogeny in relation to taxonomy. In my view phylogeny is the study of history. Where does diversity come from and how are organisms related (in terms of descent)? Taxonomy is classification. How do we classify organisms into taxa (be it ge...
by Willem Heijns
Fri Feb 06, 2015 3:52 am
Forum: Taxonomy
Topic: Phylogenetic relationships of Middle American cichlids
Replies: 14
Views: 4066

Re: Phylogenetic relationships of Middle American cichlids

Ingo, I wish there was such a clear distinction between phylogenetic and taxonomic papers. I have seen many phylogenetic studies with a paragraph "taxonomic consequences", containing concrete proposals for nomenclatural change. Also I have seen many taxonomic papers I could hardly describe as having...
by Willem Heijns
Tue Feb 03, 2015 2:30 am
Forum: Taxonomy
Topic: Phylogenetic relationships of Middle American cichlids
Replies: 14
Views: 4066

Re: Phylogenetic relationships of Middle American cichlids

Maybe they are just a little bit slow. :wink:

It illustrates perfectly that generic assignments are a matter of opinion. Apparently (if the above doesn't go) the work of Rican et al. (2008) is not recognized and/or accepted and the current opinion is to follow CLOFFSCA.
by Willem Heijns
Tue Nov 04, 2014 4:03 pm
Forum: Taxonomy
Topic: godmanni of godmani?
Replies: 2
Views: 1537

Re: godmanni of godmani?

Thanks Rico!
by Willem Heijns
Tue Nov 04, 2014 2:10 pm
Forum: Taxonomy
Topic: godmanni of godmani?
Replies: 2
Views: 1537

godmanni of godmani?

As far as I know, specific names after people are spelled adding an "i" to the name of the person or, if the name has been latinized, replacing the ending "us" with an "i". In this case, species named after Godman should have the specific epiphet godmani or godmannii (Godman being latinized into God...
by Willem Heijns
Wed Oct 15, 2014 2:55 pm
Forum: Taxonomy
Topic: P. or N. toae
Replies: 23
Views: 5207

Re: P. or N. toae

Once upon a time there were three cichlid species. They were called: Lamprologus tetracanthus , Lamprologus moorei and Lamprologus toae . These names had been published (in 1899, 1898 and 1946 respectively) according to the rules of the ICZN and were considered valid by most people. Then, in 1985, C...
by Willem Heijns
Wed Oct 15, 2014 4:11 am
Forum: Taxonomy
Topic: P. or N. toae
Replies: 23
Views: 5207

Re: P. or N. toae

This is a clear example of confusing nomenclature and taxonomy. I don't know the first thing about the taxonomy of African cichlids, but from what I read here I can conclude: 1. if the names Paleolamprologus and Neolamprologus have been published in compliance with the Code, both names are available...
by Willem Heijns
Mon Oct 06, 2014 2:48 pm
Forum: Taxonomy
Topic: Question on nomenclature
Replies: 3
Views: 2045

Re: Question on nomenclature

In fact, only number 3 is formally correct. The rules do not allow for generic names with (single or double) quotes around them or for names preceded by "ex". Numbers 1 and 2 are informal indications of genera. Number 2 was proposed by Kullander in 1983 (31 years ago) for species which no longer fit...
by Willem Heijns
Tue Aug 19, 2014 8:06 am
Forum: Central American Cichlids
Topic: Thorichthys aureus blue creek Belize Hobby Zoo
Replies: 10
Views: 5162

Re: Thorichthys aureus blue creek Belize Hobby Zoo

I don't have underwater pictures but there is a video made by me in Blue Creek on Cichlid Room Companion. The fish on there hardly show any more colour.
by Willem Heijns
Tue Aug 19, 2014 3:17 am
Forum: Central American Cichlids
Topic: Thorichthys aureus blue creek Belize Hobby Zoo
Replies: 10
Views: 5162

Re: Thorichthys aureus blue creek Belize Hobby Zoo

Interesting. Here's a picture of Thorichthys aureus freshly collected at Blue Creek, Belize.

Image

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