Search found 387 matches

by Rico Morgenstern
Sun Apr 10, 2016 2:14 am
Forum: Central American Cichlids
Topic: Is this really thorichthys maculipinnis?
Replies: 18
Views: 4764

Re: Is this really thorichthys maculipinnis?

It may be a hybrid of T. meeki and T. maculipinnis . The distribution of red and the fin ornamentation is intermediate between the two species. The size is unusual, but many cichlids may get larger in aquarium than in the wild due to larger and more constant supply with, and different composition of...
by Rico Morgenstern
Sun Apr 10, 2016 1:07 am
Forum: Taxonomy
Topic: Nine New Genera of Central and South American Cichlids Described
Replies: 28
Views: 6823

Re: Nine New Genera of Central and South American Cichlids Described

Bas, we should rather use Amphiloph ines , Astathero ines , etc., since the ending "-ini" denotes formally established tribes, but these are informal groups without nomenclatoral status. All genera treated in the paper belong to a single tribe, Therapsini Allgayer, 1989 (Heroini Kullander, 1998 is a...
by Rico Morgenstern
Tue Mar 01, 2016 10:59 pm
Forum: South American Cichlids
Topic: Species ID help. Aequidens?
Replies: 10
Views: 2585

Re: Species ID help. Aequidens?

The first four photos show defenitely all Laetacara dorsiger. L. araguaiae does not occur in Paraguay and is readily distinguished by color pattern. Bujurquina vittata, also strikingly different in color pattern, would have a much larger eye and a truncate caudal fin at this size.
by Rico Morgenstern
Fri Feb 19, 2016 7:31 am
Forum: South American Cichlids
Topic: New, and Interesting Undescribed Geophagoid?
Replies: 17
Views: 3081

Re: New, and Interesting Undescribed Geophagoid?

Thanks Mark! The fish looks quite striking, but as far as can judged from external characters I do not find it that different from Geophagus species such as G. harreri or related forms. The color pattern (melanin markings be seen better in the preserved juvenile on the previous photo) departs even l...
by Rico Morgenstern
Wed Feb 17, 2016 11:46 am
Forum: South American Cichlids
Topic: New, and Interesting Undescribed Geophagoid?
Replies: 17
Views: 3081

Re: New, and Interesting Undescribed Geophagoid?

It doesn't work for me, too. I'm very curious about the fish!
by Rico Morgenstern
Thu Feb 04, 2016 3:26 am
Forum: Central American Cichlids
Topic: Herichthys deppi variations?
Replies: 6
Views: 2034

Re: Herichthys deppi variations?

Judging from field photos in our catalog and elsewhere there are no obvious color differences between fish from Rio Misantla and Nautla (includes Rio Bobos) system, the two principal drainages within the species' range. At least none that would not be covered by individual variation or differences d...
by Rico Morgenstern
Sat Nov 14, 2015 12:53 am
Forum: South American Cichlids
Topic: Species ID help. Aequidens?
Replies: 10
Views: 2585

Re: Species ID help. Aequidens?

Besides Laetacara dorsiger , two other ' Aequidens -like' cichlids are known to occur in that area - Bujurquina vittata and Cichlasoma dimerus . Both have the dark bar below eye and a narrow vertical streak rather than a blotch at the base of the caudal fin at this very small size. However, judging ...
by Rico Morgenstern
Wed Oct 14, 2015 1:45 pm
Forum: South American Cichlids
Topic: Ornatum or Gephyrum
Replies: 26
Views: 11262

Re: Ornatum or Gephyrum

Yes of course, Mark. Nevertheless the the genus Mesoheros might be regarded as fairly well known compared to other cichlid genera of the region. Andinocara is still a big problem; and nobody knows how many species the Caquetaia umbrifera complex contains, not to mention the enigmatic 'Cichlasoma' mi...
by Rico Morgenstern
Fri Oct 09, 2015 10:37 am
Forum: South American Cichlids
Topic: Ornatum or Gephyrum
Replies: 26
Views: 11262

Re: Ornatum or Gephyrum

Provided the locality Rio Cajambre is correct, these fish are of particular interest because this river is located between the known ranges of Mesoheros ornatus and M. gephyrus. Which would not exactly facilitate their determination.
by Rico Morgenstern
Fri Sep 18, 2015 3:50 am
Forum: Taxonomy
Topic: Eight New Middle American Cichlid Genera
Replies: 22
Views: 5677

Re: Eight New Middle American Cichlid Genera

There would be of course a lot to say about this paper, but I thought it was good to let it sink in a little. Principally, I think it is good that something happens. After years of stagnation and announced papers that never appeared, this publication is doubtlessly a step forward, and be it only for...
by Rico Morgenstern
Wed Sep 16, 2015 2:26 am
Forum: Central American Cichlids
Topic: Bifasciata
Replies: 2
Views: 1438

Re: Bifasciata

Vieja bifasciata usually shows two horizontal stripes along the body, the lower from gill cover or just above pectoral fin base to root of caudal, the upper (broader and irregularly defined) from above midpoint of pectoral to end of dorsal fin base. The stripes are well separated by a light zone ex...
by Rico Morgenstern
Wed Sep 16, 2015 2:07 am
Forum: Central American Cichlids
Topic: Jack Dempsey tankmates
Replies: 6
Views: 4309

Re: Jack Dempsey tankmates

If you want to keep a pair of Jack Dempseys, the possibilities are limited given the relatively small tank. You can add at best one pair of other cichlids that do not require large territories but are capable to hold their own. I have successfully combined Rocio octofasciata with Cryptoheros cutteri...
by Rico Morgenstern
Sun Jul 19, 2015 1:38 pm
Forum: Central American Cichlids
Topic: Newly Discovered Central American Cichlids Lately?
Replies: 6
Views: 2379

Re: Newly Discovered Central American Cichlids Lately?

I don't believe that there is much left to discover. I think that most future additions will come from justified or unjustified splitting of known species, and a few potentially undescribed species are left, the 'most promising candidates' to get a name sooner or later are the following in my view: ...
by Rico Morgenstern
Sun Jul 12, 2015 7:24 am
Forum: Central American Cichlids
Topic: Impressions from recent trips
Replies: 8
Views: 2267

Re: Impressions from recent trips

Rico, are you sure about that Astatheros female? I find it a very odd fish. The lack of black spotting really doesn't with with A. bussingi. Note that this was the only unspotted individual that we caught at this site, and A. rhytisma has been reported from the same locality (according to Bussing) ...
by Rico Morgenstern
Sat Jul 04, 2015 5:09 am
Forum: Central American Cichlids
Topic: Impressions from recent trips
Replies: 8
Views: 2267

Re: Impressions from recent trips

Wonderful, thanks for sharing Michi! The variability of Poecilia spp. is striking, as are the differences between the two A. longimanus . Just a few corrections: what you have identified with query as Astatheros rhytisma is a nice female of A. bussingi , and I doubt the identification of Herichthys ...
by Rico Morgenstern
Sat Feb 14, 2015 10:43 am
Forum: Taxonomy
Topic: Hypsophrys unimaculatus
Replies: 16
Views: 3995

Re: Hypsophrys unimaculatus

Unless I miss something, the few differences they noted are based on comparision of the two type specimens of P. gulosus with figure of the holotype of P. managuensis , a considerably larger specimen, and are readily attributable to size. I know of no work, in which real interpopulational difference...
by Rico Morgenstern
Sat Feb 14, 2015 7:31 am
Forum: Taxonomy
Topic: Hypsophrys unimaculatus
Replies: 16
Views: 3995

Re: Hypsophrys unimaculatus

Yes, it would be valid. A nomen oblitum has, in principle, the same status as a junior synonym. If the synonymy is subjective (i.e. the nominal taxa are based on different name-bearing types) and the types are no longer conspecific, such a name becomes valid (unless contesting another name in prevai...
by Rico Morgenstern
Thu Feb 12, 2015 12:23 pm
Forum: Taxonomy
Topic: Hypsophrys unimaculatus
Replies: 16
Views: 3995

Re: Hypsophrys unimaculatus

....like everyone else. And this is good since it provides stuff for interesting discussions (interesting at least for the participants).
by Rico Morgenstern
Wed Feb 11, 2015 11:03 am
Forum: Taxonomy
Topic: Hypsophrys unimaculatus
Replies: 16
Views: 3995

Re: Hypsophrys unimaculatus

What we have to judge from Art. 23.9 is not the work by Kullander & Hartel but the nomenclatural status of the species names involved in this case. Relevant is (apart of course from the proposed synonymies) only the fact that they don't have used Aggassiz' species names as valid, regardless if corre...
by Rico Morgenstern
Mon Feb 09, 2015 10:54 am
Forum: Taxonomy
Topic: Hypsophrys unimaculatus
Replies: 16
Views: 3995

Re: Hypsophrys unimaculatus

It is true that, according to the 3rd edition of the Code then in force, Kullander & Hartel (1997) actually have had either to apply the Principle of Priority strictly (i.e. validate Hypsophrys unimaculatus and also Parachromis gulosus , the taxonomic identity of Amphilophus froebelii was left somew...

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