Gynogenesis

Yes, no latissimus is a standard bisexual species. There are at least two possible explanations for finding only females: 1-the predominance of females (as, for example, in Altica leafblocks); 2-no luck!!!

Dytiscus latissimus Linnaeus, 1758 is very rare here (in the Tambov region) and is known from several specimens. but, what is alarming... all specimens are FEMALE!

Just on the topic: the fact that this beetle is local and rare is absolutely true. But the fact that all known specimens from the Tambov region are females is not so! I have already posted in the topic "Water beetles" a photo of a specimen in my collection from the Sosnovsky district of the Tambov region, caught on 25.09.2009. As you can see - a typical samEt!


This post was edited by Dmitrich - 11/23/2010 12: 10

Dear Dmitry,
And do you have any other material on the Tambov region I recently started to analyze, including very interesting

Dear Dmitry,
And if you have any other material on the Tambov region, I recently began to analyze, including very interesting

Practically none: I'm from the Yaroslavl region myself. In addition to Dytiscus latissimus, there are 3 more specimens of Cybister lateralimarginalis collected in the autumn (September) of this year in the same pond of the Sosnovsky district.

Just on the topic: the fact that this beetle is local and rare is absolutely true. But the fact that all known specimens from the Tambov region are females is not so! I have already posted in the topic "Water beetles" a photo of a specimen in my collection from the Sosnovsky district of the Tambov region, caught on 25.09.2009. As you can see - a typical samEt!

Latissimus is a handsome man! I would like to find such a person in Saratovskaya

2Mantispid
What's the problem???
take a juvenile delirium (0.5 - 1 cm cell) 3-5 km long. Put it across the Volga and slowly and mournfully" against the current " drag it.
And, perhaps, you will be happy in the form of 1-2 copies of LATISSIMUS!!!

2Mantispid
What's the problem???
take a juvenile delirium (0.5 - 1 cm cell) 3-5 km long. Put it across the Volga and slowly and mournfully" against the current " drag it.    
And, perhaps, you will be happy in the form of 1-2 copies of LATISSIMUS!!!    

Joker however

the question, I think in gynogenesis, so let's not clutter up the topic with latissimus )

This post was edited by RippeR - 24.11.2010 02: 11

  
The question of the possibility of gynogenesis in coleoptera interested me from the moment when I caught a pair: a female Dytiscus latissimus Linnaeus, 1758 and a male Dytiscus marginalis Linnaeus, 1758, which is called in copula, or when trying to do it, when they surfaced for air. Dytiscus latissimus Linnaeus, 1758 is very rare here (in the Tambov region) and is known from several specimens. but, what is alarming... all specimens are FEMALE! Tell me, pliz, what is it? maybe they're like silver carp-we don't have a lot of males either, to put it mildly.

the question, I think in gynogenesis, so let's not clutter up the topic with latissimus )

Well, that's too straightforward, Andrey . The question of gynogenesis in this particular case was raised by the author of the topic precisely in connection with it in plavuntsy and, in particular, in latissimus. So no one really cluttered the topic. There was a question , and the answer came. That's all. And along the way, the admiration for a rare beetle and the corresponding brief discussion are due to the professional personality deformity inherent in each of us.

Today I was promised to bring a book by some "non-Russian" author, where he gives a link to another author who wrote about gynogenesis in the genus Ptinus (Ptinidae), but was very busy at work and did not take the book

Well, I was just interested in genogenesis, and I thought that this is what the author is interested in, and not just in latissimus )
I am interested to hear the answer as soon as possible, so I wrote )

By the way: http://www.zin.ru/labs/marine/doc/Grebelny...logy_v3_no1.pdf
Indeed, gynogenesis is noted in Ptinus.

Did RippeR understand me completely correctly ? on gynogenesis, and latissimus "special case"