Bothriembryon

Photo of the day (83): Bothriembryon

On this website I found a picture of Bothriembryon tasmanicus (Pfeiffer, 1853). I don’t know if it is a common species on Tasmania, but anyway, pictures of living snails are always a good find. It is said to belong to a different subgenus, Tasmanembryon, but it would be interesting to see if the molecular data corroborate that view. Anyone around there to collect some specimens?

Bothriembryon tasmanicus

Orthalicid radulae (1): Bothriembryon

This is strictly not about Neotropical snails. But still about orthalicids. And as the relationships between the different group within the (super)family is one of my research topics, I think it is still "on topic" for this blog.

Sometimes you have data that you considered lost. I thought that all data used for my papers in the 70s and 80s had gone. This weekend I cleaned up a bit in my house and found a tray with several hundreds of SEM photographs of radulae, arranged according to different species.
Since only a small part has actually been published in the past (viz. my
Zoologische Verhandelingen 164 [1978] and 168 [1979]), I think it is worthwile to grab from time to time some from this tray and put them up here.
It is astonishing to see that the quality of those old machines and analog photographs still is very comparable to those from modern equipment and which are digitally processed. The biggest difference is that modern machines are easily operated (I recently did myself, but that is something for a future post) and results can be swiftly processed.

The 'grab of the day' is
Bothriembryon gunnii (Sowerby, 1845). This is an orthalicid occurring in Tasmania. The specimen shown here is from Coles Bay and kept in the Leiden museum (ZV 164: 209).

Both_gunii_R_intera1Both_gunii_R_intera2
Both_gunii_R_centralBoth_gunni_R_L7_9
Upper figures: interaction between the teeth. Lower left: central; lower right: lateral 7-9.

Update: Now I realize that
B. gunni is the name of the fossil species that occurs on Tasmania. The Recent species should be called B. tasmanicus (Pfeiffer, 1853).