My choice of subject matter has, as was always the intention, been geared towards spiders and other arachnids, although I have also enjoyed studying other subjects as and when samples presented themselves. I currently have 16 galleries. To access a particular gallery, click on the relevant thumbnail. To see individual pictures at a larger scale, complete with a caption, click on that image. You can cycle through the other photos in the gallery by clicking on the forward and back arrows at the bottom of the individual image page.
To return from a single image to the individual gallery page, click on the cross at the top right of that page. To return to this page, click on the link near the top left of the individual gallery. Some of the micrographs include a data bar at the bottom that records the conditions under which the micrograph was taken, including a magnification. This magnification is accurate when the image is displayed on the screen of the original SEM, but not when viewed on another PC or on a laptop, tablet, phone etc. The scale bar is always correct. Other micrographs have been further processed to remove the data bar and distracting backgrounds. For these, the scale bar has been moved to the body of the image.
The newest material is positioned at the top of the list. All galleries from Pseudoscorpions 2 upwards were taken on the TESCAN MIRA 4. Galleries below that one were taken on the FEI Inspect S50.
In addition to these galleries there is a complete sub-
This gallery shows photos of material excavated from either Syracuse in Sicily, or Sennen Cove in Cornwall. Help with identification of the specimens would be appreciated. (By sub-
The majority of these samples were prepared by simply brushing pollen from a flower directly onto a sticky carbon pad on an aluminium stub and then sputtering with gold, without any attempt to dry the grains. In some cases, distortion of the specimen may have taken place, although the images remain interesting. In one or two cases Low Vacuum mode has been used, where the pollen was placed in the chamber without sputter coating.
Arachnid Tarsi and a Leg
This gallery shows the structure of the feet or “Tarsal Claws” of various arachnids, almost all spiders, with one mite. There is also a view of a spider leg showing the structure of the many hairs.
Eyes and Heads of Spiders
This gallery illustrates the different arrangements of the eyes on different families of spider. Most species of spider have eight simple eyes, although some species have six. The number, relative size and disposition of the eyes are key identifiers to family level.
Fangs and Chelicerae of Spiders
Spiders catch their prey in jaw-
Pedipalps of Mostly Male Spiders
All spiders have “pedipalps” which resemble antennae or a 5th pair of legs, adjacent to the head. In mature males these are swollen and used for mating. The male spider will deposit a blob of sperm onto a web specially spun for the purpose and “suck” this into his pedipalps. On encountering a female the male will attempt to hook his pedipalps, one at a time, into the female’s epigyne, and transfer the sperm that way. The structure of the female pedipalp is much simpler than that of the male, and an example is included in the gallery.
A colony of Vespula germanica wasps took up residence in my roof space, and individuals would regularly find their way into my study. This provided a ready supply of material for the SEM. The images are of the wings, head, eyes, stings and egg-
A local vet provided me with a selection of ticks, recently removed from a hedgehog. Various parts of the anatomy, in particular the barbs that help the tick latch onto the prey, make interesting micrographs.
I was given a phial of cleaned fossil marine diatom material, by Klaus Kemp. The micrographs in this gallery are a selection made using that material. Any assistance in the identification of individual species would be much appreciated. Images are numbered to enable cross-
Even though not all spiders spin webs to catch their prey, all spiders do have spinnerets for the production of silk. These are located at the rear of the abdomen, adjacent to the anus. Apart from spinning webs to entrap prey there are a number of other uses for silk. These include: wrapping eggs, use as a parachute for “ballooning”, as an escape line, wrapping prey etc. etc.
Miscellaneous material Summer and Autumn 2020
This gallery shows a variety of subjects imaged following the installation of my TESCAN MIRA 4 SEM. Subjects represented are the common garden ant, a small weevil, a bug, butterfly scales and a diatom at two widely separated magnifications
Spider Material 2020
This gallery shows a selection of spider images that were uploaded to my separate spider website during the second half of 2020 following the installation of my MIRA 4 SEM. Clicking on the link in the caption to each image will take you to the web page for that species, opening it in a new tab or window.
Diatoms are microscopic algae, having a siliceous “skeleton”. The images are of the cleaned skeletons.
An anaglyph is an image that has been created by the combination of two separate images taken at slightly different angles to each other, to provide a 3-
Pseudoscorpion Chthonius ischnocheles
I was provided with some samples of Chthonius ischnocheles which enabled me to mount and image my first pseudoscorpion. During preparation I lost track of which loose jaws and pedipalps came from which side of the creature, and also some over-
This gallery contains images of four species of pseudoscorpion.
Also known as “water bears” these microscopic creatures can be found in a variety of habitats including moss growing on the roofs of houses. They are described as “extremophiles” since they can survive in a very wide variety of habitats, including space! In their active state they like moist environments.
They can range in size from approximately 0.1 mm to more than 1 mm but are typically 0.3 to 0.5 mm in length.
This gallery shows “dehydrated” (on the left) and “hydrated” pollen grains along with a picture of the flower from which they originate. The dehydrated state exists for the pollen on the originating flower. Once a pollen grain is successfully transferred to the pistil (female part) of a receiving flower it swells and puts out pollen tubes, one of which will penetrate down the stylar canal.
For these images dehydrated pollens were hydrated by soaking in water, and then dehydrated once more, using alcohols, to provide a dry specimen for imaging. Scale bars are approximate.