eaneubauer 的日誌

https://eaneubauer.ipower.com/Wolf%20Spider%20Research%20in%20the%20Field%20revised%20300.pdf

In the last several months I've thought about how I collect data in the field. The first part was improving ventral views by getting more light on the subject, eliminating reflections on a glass bottom, and using a container with inward sloping sides so the subject wasn't as inclined to try climbing the walls. The latest step involved improvements on dorsal views. I took photos of spiders in a pint Tupperware container, a gallon ice cream tub, and a gray mixing bowl. Having bright outdoor lighting and holding the subject and camera still were extremely important in all cases.

https://www.inaturalist.org/observations/158038840
https://www.inaturalist.org/observations/158038846

The mixing bowl handled the spiders best. They walked up the side until they started to slip and then held their position. It was fairly easy to get close for a a direct dorsal photo, and the spiders were posed in a fairly flat, natural pose. However, gray was a poor choice and caused harsher shadows. Next attempt with compare the gray bowl with a white one. Fortunately the 3-bowl set I bought at Wamart included both. Ultimately, a bowl with white walls and a gray center may be best. Placing one or more 3/4" diameter stickers on the bottom will allow the spiders length to be easily scaled.

@pfau_tarleton

Hogna 'incognita' is an undescribed species found primarily in parts of Texas and Oklahoma. It is similar to Hogna antelucana and baltimoriana, and has been found co-mingled with those species in Texas and Oklahoma respectively. Link to presentation materials for Hogna 'incognita' in comparison to Hogna antelucana:

https://eaneubauer.ipower.com/lycosid/Hogna_presentation.pdf

Updated 1/27/23.

I've started compiling some county level ranges for various genera. iNat observation numbers are included so you can check my evidence. You could refer to those observations as my "range vouchers". I'll update these files periodically and add others. These are primarily worksheets which ultimately will be used to fill in a map of Texas counties.

https://eaneubauer.ipower.com/lycosid/Rabidosa_TX_County.rtf
https://eaneubauer.ipower.com/lycosid/Hogna_TX_County_I.rtf
https://eaneubauer.ipower.com/lycosid/Arctosa_TX_County.rtf

Hogna_TX_County_I doesn't include carolinesis, coloradensis or the lenta group species because field identification of these species is not advanced enough to reliably identify typical iNat observations.

Sample county level range map of Arctosa littoralis in Texas based on iNaturalist observations prepared 10/15/22:

https://eaneubauer.ipower.com/lycosid/ArctosalittoralisTXrange101522.jpg

Updated 1/27/23.