Figure 013. Leptuca thayeri

Creator

Abby Hutchins, University of Northern IowaFollow
Amber Finke, University of Northern IowaFollow
Carl L. Thurman, University of Northern IowaFollow

Preview

Identifier

Figure 13

Medium

photograph

Date Created

5-2025

Keywords

Fiddler crabs;

Description

Alt Text: Composite photograph of the Leptuca thayeri fiddler crab which includes several black & white images of different views of the crab, a color photograph, and a distribution map.

Composite Image Description: Figure 13. Leptuca thayeri (Rathbun, 1900). UNI 151. Collected: June- 2003, USA, Florida, Monroe Co., Chokoloskee Bay, West Everglades (25.818773, -81.359583). Scale Bar = 10 mm. (A) Dorsal view. (B) Front view. (C) Inner cheliped. (D) Ocular view. (E) Ambulatory. (F) Color Photo. (G) Distribution Map (Finke 2024).

Species Description: Large species (width < 30 mm). Carapace shape near trapezoidal (Fig. 13A). Carapace length 66% width; frontal region 22% carapace width (Fig. 13A, D). Eyestalks moderate length. Lateral sides strongly angled inward Fig. 13A). Tufts of pubescence scattered along dorsal lateral margins. Dactyl and pollex 50% to 80% longer than manus (Fig. 13B,C). Pollex usually straight or bent downward, slightly (Fig. 13B). On inner surface of large cheliped, line of oval tubercles follow gap at edge of pollex (Fig. 13C). Gap moderately wide. Oblique ridge progresses to carpal cavity. It turns and follows carpal cavity a short distance. Merus segments of walking leg unusually wide; width (Fig. 13E). Merus width about 50% length; 56% in females, 47% in males. Pantropical species, found from south Florida and Yucatan peninsulas to Florianopolis, Brazil (Fig. 13G).

Comments

This composite image is of the Leptuca thayeri fiddler crab. It is a part of the parent Fiddler Crabs Image Gallery collection at the University of Northern Iowa, which has images of Fiddler Crabs located in the Atlantic Ocean and the Gulf of Mexico from the following genera: Afruca, Leptuca, Minuca, and Uca.

Object Description

1 PNG file

UNI Specimen Number

UNI 151

Year Collected

2003

Collection Location

25.818773, -81.359583

Gender

male

Copyright

©2025 Abby Hutchins, Amber Finke, and Carl L. Thurman

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License

Type

Image

Language

en

File Format

image/png

Recommended Citation

Hutchins, Abby; Finke, Amber; and Thurman, Carl L., "Figure 013. Leptuca thayeri" (2025). Fiddler Crabs Image Gallery. 6.
https://scholarworks.uni.edu/fiddlercrabs/6