Figure 23. Minuca vicoriana

Creator

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

Preview

Identifier

Figure 23

Medium

photograph

Date Created

5-2025

Keywords

Fiddler crabs;

Description

Alt Text: Composite photograph of the Minuca victoriana 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 23. Minuca victoriana (von Hagen, 1987). UNI 168. Collected: 9 July 2009, Brazil, Espirito Santo, Vitoria, Bairro Joana D’arc mangroves (-20.283984, -40.305919). Scale Bar = 10mm. (A) Dorsal view. (B) Front view. (C) Inner cheliped. (D) Ocular view. (E) Ambulatory. (F) Color Photo. (G) Distribution Map (Finke 2024).

Species Description: Moderate sized (width < 15 mm). Carapace length 59% of width (Fig. 23A). Frontal region 33% carapace width. Eyestalks short. Surface of carapace smooth, shiny and finely granular. H-depression deep with pubescence in lateral sulcus. Carapace surface irregular near anterolateral margin. Anterolateral angles pointing outward (Fig. 23A). Intersection of lateral and posterolateral margins form sharp obtuse angle. On major cheliped, dorsal surface with ridge (Fig. 23A). Moderate-size tubercles decreasing in size toward ventral manus (Fig. 23B). A triangular depression with pubescence dorsal to origin of pollex (Fig. 23B). Dactyl and pollex blade-like, gap large (Fig. 23B, C). Dactyl articulation without tubercles. Pollex with one large tubercle in gap. Gap wide. Dactyl with several larger tubercles proximal to articulation in gap with a single large distal tubercle. On inner surface, dorsal carina of carpal cavity with elongate tubercles, terminus trifurcated (Fig. 23C). Carina extends around distal cavity margin to prominent tubercles at proximal end of oblique ridge. Structure sharply defined with clearly separate tubercles. Pre-dactyl tubercle ridge parallel to dactyl articulation. Tubercles on dactyl articulation fused. Dorsal surface of carpus in cavity with no large teeth. Merus width of ambulatory legs 1–3 about 29% length (Fig. 23E). Dorsal merus and carpus with pubescence and long setae. No setae or pubescence on ventral merus of ambulatory legs. Endemic to the coast of Brazil from Fortaleza, Ceará to Bertioga, São Paulo (Fig. 23 G).

Comments

This composite image is of the Minuca victoriana 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 168

Year Collected

2009

Collection Location

-20.283984, -40.305919

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 23. Minuca vicoriana" (2025). Fiddler Crabs Image Gallery. 21.
https://scholarworks.uni.edu/fiddlercrabs/21