Trapezionida

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Trapezionida
Trapezionida olivarae.jpg
T. olivarae
Scientific classification
Kingdom:
Animalia
Phylum:
Arthropoda
Subphylum:
Crustacea
Class:
Malacostraca
Order:
Decapoda
Infraorder:
Anomura
Superfamily:
Galatheoidea
Family:
Munididae
Genus:
Trapezionida

Machordom et al., 2022
Species

See text

Trapezionida is a genus of squat lobsters in the family Munididae, described in 2022 by Machordom and colleagues based on molecular phylogenetic and morphological analyses. [1] This genus was established to reclassify several species previously placed in the genus Munida , reflecting a refined understanding of the Munididae family's systematics. [1] Members of Trapezionida are typically found in deep-sea environments across various oceanic regions, including the Pacific and Australian waters. [2]

Contents

Description

Species within Trapezionida are characterized by the typical squat lobster morphology, including a flattened carapace, long slender legs, and chelipeds adapted for grasping. Specific diagnostic traits distinguishing Trapezionida from related genera like Munida include variations in carapace spines and leg proportions, though detailed descriptions vary by species. [1] For example, Trapezionida olivarae, commonly known as Olivar's Squat Lobster, is noted for its distinctive eye structure and small size, often hiding in coral rubble. [3]

Distribution

Trapezionida species are distributed across deep-sea habitats in regions such as the Ryukyu Islands, New Caledonia, and the Central Pacific. [2] Recent discoveries, such as Trapezionida hercules and Trapezionida tapina, have been reported from Central Pacific seamounts, indicating a preference for benthic, high-pressure environments. [4] The genus's wide geographic range underscores its adaptability to diverse marine ecosystems.

Species

The genus Trapezionida includes several recognized species:

References

  1. 1 2 3 Alicia Machordom; Paula C. Rodríguez-Flores; Annie Machordom & Shane T. Ahyong (2022). "Deconstructing the crustacean squat lobster genus Munida to reconstruct the evolutionary history and systematics of the family Munididae (Decapoda, Anomura, Galatheoidea)". Invertebrate Systematics . 36 (10): 926–970. doi:10.1071/IS22007.
  2. 1 2 "Trapezionida Machordom, Rodríguez-Flores, Ahyong & Macpherson, 2022". World Register of Marine Species . Retrieved February 26, 2025.
  3. ↑ "Munida olivarae - Olivar's Squat Lobster". Reeflex. Retrieved February 26, 2025.
  4. ↑ Rodríguez-Flores, Paula C. (2025). "Description of new squat lobster species from Central Pacific seamounts". Journal of Crustacean Biology. 45 (1): 12–20. doi:10.1093/jcbiol/ruaa001.
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