Munididae

Distinguished from other squat lobster families by: trispinose frontal edge of carapace; presence of a central rostrum; and two spines projecting forward from above the eyes. Species-level identification often requires examination of telson anterolateral lobe shape and the shape and setation of dactyli on pereopods 2–4. Some genera (e.g., Raymunida) show distinctive abdominal somite striation patterns and maxilliped spine arrangements.

Predominantly deep-water marine environments, with most species occurring on continental slopes and in bathyal zones (200–1000+ m depth). Some species enter shallower waters; a few occur on continental shelves (<200 m). Habitats include seamounts, coral associations (e.g., with scleractinian corals such as Eguchipsammia fistula), and chemosynthetic environments. Depth strongly influences egg size and larval development duration.

Global distribution in marine waters. Documented from: southwestern Pacific (Norfolk Ridge, Australia, Philippines, Taiwan), Central Pacific seamounts, eastern Pacific, Caribbean Sea (Colombian coast), South Atlantic (Brazilian coast), South Africa (west and east coasts), Red Sea, Mediterranean (Pliocene fossil record from Italy), Ryukyu Islands (Japan), and Indonesian waters.

• Eguchipsammia fistula - habitat associationMunida tuerkayi found associated with live colonies of this scleractinian coral at 320 m depth in the Red Sea
• bopyrid isopods - parasitePseudionine bopyrids parasitize munidid squat lobsters in Philippine waters; isopod parasites also reported from Agononida longipes in Colombian Caribbean (3.1% parasitism)
• rhizocephalan barnacles - parasiteReported from Agononida longipes in Colombian Caribbean (1.0% parasitism)

Embryos incubated by ovigerous females; egg size and lipid content vary seasonally and with depth. Pleuroncodes monodon shows prolonged reproductive period from winter through summer (February–December in southeastern Pacific). Egg counts highly variable: Agononida longipes averages 1360 eggs per female (range 100–5953), with eggs elliptical (~0.56 × 0.52 mm). Egg size in Munididae generally smaller than in Munidopsidae (mean ~0.48 mm vs. ~1.12 mm), with higher egg numbers. Larval development duration influenced by habitat depth.

Pleuroncodes monodon is an important fishery resource in the Humboldt Current Large Marine Ecosystem, with seasonal variation in biochemical composition affecting food web dynamics and fishery exploitation. Some species support deep-sea coral reef communities as associated fauna.

• GalatheidaeFormerly included many Munididae genera; separated in 2010. Galatheidae are mostly shallow-water taxa, whereas Munididae are predominantly deep-water. Morphologically distinguished by carapace frontal margin structure.
• MunidopsidaeRelated family of squat lobsters differing in reproductive strategy: Munidopsidae produce fewer, larger eggs (~13 eggs, ~1.12 mm) compared to Munididae (~554 eggs, ~0.48 mm). Both families share common ancestry reflected in larval and adult morphology.

• deep-sea
• squat lobster
• cryptic speciation
• Anomura
• Galatheoidea
• continental slope
• seamount fauna
• egg size
• depth gradient
• fishery resource
• coral associate
• parasite host

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• The Agononida incerta species complex unravelled (Crustacea: Decapoda: Anomura: Munididae)
• Biology and Distribution of Agononida longipes (Crustacea, Decapoda, Munididae) in the Colombian Caribbean Sea
• A new squat lobster (Crustacea, Anomura, Munididae) from the Pliocene of Monterotondo Marittimo (Tuscany, Italy)
• A new species of squat lobster of the genus Munida (Galatheoidea, Munididae) from the Red Sea
• Raymunida Macpherson &amp; Machordom, 2000 (Crustacea: Decapoda: Anomura: Munididae) from the KUMEJIMA 2009 Expedition in the Ryukyu Islands, Japan
• New species of deep-sea Galatheoidea (Anomura: Galatheidae, Munididae, Munidopsidae) from Central Pacific seamounts, with remarks on their phylogenetic placement, habitat associations, and significance for the biogeography of squat lobsters
• Biodiversity and Distribution of Squat Lobster of the Family Munididae Ahyong, Baba, Macpherson & Poore, 2010 (Crustacea: Decapoda: Anomura: Galatheoidea) in Some Areas in Indonesia
• Additions and revisions to the family Munididae (Anomura: Galatheoidea) from South Africa, with description of a new species
• Spatial distribution and egg production in squat lobsters (Decapoda: Munididae, Munidopsidae) from the collection of the Museu de Zoologia of the Universidade de São Paulo, Brazil
• New records and hosts for three species of pseudionine bopyrids (Crustacea: Isopoda: Bopyridae) parasitizing munidid squat lobsters (Crustacea: Anomura: Munididae) in Philippine waters
• Spatial distribution and size structure of the squat lobster Agononida longipes (A. Milne Edwards, 1880) (Crustacea: Decapoda: Galatheoidea: Munididae) in the Colombian Caribbean
• Temporal variation in the fatty acid composition of ovigerous females and embryos of the squat lobsterPleuroncodes monodon(Decapoda, Munididae)
• Seasonal changes in the biochemical composition of females and offspring of red squat lobster, Pleuroncodes monodon (Decapoda, Munididae), from the Southeastern Pacific