English: Alignment of anterior somites (body segments), tagmata and appendages across various
euarthropod taxa. Extinct taxa based on the most widely-accepted interpretations of mid 2010s.
- †: Extinct taxa
- 0: Ocular somite
- 1-2: Somite 1-10 (further somite(s) ommited)
- Dark grey: Somite(s) of head tagma (head/cephalon/prosoma)
- Red/P: Protocerebral somite/appendage
- Yellow/D: Deutocerebral somite/appendage
- Blue/T: Tritocerebral somite/appendage
†Fuxianhuiida (fuxianhuiid):
- Ce: Cephalon
- Tr: Trunk
- Hy/Lbr: Hypostome/labrum complex
- An: Antenna
- SPA: Specialized post-antennal appendage
- L: (Arthropodized) Leg/walking leg
†Megacheira (megacheiran/great appendage arthropod):
- Ce: Cephalon
- Tr: Trunk
- Hy/Lbr: Hypostome/labrum complex
- SGA: Short-great appendage
- L: (Arthropodized) Leg/walking leg
†Artiopoda (artiopodan/artiopod: trilobite, aglaspidid etc.):
- Ce: Cephalon
- Tr: Trunk
- Hy/Lbr: Hypostome/labrum complex
- An: Antenna
- L: (Arthropodized) Leg/walking leg
Chelicerata: Pycnogonida (pycnogonid/sea spider):
- Ce: Cephalon
- Tr: Trunk
- Ab: Abdomen
- ?: (Appendage unknown)
- Chf: Chelifore
- P: Palp
- Ovg: Oviger
- L: (Arthropodized) Leg/walking leg
Chelicerata: Euhelicerata (euchelicerate: "merostome" and arachnid):
- Pr: Prosoma
- Op: Opisthosoma
- Hy/Lbr: Hypostome/labrum complex
- Chr: Chelicera
- Pp: Pedipalp
- L: (Arthropodized) Leg/walking leg
Myriapoda (myriapod: centipede, millipede etc.):
- He: Head
- Tr: Trunk
- Hy/Lbr: Hypostome/labrum complex
- An: Antenna
- Inc: intercalary segment
- Mnd: Mandible
- Mx1: First maxilla
- Mx2: Second maxilla
- L: (Arthropodized) Leg/walking leg
"Crustacea" (crustacean: shrimp, crab, barnacle, waterflea etc.):
- He: Head
- Tx: Thorax
- Ab: Abdomen
- Hy/Lbr: Hypostome/labrum complex
- An1: First antenna/antennula/antennule
- An2: Second antenna/antenna
- Mnd: Mandible
- Mx1: First maxilla/maxillula
- Mx2: Second maxilla/maxilla
- L: (Arthropodized) Leg/walking leg
Hexapoda (hexapod: insect, springtail etc.)
- He: Head
- Tx: Thorax
- Ab: Abdomen
- Hy/Lbr: Hypostome/labrum complex
- An: Antenna
- Inc: intercalary segment
- Mnd: Mandible
- Mx: Maxilla
- Lbi: Labium
- L: (Arthropodized) Leg/walking leg
Panarthropod version:
Extant panarthropod version:
References:
- Overall review.
- Chelicerata, Megacheira.
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