(water flea) |
(gooseneck barnacle) |
Subphylum CRUSTACEA
(tree/traits: Ruppert et al. 2004 p. 540, 668, 694, Brusca & Brusca 2003 p. 580) |
(mantis shrimp) |
(amphipod) |
(calanoid copepod) |
(lobster) |
====1============================= Cl. Remipedia <<==C==| | ===3========================== Cl. Maxillopoda (copepod, ostracod, barnacle, etc.) =2==| | ==5======================= Cl. Cephalocarida =4==| | ==7=================== Cl. Branchiopoda (fairy shrimp, water fleas, etc.)$ =6==| | ==8============== SubCl. Phyllocarida (Or. Leptostraca) =Mal=| | ==9======= SubCl. Hoplocarida (mantis shrimps) =Eumal=| | ==11= SupOr. Peracarida (mysids, amphipods, isopods, etc.) =10==| ==12= SupOr. Eucarida (krill, shrimps, lobsters, crabs, etc.)
$ The Anostraca (fairy shrimp) may be the sister taxon to (remaining Branchiopoda + Malacostraca)
Back to Zool 250 tree for animal phyla or Protostomia
TRAITS SUPPORTING EACH CLADE (** plesiomorphic- a primitive state, not unique to clade):
b) first antennae uniramous** c) second antennae biramous d) mandible unbranched, 2 pair maxillae e) sessile (non-stalked), compound eyes** f) many similar, biramous, phyllopodous thoracic limbs** g) telson with rami h) nauplius larvae i) naupliar eye= 4 fused median ocelli j) 2 pair saccate nephridia only (segs. #2 & #5) b) raptorial mouth appendages c) segment #6= maxilliped d) many similar trunk segments (thorax & abdomen not distinct) with paddle-like biramous legs e) pre-antennal process f) eyes lost g) hermaphroditic b) 8 thoracic segments, maximum b) abdomen has fewer than 3 segs., no limbs c) unique naupliar eye (3-pigment cup ocelli) d) lateral compound eyes lost e) genital limbs on 1st abdomen somite of male b) abdomen has fewer than 9 segments b) abdomen of 11 segments c) segment #5= leg-like d) compound eyes lost e) hermaphroditic b) abdomen has fewer than 8 segments c) stalked, compound eyes |
(trunk segment number & limbs vary greatly) b) abdomen of 7 segments + telson c) carapace covers head & thorax** d) first antennae biramous in adult e) male gonopore on segment 8, female on segment 6 b) abdomen of 7 segments + telson** c) second maxilla resembles thoracic limbs** d) similar, phyllopodous thoracic limbs** b) abdomen of 6 segments + telson c) thoracic limbs stenopodous d) long muscular abdomen e) telson lacks rami f) uropods + telson make a tail fan b) carapace covers head & 4 thoracic segments b) first 5 thoracic limbs uniramous & subchelate c) thorax segment #2 with very large subchela d) moveable rostrum e) gills on pleopods ds b) antennal statocyst c) lacinia mobilis on left mandible only! b) thoracic oostegites form brood chamber c) pre-juvenile manca stage b) 3 pair maxillipeds (except euphausiids) c) last 5 pair thoracic limbs uniramous (except euphausiids) d) well-developed gills under carapace (except euphausiids) e) brood eggs on pleopods (except euphausiids) |