The diversity of marine gammaridean amphipods in Thai Waters
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The diversity of marine gammaridean amphipods in Thai
Waters
Koraon WongkamhaengDepartment of Biology
Prince of Songkla University
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Pelagic
Epibenthic
Symbiotic
Endobenthic
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Epibion
Cryptobion
Parbion
Peribion
(Shirayama and Horikoshi, 1982)
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Amphipods Ecology and distribution
Nestler
Inquiline Domicolous
Fossorial Planktonic
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General characters
Gammaridea: shrimplike bodies, eyes normal size, thoracic legs with coxal plates, abdomens strong, three pairs of uropod are well developed with rami, primarily benthic or are found to be pelagic species only 20 percent
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Gnathopod types
A. simple B. filliform C. large subchelate D. small subchelate E. complex subchelate F. carpochelate G. chelate H. small chelate I. large chelate (Modified from Bousfield, 1983 )
A. B. C.
D. E. F.
G. H. I.
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Mouthparts
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Amphipods feeding ecologySuspension feeders
Grazers
Omnivores
Detritus feeders
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Thai WatersThai Waters
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14http://www.kc-denmark.dk/public_html/p20.htm
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Collecting samplesCollecting samples
SortingSorting
Amphipods IdentificationAmphipods
Identification
Amphipods dissecting and drawing picture
Amphipods dissecting and drawing picture
Morphological analysis and
phylogenetic tree constructing
Morphological analysis and
phylogenetic tree constructing
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Some common marine Some common marine gammaridean gammaridean amphipodsamphipods
Ampelisca bocki Ampelisca cyclops iyoensis Anamixis kateluensis
Paradusa bilobataAmpithoe valida
Grandidierella megnae
Cerapus yuyatalay Gammaropsis atlanticus
Grandidierella gilesi
Victoriopisa sp A Cheiriphotis megacheles
Colomastrix pusilla Idullnella janisae Leucothoe furina Tethegeneia khanomensis
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Marine GammaridsRecorded from
Thai Waters
Family Species
1 Ampeliscidae 1 Ampelisca brevicornis 2 Ampelisca bocki 3 Ampelisca chinensis 4 Ampelisca cyclops iyoensis 5 Ampelisca honmungensis
6 Byblis sp.2 Amphilochidae 7 Gitanopsis sp.A3 Ampithoidae 8 Ampithoe rachanoi
9 Ampithoe africana10 Ampithoe valida11 Ampithoe ramondi12 Cymadusa vadosa
13 Paradusa bilobata4 Anamixidae 14 Anamixis kateluensis 15 Paranamixis sp. A5 Aoridae 16 Grandidierella gilesi
17 Grandidierella gravipes 18 Grandidierella bonnieroides19 Grandidierella megnae 20 Grandidierella halophilus21 Grandidierella sp.22 Cerapus chaomai 23 Cerapus yuyatalay 24 Gammaropsis afer 25 Gammaropsis atlanticus 26 Gammaropsis abbotti
27 Lembos sp. A6 Colomastigridae 28 Colomastrix pusilla7 Corophiidae 29 Corophium volutator
30 Cheiriphotis megacheles 31 Cheiriphotis sp.A8 Deaxaminidae 32 Paradexamine setigera 9 Eusiridae 33 Tethegeneia khanomensis10 Hadzaiidae 34 Dulichiella fresnelii
35 Elasmopus puteus 36 Eriopisella sp.A
37 Eriopisella sechellensis
21 Families
42 Genera
72 Species
2 new species and 16 new record
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Marine GammaridsRecorded from
Thai Waters
Family Species10 Hadzaiidae 38 Quadrimaera sp.A
39 Quadrivisio bengalensis 40 Victoriopisa chilkensis
41 Victoriopisa sp A11 Hyalidae 42 Parhyale hawaiensis 43 Parhyale aquilina12 Isaeidae 44 Ampelisciphotis tridens
45 Dodophotis digitata 46 Gammaropsis togoensis 47 Photis longicaudata48 Photis longimanus
49 Photis sp.A13 Ischyroceridae 50 Ericthonius pugnax 51 Jassa falcata 14 Leucothoidae 52 Leucothoe alcyone
53 Leucothoe furina 54
Leucothoe germalcyone
55 Leucothoe spinicarpa 15 Liljeborgiidae 56 Idullnella janisae
57 Idullnella serra 58 Idullnella sp. A
59 Listriella longipalma 16 Lysianassidae 60 Lysianassa coelocheir 17 Oedicerotidae 61 Monoculodes sp.
62 Perioculodes logimanus63 Perioculodes sp.
64 Synchelidium tropicalis 18 Paracalliopiidae 65 Paracalliope indica 19 Phoxocephalidae 66 Hapiniopsis sp. A
67 Prohapinia sp. A 68 Mandibulophoxus macrocoxa 20 Podoceridae 69 Podocerus andamanensis21 Urothoidae 70 Urothoe gelasina
71 Urothoe platydactyla 72 Urothoe spinigitus
21 Families
42 Genera
72 Species
2 new species and 16 new record
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Occurrence of Marine Gammaridean Occurrence of Marine Gammaridean Amphipods in Thai watersAmphipods in Thai waters
http://animaldiversity.ummz.umich.edu/site/glossary/page/g_h.html
Distribution Percentage
Cosmopolitant 4
Endemic Thai Waters 36
Indo-Pacific 26
oriental 21
Palearctic 1
Tropical 11
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Occurrence of Marine Gammaridean Occurrence of Marine Gammaridean Amphipods in Thai watersAmphipods in Thai waters divided by habitatsdivided by habitats
Habitat species percentage
coral reef 23 31.9
seagrass 24 33.3
soft bottom 15 20.8
estuary 9 12.5
salt pan 1 1.4
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Marine gammaridean amphipods feeding types
Feeding typecoral reef estuary salt pan seagrass
soft bottom
Total species
deposit feeder 10 3 3 5 21
grazer 1 1 14 16
inquiline 1 1 4 6
predator 3 3
suspension feeder 8 5 1 6 6 26
Total species 23 9 1 24 15 72
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Tethegeneia khanomensis
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Grandidierella halophilus
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Conclusion & Recommendation
• Amphipodologists need to specialize on specific family level• Expeditions should be advised to collect more surface flotsam to
discover other amphipods being dispersed in this manner• Application of extensive specialized collecting methods would be
very profitable (sponges, tunicates, etc)
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Thank you for attention