Belongs within: Gammaroidea.
Contains: Acanthogammarus.
The Acanthogammaridae are a family of amphipods with sexually dimorphic gnathopods, endemic to Lake Baikal (Lowry & Myers 2013).
Characters (Lowry & Myers 2013): Body laterally compressed or subcylindrical. Eyes well developed or absent, if present then round or ovoid. Antennae 1–2 calceoli absent. Antenna 1 longer than antenna 2; peduncular article 1 longer than article 2; article 2 subequal to or longer than article 3; article 3 shorter than article 1; peduncular articles 1–2 not geniculate; accessory flagellum short or minute. Antenna 2 peduncular article 1 enlarged, bulbous. Mandible palps symmetrical; 3–articulate. Maxilla 1 basal endite setose along medial margin or apically setose; palps symmetrical. Maxilla 2 basal endite without oblique setal row. Coxal gills on pereopods 2–7, not stalked; sternal gills absent; sternal blisters absent; oostegites fringing setae simple. Gnathopod 1 subchelate; dissimilar in males and females (sexually dimorphic); similar in size to gnathopod 2; propodus palm without robust setae along palmar margin. Gnathopod 2 subchelate; dissimilar in males and females (sexually dimorphic); carpus not produced along posterior margin of propodus, projecting between merus and propodus. Pereopods 3–4 not sexually dimorphic. Pereopods 3–4 not sexually dimorphic. Pereopod 4 with well developed posteroventral lobe or without posteroventral lobe. Pereopod 5 shorter than pereopod 6 or subequal in length to pereopod 6; coxa equilobate or with posteroventral lobe. Pereopod 7 subequal in length to, or longer than pereopod 5. Pleonites 1–3 each with or without dorsal carina or carinae. Pleopods well developed, biramous. Urosomites 1–3 free; without slender or robust dorsal setae. Urosomite 1 without large distoventral robust seta. Urosomite 2 without dorsal setae. Uropod 1 without basofacial robust setae. Uropod 3 not sexually dimorphic; biramous, with plumose setae; endopod subequal in length to exopod; exopod longer than peduncle, 1-articulate. Telson deeply cleft, moderately cleft or weakly cleft.
<==Acanthogammaridae
| i. s.: Spinacanthus Dorog. 1931B77
| |--*S. armatus (Dyb. 1874) [=Gammarus armatus]B77
| `--S. insularisB50
| Andrussovia Derzhavin 1927B77
| |--*A. sokolovi Derzhavin 1927B77
| `--A. bogacevi Derzhavin 1927BWW93
| Hellenis saltatorius Petumnikov 1914BWW93
|--Abyssogammarus Sowinski 1915B77 [AbyssogammarinaeLM13]
| |--*A. sarmatus (Dyb. 1874)B77 [=Gammarus sarmatusB77; incl. A. sarmatus var. echinatusB50]
| |--A. calceolatusB50
| |--A. gracilisB50
| |--A. hydiaeB50
| |--A. kusnezowiB50
| `--A. leptocerusB50
|--Eulimnogammarus Bazikalova 1945LM13 [incl. Philolimnogammarus Bazikalova 1945B77; EulimnogammarinaeLM13]
| |--E. cyaneusVVP01
| `--E. obtusatus [=Gammarus obtusatus]B77
|--HyalellopsinaeLM13
| |--Hyalellopsis Stebbing 1899LM13
| | |--*H. czerniavski (Dyb. 1874) [=Gammarus czerniavski]B77
| | |--H. clavataB50
| | |--H. depressirostrisB50
| | `--H. griseaB50
| `--Gammarosphaera Bazikalova 1936LM13
| `--*G. insularis Baz. 1945B77
|--ParapallaseinaeLM13
| |--Palicarinus Barnard & Barnard 1983LM13
| |--Parapallasea Stebbing 1899LM13
| | |--*P. borowskii (Dyb. 1874) [=Gammarus borowskii]B77
| | `--P. puzylliB50
| | |--P. p. puzylliB50
| | `--P. p. carinulataB50
| `--Ceratogammarus Sowinsky 1915LM13
| |--*C. dybowski Sowinski 1915B77
| `--C. acerusB50
|--PoekilogammarinaeLM13
| |--Bathygammarus Bazikalova 1945LM13
| |--Gymnogammarus Sowinsky 1915LM13
| |--Inobsequentus Takhteev 2000LM13
| |--Nyctoporea Kamaltynov 2001LM13
| |--Rostrogammarus Bazikalova 1945LM13
| |--Poekilogammarus Stebbing 1899LM13
| | `--*P. pictus (Dyb. 1894) [=Gammarus pictus]B77
| `--Onychogammarus Sowinsky 1915LM13
| `--O. (Variogammarus Takhteev 1995)LM13
|--PlesiogammarinaeLM13
| |--Koshovia Bazikalova 1975LM13
| |--Sentogammarus Kamaltynov 2001LM13
| |--Supernogammarus Kamaltynov 2001LM13
| |--Garjajewia Sowinsky 1915LM13
| | |--*G. cabanisi (Dyb. 1874) [=Acanthogammarus cabanisi]B77
| | `--G. dogieliB50
| |--Paragarjajewia Bazikalova 1945LM13
| | `--*P. petersi (Dyb. 1814) [=Gammarus petersi]B77
| `--Plesiogammarus Stebbing 1899LM13
| |--*P. (Plesiogammarus) gersteckeri (Dyb. 1874) [=Gammarus gersteckeri]B77
| `--P. (Caecogammarus Kamaltynov 2001)LM13
|--CarinogammarinaeLM13
| |--Aspretus Kamaltynov 2001LM13
| |--Asprogammarus Bazikalova 1975LM13
| |--Eremogammarus Kamaltynov 2001LM13
| |--Smaragdogammarus Bazikolova 1975LM13
| |--Echiuropus Sowinsky 1915LM13
| | `--*E. morawitzi (Dyb. 1874) [=Brandtia morawitzi]B77
| |--Pseudomicruropus Bazikalova 1961LM13
| | `--*P. rotundulatus Baz. 1945B77
| `--Carinogammarus Stebbing 1899LM13
| |--*C. cinnamomeus (Dyb. 1874) [=Gammarus cinnamomeus]B77
| `--C. mucronatusD56
|--OdontogammarinaeLM13
| |--Bazikalovia Takhteev 2000LM13
| |--Berchinia Kamaltynov 2001LM13
| |--Profundalia Kamaltynov 2001LM13
| |--Tengisia Kamaltynov 2001LM13
| |--Odontogammarus Stebbing 1899LM13
| | |--*O. calcaratus (Dyb. 1874) [=Gammarus calcaratus]B77
| | |--O. brevipesB50
| | |--O. demianowicziB50
| | |--O. improvisusB50
| | |--O. korotnewiB50
| | |--O. margaritaceusB50
| | `--O. pulcherrimusB50
| |--Heterogammarus Stebbing 1899LM13 [incl. Corophiomorphus Bazikalova 1945B77, Eurybiogammarus Bazikalova 1945B77]
| | `--*H. sophianosi (Dyb. 1874) [=Gammarus sophianosi]B77
| |--Lobogammarus Bazikalova 1945LM13
| | |--*L. latus Bazikalova 1945B77
| | `--L. andrussowi (Sars 1896) [=Gammarus andrussowi]B77
| |--Macropereiopus Sowinsky 1915LM13
| | `--*M. albulus (Dyb. 1874) [=Gammarus albulus]B77
| `--Ommatogammarus Stebbing 1899LM13
| |--*O. (Ommatogammarus) albinus (Dyb. 1874) [=Gammarus albinus]B77
| |--O. (Abludogammarus Karaman 1980)LM13
| `--O. (Pretiositus Kamaltynov 2001)LM13
`--AcanthogammarinaeLM13
|--Brachyuropus Stebbing 1899LM13
| `--B. nassonowiB50
|--Cornugammarus Kamaltynov 2001LM13
|--Dedyuola Kamaltynov 2001LM13
|--‘Diplacanthus’ Kamaltynov 2001 non Agassiz 1844LM13
|--Dorogostaiskia Kamaltynov 2001LM13
|--Isskyogammarus Chevreux 1908LM13
|--Metapallasea Bazikalova 1959LM13
|--Oxyacanthus Kamaltynov 2001LM13
|--Boeckaxelia Schellenberg 1940LM13
| |--*B. carpenteri [=Gammarus carpenteri]B77
| | |--B. c. carpenteriB50
| | |--B. c. elegansB50
| | `--B. c. profundalisB50
| |--B. castaneaB50
| `--B. potaniniB50
|--Brandtia Bate 1862LM13
| |--*B. lataB77
| `--B. fasciatoidesB50
|--Carinurus Sowinsky 1915LM13
| |--*C. reissmeri (Dyb. 1874) [=Gammarus reissmeri]B77
| `--C. solskiiB50
| |--C. s. solskiiB50
| `--C. s. obscurusB50
|--Cheirogammarus Sowinsky 1915LM13
| `--*C. inflatus Sowinski 1915B77
|--Coniurus Sowinsky 1915LM13
| `--*C. radoachkowski (Dyb. 1874) [=Gammarus radoachkowski]B77
|--Dorogammarus Bazikalova 1945LM13
| `--*D. castaneus (Dorog. 1930) [=Axelboeckia castanea]B77
|--Eucarinogammarus Sowinsky 1915LM13
| `--*E. wagii (Dyb. 1874) [=Gammarus wagii]B77
`--AcanthogammarusB77
*Type species of generic name indicated
References
[B77] Bousfield, E. L. 1977. A new look at the systematics of gammaroidean amphipods of the world. Crustaceana Suppl. 4: 282–316.
[BWW93] Briggs, D. E. G., M. J. Weedon & M. A. Whyte. 1993. Arthropoda (Crustacea excluding Ostracoda). In: Benton, M. J. (ed.) The Fossil Record 2 pp. 321–342. Chapman & Hall: London.
[B50] Brooks, J. L. 1950. Speciation in ancient lakes. Quarterly Review of Biology 25: 30–60.
[D56] Dawes, B. 1956. The Trematoda with special reference to British and other European forms 2nd ed. University Press: Cambridge.
[LM13] Lowry, J. K., & A. A. Myers. 2013. A phylogeny and classification of the Senticaudata subord. nov. (Crustacea: Amphipoda). Zootaxa 3610: 1–80.
[VVP01] Väinölä, R., J. K. Vainio & J. U. Palo. 2001. Phylogeography of “glacial relict” Gammaracanthus (Crustacea, Amphipoda) from boreal lakes and the Caspian and White Seas. Canadian Journal of Fisheries and Aquatic Science 58: 2247–2257.