Tanypodinae, Skuse, 1889

Cranston, Peter S., 2007, The Chironomidae Larvae Associated With The Tsunami-Impacted Waterbodies Of The Coastal Plain Of Southwestern Thailand, Raffles Bulletin of Zoology 55 (2), pp. 231-244 : 233

Key to genera of larval Tanypodinae found

1. Body segments bearing lateral longitudinal dense setal fringe ( Fig. 1 , fr). Mentum (technically dorsomentum) distinct, toothed ( Fig. 7 , m) ............................................................................ 2

– Body segments lacking setal fringe. Mentum or dorsomentum indistinct, not toothed ( Fig. 15 , m) ..... 4 (tribe Pentaneurini )

2. Dorsomental teeth weak, not aligned on plate ( Fig. 2 , dmt). Mandible strongly hooked ( Fig. 3 , md) ........... Clinotanypus

– Dorsomental teeth strong at margin of plate ( Fig. 7 ). Mandible straight to curved, never hooked ( Fig. 6 ) ............................ 3

3. Ligula with median tooth largest, all teeth directed anteriorly ( Fig. 4 ); pecten hypopharyngis absent. Mandible squat, with expanded base and short apical tooth ....................... Tanypus

– Ligula with median tooth smaller than medially-curved sublateral teeth ( Fig. 5 ); pecten hypopharyngis present ( Fig. 5 ph). Mandible with many spine-like teeth (arrowed) on mesal surface ( Fig. 6 ), without distinct basal tooth .... Fittkauimyia

4. Basal segment of maxillary palp divided into 2 or more sections ( Fig. 8 , mp) .......................................................................... 5

– Basal segment of maxillary palp simple, undivided ( Fig. 9 ). ............................................................................................... 6

5. Submentum with seta S 10 linearly aligned with S Sm and S 9 setae, with VP lying posterolateral to that alignment ( Fig. 10 ). Division of maxillary palp into 2 sections at about 1/3 from segment base ........................................................ Paramerina

– Submentum with S Sm nearly aligned with VP and S 10 seta, with S 9 anteromedial to that alignment ( Fig. 11 ). Basal palp segment divided into 2–5 sections ( Fig. 8 ); if only 2 sections, then division is anterior to basal 1/3 ................. Ablabesmyia

6 One claw of posterior parapod dark, with inner teeth ( Fig. 12 ). VP more posterior than any ventral cephalic seta ( Fig. 13 ) .. ............................................................................ Monopelopia

– All claws of posterior parapod pale, simple. S Sm far posterior to VP ( Fig. 14 ) ............................................................. Larsia

Figures

Figs. 1–12. Thai post-tsunami Chironomidae. Clinotanypus sp.: 1, lateral body setal fringe; 2, dorsomentum; 3, ventral head (anterior). Tanypus sp.: 4, ligula. Fittkauimyia sp.: 5, ligula, pecten hypopharyngis; 6, mandible; 7, mentum. Ablabesmyia sp.: 8. maxillary palp. Monopelopia sp.: 9, maxillary palp. Ventral head setae and pit of: 10, Paramerina sp., 11, Ablabesmyia sp. Monopelopia sp.: 12, posterior parapod claw. Abbreviations: ant, antenna; dmt, dorsomentum teeth; fr, fringe; lig, ligula; m, mentum; md, mandible; mp, maxillary palp; ph, pecten hypopharyngis; RO, ring organ of maxilla; SSm, seta submenta; S9, S10, cephalic setae 9, 10; VP, ventral pit.

Figs. 13–25. Thai post-tsunami Chironomidae. Ventral head setae and pit: 13, Monopelopia sp., 14, Larsia sp. Larsia sp.: 15, mentum; 16, pupal thoracic horn. Parakiefferiella sp.: 17, mentum; 18, antenna; 19, mandible. Menta: 20, Tanytarsus formosanus; 21, Zavreliella sp. Antennae: 22, Tanytarsus formosanus; 23, Tanytarsus ‘Thai 1’; 24, Tanytarsus ‘Thai 2’; 25, Zavreliella sp. Abbreviations: LO, Lauterborn organ; m, mentum; sm, submentum; SSm,seta submenta; S9, S10, cephalic setae 9, 10; vmp, ventromental plate; VP, ventral pit.