Riethia, Kieffer, 1917

Cranston, Peter S., 2019, Riethia (Kieffer 1917) (Diptera: Chironomidae) revised for the Austro-Pacific region, Zootaxa 4646 (3), pp. 461-500 : 496-497

publication ID

https://doi.org/ 10.11646/zootaxa.4646.3.3

publication LSID

lsid:zoobank.org:pub:25CA4A18-955F-4EA7-8978-E93032B54A2E

persistent identifier

https://treatment.plazi.org/id/B3370110-9B1C-1E44-C68C-FEA1FA3431F5

treatment provided by

Plazi

scientific name

Riethia
status

 

Key to Riethia View in CoL View at ENA species

Adult male ( R. paluma unknown)

1 Legs banded......................................................................................... 2

- Legs pale, unbanded................................................................................... 5

2 Gonostylus short and triangular, tapering to point ( Fig. 1E View FIGURE 1 ). Superior volsella simple lobe without digitus ( Fig. 2K View FIGURE 2 )............................................................................................. stictoptera Kieffer View in CoL

- Gonostylus elongate oval. Superior volsella with digitus...................................................... 3

3 Digitus of superior volsella narrow at base, dilate medially. Inferior volsella with pectinate setae ( Fig. 2F View FIGURE 2 ) neocaledonica View in CoL sp.n.

- Digitus of superior volsella broadest at base, tapering. Inferior volsella lacks pectinate setae.......................... 4

4 Digitus of superior volsella broad, tapered to tooth ( Fig. 2B View FIGURE 2 ). Wing with dark band.................... cinctipes Freeman View in CoL

- Digitus of superior volsella tapered evenly to rounded apex ( Fig. 2C View FIGURE 2 ). Wing plain, unpigmented.......... donedwardi View in CoL sp.n.

5 Some setae on inner margin of gonostylus apically plumose ( Fig. 1C, D View FIGURE 1 )......................................... 6

- All gonostylar setae simple ( Fig. 1A, B, E, F View FIGURE 1 )............................................................... 7

6 Gonostylus attenuated, apex abruptly angled ( Fig. 1C View FIGURE 1 )............................................. phengari View in CoL sp.n.

- Gonostylus tapered conventionally ( Fig. 1D View FIGURE 1 ).................................................. plumosa Freeman View in CoL

7 Digitus of superior volsella with 1 pectinate scale ( Fig. 2L View FIGURE 2 )...................................... wazeylandica View in CoL sp.n.

- Digitus without pectinate setae........................................................................... 8

8 Inferior volsella with only simple setae ( Fig. 2G View FIGURE 2 ).................................................. noongar View in CoL sp.n.

- Inferior volsella with several pectinate scales ( Fig. 2D, E, F View FIGURE 2 )................................................... 9

9 Inferior volsella distally bare, with 3 pectinate scales ( Fig. 1B View FIGURE 1 , 2D View FIGURE 2 )................................ hamodivisa View in CoL sp.n.

- Inferior volsella microtrichiose, with 5–7 pectinate scales.................................................... 10

10 Digitus of superior volsella slender from base, bearing 2 long setae; inferior volsella setose from base ( Fig. 2E View FIGURE 2 )..................................................................................................... kakadu View in CoL sp.n.

- Digitus of superior volsella broad at base, lobe bearing 3–10 short setae ( Figs 2A, K, L, M View FIGURE 2 ). Inferior volsella bare at base..................................................................................................... 11

11 Pseudovolsella a prominent lobe ( Fig. 1F View FIGURE 1 , 2M View FIGURE 2 ). New Zealand.................................... zeylandica Freeman View in CoL

- Pseudovolsella absent (no more than inner contour of gonocoxite). Australia..................................... 12

12 Inferior volsella with pectinate setae subapical on ridge, on same plane as superior volsella ( Fig. 2J View FIGURE 2 )...................................................................................................... queenslandensis View in CoL sp.n.

- Inferior volsella curved, broad, lacking ridge, more ventral than superior volsella ( Fig. 2A View FIGURE 2 ).............. azeylandica View in CoL sp.n.

Pupa

1. Hook row on tergite II medially divided ( Fig. 3G View FIGURE 3 )........................................................... 2

- Hook row on tergite II complete.......................................................................... 3

2. Conjunctival spinule bands continuous ( Fig.3G View FIGURE 3 ). TII and III near infilled with spinules, VI with paired posterior patches of spinules ( Fig. 3G View FIGURE 3 )........................................................................ hamodivisa View in CoL sp.n.

- Conjunctival spinule bands interrupted. TII without spinules, III with very reduced pattern, VI posteriorly bare...................................................................................................... paluma View in CoL sp.n.

3. Conjunctival spinule bands on III and IV, V bare ( Fig. 3D View FIGURE 3 )..................................................... 4

- Conjunctival spinule bands on III, IV & V ( Fig. 3E, F View FIGURE 3 )....................................................... 10

4. Conjunctival spinule bands both medially interrupted ( Fig. 3H View FIGURE 3 )........................................ kakadu View in CoL sp.n.

- Conjunctival spinule bands continuous ( Fig. 3D View FIGURE 3 )............................................................ 5

5. Tergite II broadly spinulose, with anterior broad transverse spinule area extending to wide postero-median area ( Fig. 3D View FIGURE 3 )....................................................................................................... 6

- Tergite II with few spinules, restricted to postero-median area.................................................. 9

6. Cephalic area without warts ( Fig. 3A View FIGURE 3 )..................................................................... 7

- Cephalic area with distinct warts ( Fig. 3B View FIGURE 3 )................................................................. 8

7. Tergites mid-brown. Comb with subdominant spines ( Fig. 3I View FIGURE 3 )..................................... azeylandica View in CoL sp.n.

- Tergites almost translucent. Comb with one dominant spine ( Fig. 4J View FIGURE 4 )................................. phengari View in CoL sp.n.

8. TVII ( Fig. 4A View FIGURE 4 ) and all sternites bare. Cephalic warts separated at base, tapering ( Fig. 3B View FIGURE 3 ).................. noongar View in CoL sp.n.

- TVII spinulose ( Fig. 4M View FIGURE 4 ), sternites VI–VII spinulose in posterior 1/3, VIII less so ( Fig. 4N View FIGURE 4 ). Cephalic warts rounded, near contiguous from base to rounded apex.................................................... queenslandensis View in CoL sp.n.

9. Pedes spurii B on II ( Fig. 4D View FIGURE 4 ). Tergite II with spinule area narrower than hook row ( Fig. 4D View FIGURE 4 )........... stictoptera Kieffer View in CoL

- Pedes spurii B absent. Tergite II with spinule area as wide as hook row ( Fig. 4C View FIGURE 4 )...................... plumosa Freeman View in CoL spinulose ( Fig. 3E View FIGURE 3 )........................................................................ cinctipes Freeman View in CoL - Conjunctival spinule bands clearly separated from posterior tergal spines. Tergite VIII and anal lobe with few or no spinules ( Fig. 3F View FIGURE 3 )........................................................................................... 11

11. Conjunctival spinule bands on III, IV & V c.10 spines deep, dense and broad ( Fig. 3F View FIGURE 3 )................. donedwardi View in CoL sp.n.

- Conjunctival spinule bands on III and IV 3–5 spinules deep, sparse and bands narrower; on V sparser, narrower ( Fig. 4L View FIGURE 4 )..................................................................................................... 12

12. Conjunctival spinule band on V clearly divided medially ( Fig. 4L View FIGURE 4 ). Exuviae golden-brown, with dark apophyses. New Caledonia.................................................................................. neocaledonica View in CoL sp.n.

- Conjunctival spinule band on V sparse, continuous. Exuviae pale, with indistinct apophyses......................... 13

13. Segment V with L setae simple ( Fig. 4O View FIGURE 4 ). New Zealand........................................ zeylandica Freeman View in CoL

- Segment V with 3 L setae all taeniate. Western Australia ........................................ wazeylandica View in CoL sp.n.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Chironomidae

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