Crispatotrochus, Tenison Woods, 1879

Kitahara, Marcelo V. & Cairns, Stephen D., 2008, New records of the genus Crispatotrochus (Scleractinia; Caryophylliidae) from New Caledonia, with description of a new species, Zootaxa 1940 (1), pp. 59-68 : 62-63

Key to the Recent species of Crispatotrochus

1 Septa arranged hexamerally.........................................................................................................................2

- Septa arranged decamerally.......................................................................................................................11

2 Pedicel unattached; corallum cornute ................................................................... Crispatotrochus curvatus

- Pedicel attached; ceratoid to turbinate.........................................................................................................3

3 S1 larger than S2..........................................................................................................................................4

- S1 equal in width to S2................................................................................................................................5

4 Theca transverse ridged; S1 and S2 sinuous .......................................................... Crispatotrochus rugosus

- Theca not transversed ridge; S1 and S2 not sinuous ................................. Crispatotrochus septumdentatus

5 S1–2 with sinuous inner edges....................................................................................................................6

- S1–2 with straight inner edges.....................................................................................................................9

6 S3 with sinuous inner edges........................................................................................................................7 - S3 with straight inner edges..................................................................................... Crispatotrochus cornu

7 Columella fused, composed of closely united, poorly defined, twisted ribbons Crispatotrochus irregularis

- Columella with well defined columellar elements......................................................................................8

8 Septa arranged in four complete cycles; fossa nonextant ............................. Crispatotrochus galapagensis

- Septa arranged in five (complete) or six (incomplete) cycles; fossa moderately deep.................................. ............................................................................................................................ Crispatotrochus rubescens

9 Costae absent .......................................................................................................... Crispatotrochus niinoi

- Costae present (ridged or flat) .................................................................................................................. 10

10 Columella composed of 4–7 broad, twisted laths; S5 present; costae slightly ridged near calicular edge.... ..................................................................................................................................... Crispatotrochus foxi

- Columella composed of 28–32 narrow, twisted laths; S5 absent; costae flat ...... Crispatotrochus inortatus

11 S1 exsert.....................................................................................................................................................12

- S1 nonexsert .......................................................................................................... Crispatotrochus squiresi

12 Last septal cycle with serrate to lacerate inner edges................................................................................13

- Last septal cycle with entire inner edges..................................................................................................14

13 GCD = 6................................................................................................................. Crispatotrochus woodsi

- GCD> 6........................................................................................... C. sp. cf. C. cornu sensu Cairns, 1979

14 Adult stage with more than 3 cycles of septa (>40 septa) ................................. Crispatotrochus gregarius

- Adult stage with three cycles of septa (= 40 septa) ......................................... C. sp. A sensu Cairns, 1982