Conopea

Kolbasov, Gregory A., Chan, Benny K. K., Molodtsova, Tina N. & Achituv, Yair, 2016, Revision of the coral-inhabiting genus Conopea (Cirripedia: Archaeobalanidae) with description of two new species of the genera Conopea and Acasta, Zootaxa 4178 (2), pp. 182-208 : 206-207

Key to species of the genus Conopea

1 Tergum with broad and square apex................................................................ C. galeata

- Tergum with sharp or blunt but not square apex..............................................................2

2 Tergum with curved beak-shaped apex..................................................................... 3

- Tergum without curved beak-shaped apex.................................................................. 7

3 Plates and basis solid................................................................................... 4

- Plates and basis tubiferous.............................................................................. 5

4 Spur long, about 1/3 width of tergum............................................................. C. mjobergi

- Spur short, about ½ width of tergum................................................................. C. acuta

5 Tergum with developed crests of depressor muscle................................................... C. investita

- Tergum with reduced crests of depressor muscle............................................................. 6

6 Spur of tergum smooth, without denticles on distal end.................................................. C. fidelis

- Spur of tergum with denticles on distal end........................................... C. calceola , C. saotomensis *

7 Shell with two lateral horns at basal parts of carinolaterals 1............................................ C. cornuta

- Shell without lateral horns............................................................................... 8

8 Radii narrow, not exposed..................................................................... .. C. sinensis

- Radii broad, exposed...................................................................................9

9 External surface of parietes with dense small granules................................................ C. granulata

- External surface of parietes without granules............................................................... 10

10 Both rostral and carinal parts of basis significantly elongated.................................................. 11

- Basis not significantly elongated in carinal part............................................................. 15

11 Basal part of carina not elongated, scutum with rounded, not sinusoidal basitergal margin................ .. C. exothobasis

- Basal parts of both rostrum and carina conspicuously elongated, scutum with sinusoidal basitergal margin.............. 12

12 Shell with extremely elongated carinal and rostral basal parts conspicuously longer than central part.................. 13

- Elongated basal rostral and carinal parts of shell comparable in length with central part.............................14

13 Spur of tergum about 2/3 of width of basal margin, with truncated end..................................... C. titani

- Spur of tergum about ½ of width of basal margin, with rounded end.................................... C. margaretae

14 Rostrum shorter than carina................................................................. C. minyrostrum

- Rosrum significantly longer than carina.......................................................... C. proripiens

15 Basis solid.......................................................................................... 16

- Basis tubiferous...................................................................................... 18

16 Rostrum greatly elongated, about ½ or more of total shell length..................................... C. basicuneata

- Length of rortrum less than ½ of total length of shell......................................................... 17

17 Segments of anterior ramus of cirrus III armed with sharp denticles................................... C. sabangensis

- Segments of anterior ramus of cirrus III lack armament of sharp denticles.............................. C. cymbiformis

18 Spur of tergum not separated from basiscutal margin distinctly, cirri III, IV lack armament of sharp denticles.. .. C. scandens

- Spur of tergum separated from basiscutal margin, cirri III, IV with armament of sharp denticles............. C. willhearsti