Sinoscalpellum, Xian-Qiu & Zhong-Li, 2014

Xian-Qiu, Ren & Zhong-Li, Sha, 2014, Description of a new genus and species of the subfamily Arcoscalpellinae Zevina, 1978 (Cirripedia: Thoracica: Scalpellidae) from deep waters of the South China Sea, Journal of Natural History 48 (17), pp. 1055-1060 : 1056-1057

Subfamily ARCOSCALPELLINAE Zevina, 1978 Sinoscalpellum gen. nov.

Diagnosis

Capitulum with 14 calcified plates, fully covered, narrow membranous interspace between plates. Carina arched, umbo apical; upper latus rectangular, umbo at submedial of scutal margin, inframedian latus narrow and long, umbo at basi-rostral angle, protruded to below rostrum. Peduncle short, with transverse scales.

Type species

Sinoscalpellum sinensis sp. nov.

Etymology

Sino - from Latin for China, in combination with Scalpellum .

Remarks

The subfamily Arcoscalpellinae is composed of 13 genera. The characters of the new species do not allow it to be accommodated within known genera, so we erected a new genus to accommodate it. The new genus is similar to the genus Planoscalpellum Zevina by the umbo of the upper latus at the sub-medial of scutal margin. The new genus is similar to the genus Verum Zevina by having the following characteristics: apex of carinal latus not extending beyond carinal margin and inframedian latus triangular, umbo basal. But it differs from these by the inframedian latus narrow and long, umbo at basi-rostral angle and protruded to below rostrum.

There is only one species in the genus: Sinoscalpellum sinensis sp. nov.

Key to genera of the subfamily

1. Peduncle long and slender, about twice length of capitulum ....................... ........................................................... Vertebroscalpellum Newman & Ross Peduncle shorter than length of capitulum ............................................... 2

2. Inframedian latus narrow and long, umbo at basi-rostral angle, protruded to below rostrum ................................................... Sinoscalpellum gen. nov. Umbo of inframedian latus not at basi-rostral angle and not protruded to below rostrum ........................................................................................... 3

3. Umbo of upper latus at sub-medial of carinal margin of scutum ............... ................................................................................ Planoscalpellum Zevina Umbo of upper latus at apical or sub-apical ............................................ 4

4. Inframedian latus broad, with four to six sides ........................................ 5 Inframedian latus triangular or baciliform ............................................... 6

5. Carinal latus horny projected ........................................ Tarasovium Zevina Carinal latus not horny projected .................................. Welmerium Zevina

6. Umbo of inframedian latus basal or sub-basal ......................................... 7 Umbo of inframedian latus sub-medial or apical and sub-apical ............. 8

7. Umbo of carinal latus beyond carinal margin ..... Pilsbryiscalpellum Zevina Umbo of carinal latus not beyond carinal margin ................. Verum Zevina

8. Umbo of inframedian latus sub-medial ......................... Catherinum Zevina Umbo of inframedian latus apical or sub-apical ...................................... 9

9. Umbo of carinal latus protruded at carinal margin ................................ 10 Umbo of carinal latus not protruded at carinal margin ......................... 11

10. Carinal latus horny, umbo basi-carinal end ........... Diceroscalpellum Zevina Carinal latus not horny, umbo at median part of carinal margin ............... .............................................................................. Anguloscalpellum Zevina

11. Apex of inframedian latus not reach the margin of upper latus .................. ............................................................................. Amigdoscalpellum Zevina Apex of inframedian latus reach the upper latus .................................... 12

12. Umbo of carinal latus apex .............................. Trianguloscalpellum Zevina Umbo of carinal latus not at apex. ......................................................... 13

13. Umbo of carinal latus at middle of the carinal margin .... Arcoscalpellum Hoek Umbo of carinal latus at basi-carinal angle ............. Teloscalpellum Zevina