Gibbosaverruca Young, 2002

Gan, Zhibin, Zhang, Dongsheng, Li, Xinzheng & Wang, Chunsheng, 2021, Gibbosaverruca weijiai, a new verrucid (Crustacea, Thoracica) species from the Weijia Guyot deep-sea seamount in the West Pacific, European Journal of Taxonomy 739 (1), pp. 158-167 : 164-165

Key to the extant species of the genus Gibbosaverruca Young, 2002 .

1. Movable scutum not flat, with distinct articular ridges .................................................................... 2

– Movable scutum flat, apico-basal line defined by growth-line deflection .......................................... ........................................................................................................... G. laeviscuta Buckeridge, 1994

2. Movable scutum with three or more articular ridges ........................................................................ 3

– Movable scutum with two articular ridges ....................................................................................... 7

3. Movable scutum with three articular ridges ..................................................................................... 4

– Movable scutum with four articular ridges ................................................ G. navicula (Hoek, 1913)

4. Movable tergum with three articular ridges ...................................................................................... 5

– Movable tergum with four articular ridges ................................................... G. robusta Young, 2002

5. Intermediate ridge of movable tergum about three times width of axial ridge, caudal appendage extremely long, more than five times length of protopodite .................................. G. weijiai sp. nov.

– Intermediate ridge of movable tergum about same width of axial ridge, caudal appendage short .. 6

6. Radius-like process of fixed scutum well-developed, apices of rostrum and carina strongly projecting ..................................................................................................... G. sulcata ( Hoek, 1883)

– Radius-like process of fixed scutum small, apices of rostrum and carina slightly or not projecting. ...................................................................................................................... G. gibbosa ( Hoek, 1883)

7. Movable tergum with three articular ridges, caudal appendage short, no more than two times as long as protopodite .................................................................................................................................... 8

– Movable tergum with two articular ridges, caudal appendage long, more than two times as long as protopodite ...................................................................................................... G. nitida ( Hoek, 1883)

8. Rostrum with flat surface from upper margin to basal margin of scutum ........................................ 9

– Rostrum without flat surface from upper margin to basal margin of scutum ................................. 10

9. Rostrum upper surface with one small ridge turned toward scutum ............. G. mateoi Young, 2002

– Rostrum upper surface without ridge ....................................................... G. darwini (Pilsbry, 1907)

10. Rostrum and carina each with no more than four articular ridges ...................................................11

– Rostrum and carina each with five articular ridges .................................. G. montereyi Young, 2002

11. Uppermost ridge of carina terminating at end of axial ridge of movable tergum .......................... 12

– Uppermost ridge of carina exceeding end of axial ridge of movable tergum ..................................... .............................................................................................................. G. costata (Aurivillius, 1898)

12. Intermediate ridge of movable scutum about same width as axial ridge ........................................ 13

– Intermediate ridge of movable scutum about two times wider than axial ridge ................................. ............................................................................................... G. somaliensis (Nilsson-Cantell, 1929)

13. Rostrum with two articular ridges of same width ........................................... G. mitra (Hoek, 1907) – Rostrum with three articular ridges, second largest .......................... G. rathbuniana ( Pilsbry, 1916)