| (a) |
| | Species | apex | arcuatilis | arx | chessi | cohenae | compressa | darbyi |
| | Shell length, mm | 1.18 | 1.02 | 1.43 | 1.21 | 1.24 | 1.6 | 1.28 | | Surface with ribs (r) or smooth (s) | r | r | s | r | r | r | r | | Incisur shallow or deep |
*Deep |
*Deep |
*Shallow |
*Deep |
*Deep |
*Shallow |
*Deep | | No. of medial br. on rostrum (infold) | 10 | 10 | 7–8 | 10 | 7–8 | ? | 7 | | 1st antenna | | | | | | | | | no. of br. 2nd seg., d-la | 1–1 | 1–1 | 1–1 | 1–1 | 1–1 | 1–0 | 1–1 | | no. of br. 3rd seg., d.-v | 2–1 | 2–1 | 2–1 | 2–1 | 2–1 | ? | 2–1 | | no. of br. 4th seg., d.-v | 1–2 | 1–2 | 1–2 | 1–2 | 1–2 | 1–2 | 1–2 | | no. of fil. on sens. br. | 1 | 1 | 2 | 3 | 5 | ? | 2 | | no. of fil. on b.-br | 0 | 0 | 0 | 0 | 0 | ? | 0 | | no. of fil. on c.-br. | 0 | 2 | 1 | 1 | 2 | ? | 2 | | no. of fil. on g.-br. | 1 | 2 | 2 | 1 | 3 | ? | 1 | | 2nd antenna | | | | | | | | | endop. no. of br. | 4 | 4 | 5 | 4 | 5 | 4 | 4 | | Mandible | | | | | | | | | coxale + or − bifurcate endite | + | + | + | + | + | + | + | | basale, no. of d. br. mid.-dist. | 3 | 3 | 3 | 3 | 3 | ? | 3 | | basale, no. of thin v. br. | 2 | 4 | 3 |
*3 | 5 | ? |
*5 | | basale, no. of stout v. br. | 4 | 3 | 4 |
*3 | 2 | ? |
*2 | | basale, total no. of v. br. | 6 | 7 | 7 | 6 | 7 | ? | 7 | | 1st end. seg., no. v. br. | 2 | 2 | 2 | 2 | 2 | ? | 2 | | 2nd end. seg., no. of d. br. | 3 | 3 | 4 | 3 | 4 | ? | 3 | | 2nd end. seg., no. of v. br. excl cl.. | 5 | 1 or 2 | 5 | 2 or 3 | 2 | ? | 3 | | 3rd end. seg., no. of br. excl. cl. | 4 | 6 | 3 | 6 | 6 | ? | 6 | | Maxilla, no. br. on the 3 endites | 2–3–4 | ? | (2–4)–(2–4)–(3–5) | (2-3)–(2-3)–(2-3) | 6–4–8 | ? | 6–5—6 | | Fifth limb | | | | | | | | | no. br. on the 3 endites | 2–6–(6-7) | 15 | 3–5–7 | 3–5–7 | 5–6–10 | ? | (3-4)–5–(5-6) | | ex. seg., no. primary teeth | 4 | 4 |
*4 |
*4 |
*4 | 4 | 4 | | 2nd ex. seg., no. teeth | 3 | 2 |
*3 |
*3 |
*3 | 3 |
*3 | | 2nd ex. seg., + or − bi-or trifurcate teeth | + | + | + | + | + | ? | + | | 3rd ex. seg., no. br. on each lobe | 2–2 | 3–2 | 3–2 | 3–2 | 2–2 | ? | 2—3 | | 4th + 5th segs. no. br. | 5 | 5 | 4 | 4 | 4 | 4 | 4 | | Sixth limb | | | | | | | | | no. epipodial br. | 2 | 2 | 2 | 1 or 2 | 2 | 2 | 2 | | no. br. on the 4 endites | 3–2–2–2 | 3–3–2–3 | (2-3)–2–3–(3-4) | 3–2–2–2 | 3–3–(2–4)–3 | 2–2–3–2 | 3–2–2–3 | | end-seg., no. br. | 7 | 7 | 6 | 7 | 7 | 7 | 7 | | 7th limb | | | | | | | | | no. terminal cleaning br. | 3–3 | 3–3 | 3–3 | 3–3 | 3–3 | 3–3 | 3–3 | | no. prox. cleaning br. | 2–2 | 2–2 | 2–2 | 2–2 | 2–2 | 2–2 | 2–2 | | no. comb-teeth | 6–6 | 5–4 | 4–(5-6) | 5–3 | 3–5 | 1–5 | 10–4 | | Furca, no. of main claws | 4 | 4 | 3 | 4 | 4 | 3 | 4 | | Furca, no. of secondary claws | 2 | 2 | 3 | 2 | 2 | 3 | 2 | | Lateral Eyes, + or − | + | + | + | + | + | + | + | | Specimen Number, # = USNM | #158262 | #158212 | #193411 | #158280 | #158414 | * | #158628A |
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| (b) |
| | Species | dinochelata | dux | exrex | ferax | gerdhartmanni | gyre | hartmannii |
| | Shell length, mm | 1.18 | 0.99 | 0.99 | 1.16 | 1.36 | 1.1 | 1.12 | | Surface with ribs (r) or smooth (s) | r | r | r | r | r | r | r | | Incisur shallow or deep |
*Shallow |
*Deep |
*Shallow |
*Deep |
*Deep |
*Deep |
*Deep | | No. of medial br. on rostrum (infold) | 8 | 6–7 | 5–6? | 8? | 13 | 7–9 | 7–8 | | 1st antenna | | | | | | | | | no. of br. 2nd seg., d-la | 1–1 | 1–1 | 1–1 | 1–1 | 1–1 | 1–1 | 1–1 | | no. of br. 3rd seg., d.-v | 2–1 | 2–1 | 2–1 | 2–1 | 2–1 | 2–1 | 2–1 | | no. of br. 4th seg., d.-v | 1–2 | 1–2 | 1–2 | 1–2 | 1–2 | 1–2 | 1–2 | | no. of fil. on sens. br. | 0 | 1 | 2 | 3 | 2 | 1 | 1 | | no. of fil. on b.-br | 0 | 0 | 0 | 0 | 0 | 0 | 0 | | no. of fil. on c.-br. | 0 | 0 | 1 | 1 | 0 | 1 | 0 | | no. of fil. on g.-br. | 1 | 1 | 2 | 2 | 1 | 1 | 1 | | 2nd antenna | | | | | | | | | endop. no. of br. | 4 | 3–4 | 1 or 4 | 5 | 4 | 4 | 4 | | Mandible | | | | | | | | | coxale + or − bifurcate endite | + | + | + | + | + | + | + | | basale, no. of d. br. mid.-dist. | ? | 3 | 3 | 3 | 3 | 4 | 3 | | basale, no. of thin v. br. | ? | 5 |
*5 |
*3 | 4? |
*2 | 4 | | basale, no. of stout v. br. | ? | 3 |
*2 |
*4 | 2? |
*4 | 2 | | basale, total no. of v. br. | ? | 8 | 7 | 7 | 6 | 6 | 6 | | 1st end. seg., no. v. br. | ? | 2 | 2 | 2 | 2 | 2 | 2 | | 2nd end. seg., no. of d. br. | ? | 3 | 4 | 3–4 | 3 | 3 | 3 | | 2nd end. seg., no. of v. br. excl. cl. | ? | 4 | 4 | 4 | 4 | 2 | 3 | | 3rd end. seg., no. of br. excl. cl. | ? | 4 | 3 | 3 | 3 | 6 | 4 | | Maxilla, no. br. on the 3 endites | 9 | 3–3–4 | ? | ? | 6–5–6 | 3–3–3 | 2–3–3 | | Fifth limb | | | | | | | | | no. br. on the 3 endites | ? | 3–3–5 | 3–4–6 | ? | 4–4–7 | (2-3)–5–8 | 3–7–4 | | ex. seg., no. primary teeth | ? | 4 | 4 |
*4 | 4 | 4 | 4 | | 1st ex. seg., no. teeth | ? | 3 | 3 |
*3 | 3 | 3 | 3 | | 2nd ex. seg., + or − bi-or trifurcate teeth | ? | + | + | + | + | + | + | | 3rd ex. seg., no. br. on each lobe | 2–2 | 3–2 | 3–2 | 3–2 | 3–2 | 2–3 | 2–2 | | 4th + 5th segs. no. br. | 4 | 5 | 4 | 4 | 3–4 | 4–5 | 4 | | Sixth limb | | | | | | | | | no. epipodial br. | ? | 2 | 2 | 2 | 2 | 1–2 | 2 | | no. br. on the 4 endites | ? | 3–2–2–(2-3) | 3–2–2–2 | 3–2–3–2 | (2-3)–2–3–3 | 3–2–2–(2-3) | 2–2–3–2 | | end-seg., no. br. | ? | 7–8 | 6 | 6 | 7 | 7–8 | 7 | | 7th limb | | | | | | | | | no. terminal cleaning br. | 3–3 | 3–3 | 3–3 | 3–3 | 3–3 | 3–3 | 3–3 | | no. prox. cleaning br. | 2–2 | 2–(1-2) | (1-2)–(1-2) | 2–2 | 2–2 | 2–2 | 2–2 | | no. comb-teeth | 1–2 | (2-3)–(2-3) | (3-4)–(3-4) | 3–4 | 5–2 |
*?4–2 | 1–5 | | Furca, no. of main claws | 4 | 4 |
*4? | 3 | 3 | 4 | 4 | | Furca, no. of secondary claws | 2 | 2 |
*3? | 3 | 3 | 2 | 2 | | Lateral Eyes, + or − | ? | + | + | + | + | + | + | | Specimen Number, # = USNM | #122907 | #194087 | #194254 | (1) | ZMH 27297 | #154185 | #158219 |
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| (c) |
| | Species | irrostrata | judayi | kalkei | leloeuffi | licina | lomae | mollita |
| | Shell length, mm | 1.5 | 1.01 | 1.08 | 1.99 | 1.02 | 1.46 | 1.46 | | Surface with ribs (r) or smooth (s) | r | r | r | r | r | r | r | | Incisur shallow or deep | Deep |
*Deep |
*Deep |
*Deep |
*Deep |
*Deep |
*Shallow | | No. of medial br. on rostrum (infold) | ? | 7 | 7–8 | 4 | 6–7 | 10–12 | 8–12 | | 1st antenna | | | | | | | | | no. of br. 2nd seg., d-la | 1–1 | 1–1 | 1–1 | 1–1 | 1–1 | 1–1 | 1–1 | | no. of br. 3rd seg., d.-v | 1–1 | 2–1 | 2–1 | 1–1 | 2–1 | 2–1 | 2–1 | | no. of br. 4th seg., d.-v | 1–2 | 1–2 | 1–2 | 1–2 | 1–2 | 1–2 | 1–2 | | no. of fil. on sens. br. | 0 | 1 | 1 | 0 | 0 | 3 | 3–4 | | no. of fil. on b.-br | 0 | 0 | 0 | 0 | 0 | 0 | 0 | | no. of fil. on c.-br. | 0 | 0 | 1 | 0 | 1 | 0–1 | 0–1 | | no. of fil. on g.-br. | 0 | 1 | 1 | 0 | 1 | 0 | 2–3 | | 2nd antenna | | | | | | | | | endop. no. of br. | 4 | 4 | 4 | 4 | 4 | 5 | 4 | | Mandible | | | | | | | | | coxale + or − bifurcate endite | 2 | (2–5) | (2–5) | (2–4) | (2–5) | (2–5) | (2–5) | | basale, no. of d. br. mid.-dist. | + | + | + | + | + | + | + | | basale, no. of thin v. br. | 3 | 3 | 3 | 2 | 3 | 3 | 3 | | basale, no. of stout v. br. | 4 |
*2 | 3 | 2 | 2 |
*2 |
*3 | | basale, total no. of v. br. | 6 | 6 | 4 | 6 | 2 | 5 | 7 | | 1st end. seg., no. of v. br. | 3 | 2 | 2 | 3 | 2 | 2 | 2 | | 2nd end. seg., no. of d. br. | 2 | 3 | 3 | 3 | 3 | 3 | 4 | | 2nd end. seg., no. of v. br. excl. cl. | 1 | 2 | 2 | 1 | 3 | 2 | 3 | | 3rd end. seg., no. of br. excl. cl. | 5 | 6? | 6 | 5 | 6 | 6 | 6 | | Maxilla, no. of br. on the 3 endites | (5-6)–(5-6)–7 | ? | (2-3)–(2-3)–(2-3) | (4–7)–4–5 | 6–5–8 | 5–4–(6-7) | 5–5–5 | | 5th limb | | | | | | | | | no. of br. on the 3 endites | 2–3–4 | ? | 3–6–6 | 2–3–4 | 3–5–6 | 2–6–6 | 3–5–8 | | ex. seg., no. of primary teeth |
*2 | 4 |
*4 | 4 |
*4 | 4 | 4 | | 2nd ex. seg., no. of teeth |
*3 | 3 |
*3 | 3 |
*3 | 3 | 3 | | 2nd ex. seg., + or − bi-or trifurcate teeth | + | + | + | + | + | + | + | | 3rd ex. seg., no. of br. on each lobe | 2–2 | 3–2 | 2–3 | 3–2 | 3–(1 or 2) | 3–2 | 3–2 | | 4th + 5th segs. no. of br. | 4 | 4 | 3–4 | 4 | 4 | 5 | 4 | | 6th limb | | | | | | | | | no. of epipodial br. | 2 | 2 | 2 | 2 | 2 | 2 | 2 | | no. of br. on the 4 endites | 1–2–2–3 | 2–2–2–2 | (2-3)–2–2–3 | 3–2–2–2 | 3–1–(2-3)–(2-3) | 2–1–2–2 | 3–2–4–3 | | end-seg., no. of br. | 7 | 7 | 7–8 | 7 | 7 | 7 | 7 | | 7th limb | | | | | | | | | no. of terminal cleaning br. | 7 | 3–3 | 2–3 or 3–3 | 2–3 | 2–3 or 3–3 | 3–3 | 3–3 | | no. of prox. cleaning br. | 3–2 | 2–2 | 1–1 | 2–2 | 2–2 | 2–2 | 2–2 | | no. of comb-teeth | 2–2 | 3–2 | ? | !8 | (2-3)–(2-3) | 5–3 | 11–7 | | Furca, no. of main claws |
*3–3 | 4 | 4 | 3 | 3 | 4 | 3 | | Furca, no. of secondary claws | 3 | 2 | 2 | 3 | 3 | 2 | 3 | | Lateral Eyes, + or − | − | + | + | ? | + | − | + | | Specimen Number, # = USNM | #152826 | #158221 | #159079 | #149330 | #152851 | #158258 | #158001 |
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| (d) |
| | Species | normani | ovata | pax | rex | rostrata | rotunda | schroederi |
| | Shell length, mm | 1.2 | 1.52 | 1 | 0.92 | 1.32 | 1.33 | 1.73 | | Surface with ribs (r) or smooth (s) | r | r | r | r | r | r | r | | Incisur shallow or deep |
*Deep |
*Deep |
*Deep |
*Shallow |
*Deep |
*Shallow |
*Deep | | No. of medial br. on rostrum (infold) | 5 | 4? | 7 | ? | 7–9 | 7 | 17 | | 1st antenna | | | | | | | | | no. of br. 2nd seg., d-la | 1–1 | 1–1 | 1–1 | 1–1 | 1–1 | 1–1 | 1–0 | | no. of br. 3rd seg., d.-v | 2–1 | 2–1 | 2–1 | 2–1 | 2–1 | 2–1 | 2–1 | | no. of br. 4th seg., d.-v | 1–2 | 1–2 | 1–2 | 1–2 | 1–2 | 1–2 | 1–2 | | no. of fil. on sens. br. | 0 | 2 | 1 | 3 | 1 | 3 | 1 | | no. of fil. on b.-br | 0 | 0 | 0 | 0 | 0 | 0 | 0 | | no. of fil. on c.-br. | 0 | 0? | 1 | 1 | 1 | 1 | 0 | | no. of fil. on g.-br. | 1 | 1 | 1 | 2 | 1 | 2 | 2 | | 2nd antenna | | | | | | | | | endop. no. of br. 1st seg | 4 | 4 | 4 | 4 | 4 | 4 | 5 | | endop. no. of br. 2nd seg | abs. | abs. | abs. | abs. | abs. | abs. | abs. | | endop. no. of br. 3rd seg | abs. | abs. | abs. | abs. | abs. | abs. | abs. | | endop. no. of br. w/o setules | (2–5) | (2–5) | (2–5) | (2–5) | (2–5) | (2–5) | (2–5) | | Mandible | | | | | | | | | coxale + or − bifurcate endite | + | + | + | + | + | + | + | | basale, no. of d. br. mid.-dist. | 3 | 3 | 3 | 3 | 3 | 3 | 3 | | basale, no. of thin v. br. | 4 |
*5 |
*5 |
*3 |
*5 |
*5 |
*5 | | basale, no. of stout v. br. | 2 |
*2 |
*2 |
*4 |
*2 |
*2 |
*3 | | basale, total no. of v. br. | 6 | 7 | 7 | 7 | 7 | 7 | 7–8 | | 1st end. seg., no. of v. br. | 2 | 2 | 2 | 2 | 2 | 2 | 3 | | 2nd end. seg., no. of d. br. | 4 | 3 | 3 | 4 | 3 | 4 | 5 | | 2nd end. seg., no. of v. br. excl. cl. | 2 | 2 | 2 | 4 | 2 | 2 | 2 or 3 (otd) | | 3rd end. seg., no. of br. excl. cl. | 6 | 3 | 6 | 3 | 6 | 6 | 4 | | Maxilla | | | | | | | | | no. of br. on the 3 endites | 6–5–5 | 6–5–7 | (4–6)–(4–6)–(4–6) | (2-3)–(2-3)–(2-3) | (4–6)–(4–6)–(4–6) | 6–4–5 |
*6–3–6 | | 5th limb | | | | | | | | | no. of br. on the 3 endites | 3–5–7 | 3–4–6 | 2–4–6 | 3–3–9 | 2–4–6 | 3–(4-5)–6 | (1–3)–5–(5-6) | | ex. seg., no. of primary teeth | 5 | 4 | 4 |
*4 | 4 | 4 | 4 | | 2nd ex. seg., no. of teeth | 3 | 3 | 3 |
*3 | 3 | 3 | 3 | | 2nd ex. seg., + or − bi-or trifurcate teeth | + | + | + | + | + | − | + | | 3rd ex. seg., no. of br. on each lobe | 3–2 | 3–2 | 1–2 | 3–2 | 2–2 | 4–2 | 3–2 | | 4th + 5th segs. no. of br. | 4 | 4 | 4 | 3–4 | 4 | 4 | 4 | | 6th limb | | | | | | | | | no. of epipodial br. | 2 | 2 | 2 | 2 | 1 | 2 | 2 | | no. of br. on the 4 endites | 3–2–2–3 | 3–1–(2-3)–3 | 3–1–2–2 | 3–2–2–2 | 3–1–2–3 | 3–4–3–3 | 3–3–3–3 | | end-seg., no. of br. | 7 | 7 | 7 | 6 | 7 | 6 | 6 | | 7th limb | | | | | | | | | no. of terminal cleaning br. | 3–3 | 3–3 | 2–3 or 3–3 | (2-3)–(2-3) | 3–3 | 3–3 | 3–3 | | no. of prox. cleaning br. | ? | 2–2 | 1–2 or 2–2 | (1-2)–(1-2) | 2–2 | 3–3 | 2–2 | | no. of comb-teeth | 2–5 | 13–9 | 11–6 | 6–4 | 11–6 | 8–8 | 5–2 | | Furca, no. of main claws | 3 | 3 | 4 | 3 | 4 | 3 | 4 | | Furca, no. of secondary claws | 3 | 3 | 2 | 3 | 2 | 3 | 2 | | Lateral Eyes, + or − | + | + | − | + | − | + | + | | Specimen Number, # = USNM | #193675 | #137686 | ZMH 27314-3 | #193415 | #158222 | #158214 | #194472 |
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| (e) |
| | Species | sterreri | tryx | vox |
| | Shell length, mm | 1.1 | 1.1 | 0.91 | | Surface with ribs (r) or smooth (s) | r | r | r | | Incisur shallow or deep |
*Deep |
*Shallow |
*Shallow | | No. of medial br. on rostrum (infold) | 6–8 | 6 | 8 | | 1st antenna | | | | | no. of br. 2nd seg., d-la | 1–1 | 1–0 | 1–1 | | no. of br. 3rd seg., d.-v | (1-2)–1 | 2–1 | 2–1 | | no. of br. 4th seg., d.-v | 1–2 | 1–2 | 1–2 | | no. of fil. on sens. br. | 1 | 2 | 2 | | no. of fil. on b.-br | 0 | 0 | 0 | | no. of fil. on c.-br. | 1 | 2 | 1 | | no. of fil. on g.-br. | 1 | 2 | 1 | | 2nd antenna | | | | | endop. no. of br. | 4 | 5 | 3–4 | | Mandible | | | | | coxale + or − bifurcate endite | + | + | + | | basale, no. of d. br. mid.-dist. | 3 | 3 | 3 | | basale, no. of thin v. br. |
*5 | 3 | 4 | | basale, no. of stout v. br. |
*2 | 2 | 3 | | basale, total no. of v. br. | 7 | 5 | 7 | | 1st end. seg., no. of v. br. | 2 | 2 | 2 | | 2nd end. seg., no. of d. br. | 3 | 3 | 3 | | 2nd end. seg., no. of v. br. excl. cl. | 2 | 4 | 4 | | 3rd end. seg., no. of br. excl. cl. | 6 | 4 | 3 | | Maxilla, no. of br. on the 3 endites | 5–5–6 | 3–2–3 | 2–4–3 | | 5th limb | | | | | no. of br. on the 3 endites | 3–5–6 | 4–4–6 | 3–(4–6)–4 | | ex. seg., no. of primary teeth | 4 | 4 | 4 | | 2nd ex. seg., no. of teeth | 3 | 3 | 3 | | 2nd ex. seg., + or − bi-or trifurcate teeth | + | + | + | | 3rd ex. seg., no. of br. on each lobe | 3–2 | 3–2 | 3–2 | | 4th + 5th segs. no. of br. | 4 | 4 | 4 | | 6th limb | | | | | no. of epipodial br. | 2 | 2 | 1 | | no. of br. on the 4 endites | (2-3)–2-3–3 | 3–2–3–3 | 3–2–2–2 | | end-seg., no. of br. | 7 | 6 | 7 | | 7th limb | 3–3 | 3–3 | 3–3 | | no. of terminal cleaning br. | 2–2 | 2–2 | 2–2 | | no. of prox. cleaning br. | 5–3 | 5–3 | ? | | no. of comb-teeth | | | | | Furca, no. of main claws | 4 | 3 | 4 | | Furca, no. of secondary claws | 2 | 3 | 2 | | Lateral Eyes, + or − | + | + | − | | Specimen Number, # = USNM | #158115 | #194147 | #158309 | | (1) after Poulsen, [10] | | | |
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abs.: absent; br.: bristles; cl.: claw; d: dorsal; dist.: distal; endop.: endopodite; ex.: exopod; fil.: filaments; no.: number; prox.: proximal; seg.: segment; sens: sensory; v: ventral.; ?: unknown; *: after Poulsen [10]. (Only males have been described for the species fusca, mortenseni, sagax, and tridens; see Table 4).
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