Marmacuma samimei gen. et sp. nov., (Peracarida; Cumacea; Nannastacidae) from Tarantian (Upper Pleistocene) sediments from the Sea of Marmara, Turkey
Author
Artüz, M. Levent
Author
Sakinç, Mehmet
text
Zootaxa
2020
2020-01-03
4718
1
134
144
journal article
24444
10.11646/zootaxa.4718.1.11
91e73266-88bc-459f-a807-77033bed6596
1175-5326
3602189
0F32B144-CABB-4FED-B528-5F2F7954AAC6
Marmacuma samimei
Artüz & Sakınç
,
sp. nov.
LSID.
urn:lsid:zoobank.org:pub:
D6A3604A-89BC-4277-8EB8-43407CF98CA6
(
Figures 2–3
)
Material examined.
Holotype
: LA60-001.00 (
Figure 2 A, B
);
20 Paratypes
: AK14-009.00; DG20-005.00; AK21- 006.00; AK26-006.00; AK26-006.01(
Figure 2 D
); AK26-006.02; AK29-003.00 (
Figure 2 E, F
); LA60-001.01; LA60-001.02; LA14-002.00; LA14-002.01; LA14-002.02; LA16-003.00 (
Figure 2 C
); LA18-004.00; LA18-004.01; LA18-004.02; LA20-004.00; LA20-004.01; LA20-004.02; LA44-001.00. All same data as holotype.
Diagnosis
. Carapace 1.3 times as long as high, 1.3 times as long as wide; ocular lobe present; mid-dorsal carina absent; dorsally 5–7 pairs of spines directed anteriorly; posterior single pair of posteriorly directed spines; both anterolateral, lateral and posterolateral margins serrated; pseudorostrum prominent.
Description.
Holotype
LA60-001.00: Carapace (TL 949.2 μm; CL716.4; CW 552.1 μm and
CH
554 μm) (
Figure 2
) 1.3 times as long as high, 1.3 times as long as wide; ocular lobe present; mid-dorsal carina absent, domelike dorsally, more elevated in the middle, posterior part slightly excavated, anterior flattened; regular and sparsely scattered, densely covered with small acute tubercles and small pits, and numerous spines with a large anteriorly directed postocular spine on pseudorostral lobe; dorsally 5–7 pairs of spines directed anteriorly; posterior single pair of posteriorly directed spines; both anterolateral, lateral and posterolateral margins serrated, anterolateral margin with 28–32 notches on each side; serration on anterolateral margin directed forward; pseudorostrum one-third the carapace length, base width 1.4 times and tip width 5.4 times in length, prominent, obliquely directed, carinate, tip with couple of spines; single pair of forward directed medium sized spins laterally located, one-third of the base of pseudorostrum. Thorax, pleon, and appendages are unknown. Measurements of the carapace are given in
Table 2
and the ornamentation of the carapace is shown in
Figure 3
.
FIGURE 3A.
The cephalothorax of
Marmacuma samimei
gen. et sp. nov.
, showing the position and orientation of measurements given in Table 2. dorsal view
FIGURE 3B.
The cephalothorax of
Marmacuma samimei
gen. et sp. nov.
, showing the position and orientation of measurements given in Table 2. lateral view.
TABLE 2
Measurements (μm) taken on holotype and selected paratypes of
Marmacuma samimei
gen. et sp. nov.
(L
1
) total length including pseudorostrum: (L
2
) length of pseudorostrum; (L
3
) Carapace length excluding pseudorostrum; (W
1
) Carapace width; (W
2
) Width of carapace on fronto-orbital; (W
3
) Pseudorostral base width; (W
4
) Pseudorostral apex width; (W
5
) Carapace height. Positions and orientation of measurements are illustrated in Figure 3. * Holotype of
Marmacuma samimei
gen. et sp. nov.
| Specimen |
Measurements |
| LA60-001.00* |
L1 949.2 |
L2 232.8 |
L3 716.4 |
W1 552.1 |
W2 412.2 |
W3 166.2 |
W4 43.2 |
W5 554.0 |
| LA16-003.00 |
938.1 |
230.1 |
708.0 |
545.6 |
407.3 |
164.2 |
42.7 |
547.5 |
| AK29-003.00 |
951.3 |
233.3 |
718.0 |
553.3 |
413.1 |
166.5 |
43.3 |
555.2 |
| AK21-006.00 |
- |
231.4 |
712.1 |
- |
- |
- |
- |
552.4 |
| LA14-002.01 |
948.3 |
232.6 |
715.7 |
551.6 |
411.9 |
166.0 |
43.2 |
553.5 |
| LA44-001.00 |
948.1 |
232.5 |
715.6 |
551.5 |
411.7 |
166.1 |
43.1 |
553.3 |
Remarks.
No other body fragments and/or other species belonging to this order were found in any of the sediment core samples studied within the MAREM project (N= 51) throughout the Sea of Marmara. In addition, no extant specimen was found during the numerous biodiversity samples from the same localities performed between
2008 and 2018
.
Gender.
Unknown.
Etymology.
The trivial name honours Prof. Dr. F. Samime Artüz, geologist and preeminent sediment specialist and primary author of studies on petrography and palynology around
Turkey
. The specific name is a noun in the genitive singular.
Localities.
Sea of Marmara, (
34° 00.000’ N–
029° 55.050’ E
/
41° 20.000’ N–
025° 00.000’ E
) with an approximately depth of
800–1200 m
at the Upper Pleistocene.