Leucon ( Crymoleucon ) cf. lufupa Mühlenhardt-Siegel, 2010

Mühlenhardt-Siegel, Ute, 2025, The cumacean family Leuconidae in the south-west Atlantic deep-sea basins obtained during the cruise DIVA 3 with RV Meteor (cruise No. M 79 / 1), Zootaxa 5716 (2), pp. 151-206 : 182

publication ID	https://doi.org/10.11646/zootaxa.5716.2.1
publication LSID	lsid:zoobank.org:pub:17F5F026-7451-46B5-8838-C1D5561C04FA
DOI	https://doi.org/10.5281/zenodo.17889186
persistent identifier	https://treatment.plazi.org/id/9F2B0602-AF13-FFE8-72DA-B17C2EC09475
treatment provided by	Plazi
scientific name	Leucon ( Crymoleucon ) cf. lufupa Mühlenhardt-Siegel, 2010
status

Treatment

Leucon ( Crymoleucon) cf. lufupa Mühlenhardt-Siegel, 2010 View in CoL

( Figure 20–22 View FIGURE 20 View FIGURE 21 View FIGURE 22 )

Paratypes:

Argentine Basin:

# 532—EBS: 1 non-ovigerous female (broken after pereionite 4) ( ZMH K 64989 View Materials ) .

# 533—EBS: 1 manca, 2 non-ovigerous females (1 figured, 1 was dried), 5 subadult male (2 pairs of pleopods developing) ( ZMH K 64990 View Materials ) .

# 534—EBS: (sample dried) 5 non-ovigerous females, 2 females, badly damaged ( ZMH K 64991 View Materials ) .

Brazil Basin:

# 558—EBS: 1 manca, 1 ovigerous female ( ZMH K 64992 View Materials ) .

#561—EBS: 1 ovigerous female (slightly damaged, dissected), 1 young male (pleopods not yet? developed), 1 male with (A2 reaching beyond carapace, with brush of setae at basis, but no pleopods), 1 non-ovigerous female; 1 ovigerous female badly damaged (frontal part separated) (ZMH K 64993 View Materials ).

Diagnosis. Dorsomedian line anteriorly with 6–7 teeth, posteriorly serrate in double row, occasionally 1 tooth antero-laterally on frontal lobe, frontal lobe anteriorly more elevated, length proportion pseudorostrum to rest of carapace is 0.46.

Distribution: Southern Atlantic, 4602 to 5142 m depth.

Remarks: The habitus and extremities of the female ( Figures 20–22 View FIGURE 20 View FIGURE 21 View FIGURE 22 ) resemble very much Leucon ( C.) lufupa , which was described for the Angola Basin and the Cape Basin ( Mühlenhardt-Siegel, 2010). The setation in the new material looks a little bit poor, mainly due to damaged condition of the material, so e.g. in some of the specimens it is hard to see if the double row of dorsomedian teeth in the posterior part of the carapace is present or not. Furthermore, the exopod of the pereiopod has 4 teeth in L. lufupa and none in the DIVA 3 material. On the other hand, there are 5 teeth above the antennal notch in the DIVA 3 specimens but only 4 in L. lufupa .

The specimens from the DIVA 3 expedition resemble in the other characters L. lufupa , especially the length and form of the pseudorostrum is very similar in the specimens from both parts of the southern Atlantic. As the differences in the number of teeth as mentioned above are the only character between the present specimens and those from the Angola and Cape Basins, the DIVA 3 specimens have to remain as L. cf. lufupa .