Hartmanipsammolyce Pettibone, 1997

Cruz-Gómez, Christopher, 2022, Pelogeniinae Chamberlin, 1919 (Annelida, Sigalionidae) from the Grand Caribbean Region, European Journal of Taxonomy 807, pp. 1-59 : 13-14

Genus Hartmanipsammolyce Pettibone, 1997

Hartmanipsammolyce Pettibone, 1997: 23 .

Type species

Psammolyce pendula Hartman, 1942 by original designation.

Diagnosis

Pelogeniinae with prostomium oval, wider than long. Upper lip without facial tubercle. Median antennal ceratophore bulbous, base with ctenidia. Segment II with middorsal subtriangular lobe; neuropodia without appendages; neurochaetal blades bifid. Segment III without dorsal cirri; neuropodia with large, expanded balloon-like lobes on distal margin; neuropodial blades falcate, bifid or entire. First pair of elytra short or elongated.

Remarks

Pettibone (1997) proposed Hartmanipsammolyce with H. pendula as type species, and Psammolyce globula Hartman, 1965 as its junior synonym. Hartman (1942b: 91) described P. pendula from sediments at a depth of 352 m off Cuba using an anterior fragment with 85 segments and highlighting the “… large, pendulous organ on the third parapodium…”.Later, she ( Hartman1965: 53)described P.globula from off Bermuda based on an anterior fragment with 54 segments, from sediments at a water depth of 1700 m, and emphasized that the main difference between these two species was the presence of the “… globular process…” on the second parapodium, instead of being present on the third, as in P. pendula . Pettibone (1997: 23) revised the type material of both species and did not find any morphological

differences to keep them as two separated species. However, there are some slight differences between these two species, and the key below includes them as distinct, pending a comparative study to clarify their differences.

Key to species of Hartmanipsammolyce Pettibone, 1997

1. Segment III neuropodia with sessile lobes, not pedunculate, ventral cirri surpassing lobe .............. 2

– Segment III neuropodia with pedunculated lobes, stalk as long as distal expanded portion, ventral cirri not reaching tip of lobe ........ H. globula ( Hartman, 1965) , off Bermuda, Northwestern Atlantic

2. Median segments with neurochaetal blades of units A–D with short distal and subdistal teeth; posterior elytra without medial processes, longer papillae entire........................................................ ............................................................................ H. pendula (Hartman, 1942) , Cuba, Caribbean Sea

– Median segments with neurochaetal blades of units A–D with long distal and subdistal teeth; posterior elytra with 6–7 medial processes, longer papillae articulated.............................................. ................................................................................. H. pettiboneae sp. nov., Mexico, Caribbean Sea

Remarks

The junior synonym of H. pendula , Psammolyce globula Hartman, 1965 , is clearly congeneric but both the original descriptions and illustrations point out differences to be considered. For example, H. pendula has a drop-like neuropodial lobe on segment III that is inserted at the neuroacicular level without a stalk ( Hartman 1942b: 106, pl. 9 fig. 20; Pettibone 1997: 24, fig. 15e), whereas in P. globula this neuropodial lobe is balloon-like, inserted at the supracicular level with a long stalk ( Hartman 1965: 265, pl. 3 fig. a). The type material of both species should be revised in order to clarify the morphology of both species.