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Polychaeta name details

Enigma terwielii Betrem, 1925

336127  (urn:lsid:marinespecies.org:taxname:336127)

nomen dubium (indeterminable, type lost)
Species
Enigma terwillei [auct misspelling for 'terwielii'] (subsequent misspelling by Fauchald)
marine, brackish, fresh, terrestrial
recent only
Betrem, J. G. (1925). Een nieuwe aan de Anneliden verwante diervorm, het nieuwe genus Enigma. <em>Tijdschrift der Nederlandsche Dierkundige Vereeniging, Leiden.</em> Ser. 2, 19(3-4): xcix [text derived from Betrem in meeting report notes: Meeting report in Utrecht in the Institute for Zootechnick Veterinary High School.].
page(s): xcix; note: as reported in a meeting report [details]  OpenAccess publication 
Note Bay of Guayaquil, Ecuador, Western S America,...  
From editor or global species database
Type locality Bay of Guayaquil, Ecuador, Western S America, East Pacific Ocean, possibly an alternate name of the Gulf of Guayaquil, 3.0 degrees S, 80.5 degrees W. Hartman (1967: 127) obtained this information in a personal communication with Betrem, then at Cornell University. [details]
Description Translation of original genus description (presented in Hartman, 1967: 127): "The surface epithelium has papillae and the...  
Description Translation of original genus description (presented in Hartman, 1967: 127): "The surface epithelium has papillae and the body is embedded in a hyaline mass. Parapodia and setae are absent. The prostomium has branchial filaments and a pair of palpi, both retractile into the anterior end. The nervous system has a single median, ganglionated cord. The intestine is red in life and coiled. There are 2 pairs of excretory organs, one in the anterior, the other in the posterior part of the body; they lack ciliated funnels. The dorsal blood vessel is accompanied by a cardiac body over the oesophagus. A single septum is present. The unpaired gonad lies close to the intestinal coil.” Hartman suggested the species was close to Poeobius meseres. [details]

Etymology Terwiel is evidently honouring a family name for a male (hence 'terwielii'). There appears to be few references to a...  
Etymology Terwiel is evidently honouring a family name for a male (hence 'terwielii'). There appears to be few references to a Terwiel in marine biology literature, although the name is known in other fields of endeavour. However, a G. J. Terwiel collected crustacea for the Museum of Amsterdam in 1925, which is a matching time period. [details]

Status Hartman suggested the species represented by the specimen was close to the species with the junior name of Poeobius...  
Status Hartman suggested the species represented by the specimen was close to the species with the junior name of Poeobius meseres. Fauchald (1977) treated the placement of Enigma as incertae sedis within Poeobiidae. He used an incorrect spelling of 'terwillei' for the species. Betrem's name Enigma terwielii was 'published' in a meeting report. A later publication was intended but is not known. The specimens were not kept and the only information on the taxon is in the brief text of the meeting report. The identity of this taxon is unknowable with certainty, therefore, taking into account the unintended publication of the name, Enigma terwielii is here treated as a nomen dubium. Seid, Lindsay & Rouse (2020) state that: "Although we regard E. terwielii as indeterminable given the problems with the description and the absence of type material or figures, we suggest that its sole record was plausibly a southern occurrence of P. meseres."
 [details]
Read, G.; Fauchald, K. (Ed.) (2021). World Polychaeta Database. Enigma terwielii Betrem, 1925. Accessed at: http://www.marinespecies.org/polychaeta/aphia.php?p=taxdetails&id=336127 on 2021-09-24
Date
action
by
2008-03-18 12:55:09Z
created
2008-03-26 11:36:43Z
changed
2017-10-31 04:33:48Z
changed
2017-11-01 20:50:57Z
changed

original description Betrem, J. G. (1925). Een nieuwe aan de Anneliden verwante diervorm, het nieuwe genus Enigma. <em>Tijdschrift der Nederlandsche Dierkundige Vereeniging, Leiden.</em> Ser. 2, 19(3-4): xcix [text derived from Betrem in meeting report notes: Meeting report in Utrecht in the Institute for Zootechnick Veterinary High School.].
page(s): xcix; note: as reported in a meeting report [details]  OpenAccess publication 

taxonomy source Hartman, Olga. (1967). Polychaetous annelids collected by the USNS Eltanin and Staten Island cruises, chiefly from Antarctic Seas. <em>Allan Hancock Monographs in Marine Biology.</em> 2: 1-387.
page(s): 127; note: translation of the original description. Hartman uses a 'terwielii' spelling, which is the correct spelling. [details]  Available for editors  PDF available [request] 

additional source Rouse, G.W. and Pleijel, Fredrik 2003. Problems in polychaete systematics. Hydrobiologia 496: 175-189., available online at https://doi.org/10.1023/a:1026188630116
page(s): 180; note: incorrect spelling as 'terwillei' [details]   

status source Seid, Charlotte A.; Lindsay, Dhugal J.; Rouse, Greg W. (2020). A new southern record of the holopelagic annelid Poeobius meseres Heath, 1930 (Flabelligeridae). <em>Biodiversity Data Journal.</em> 8 (e58655): 1-12., available online at https://bdj.pensoft.net/article/58655/list/9/
page(s): 9 of 14; note: Enigma terwielii regarded as indeterminable, but plausibly a southern occurrence of Poeobius meseres, given it was within the extended range of the latter. [details]  Available for editors  PDF available [request] 
From editor or global species database
Description Translation of original genus description (presented in Hartman, 1967: 127): "The surface epithelium has papillae and the body is embedded in a hyaline mass. Parapodia and setae are absent. The prostomium has branchial filaments and a pair of palpi, both retractile into the anterior end. The nervous system has a single median, ganglionated cord. The intestine is red in life and coiled. There are 2 pairs of excretory organs, one in the anterior, the other in the posterior part of the body; they lack ciliated funnels. The dorsal blood vessel is accompanied by a cardiac body over the oesophagus. A single septum is present. The unpaired gonad lies close to the intestinal coil.” Hartman suggested the species was close to Poeobius meseres. [details]

Etymology Terwiel is evidently honouring a family name for a male (hence 'terwielii'). There appears to be few references to a Terwiel in marine biology literature, although the name is known in other fields of endeavour. However, a G. J. Terwiel collected crustacea for the Museum of Amsterdam in 1925, which is a matching time period. [details]

Status Hartman suggested the species represented by the specimen was close to the species with the junior name of Poeobius meseres. Fauchald (1977) treated the placement of Enigma as incertae sedis within Poeobiidae. He used an incorrect spelling of 'terwillei' for the species. Betrem's name Enigma terwielii was 'published' in a meeting report. A later publication was intended but is not known. The specimens were not kept and the only information on the taxon is in the brief text of the meeting report. The identity of this taxon is unknowable with certainty, therefore, taking into account the unintended publication of the name, Enigma terwielii is here treated as a nomen dubium. Seid, Lindsay & Rouse (2020) state that: "Although we regard E. terwielii as indeterminable given the problems with the description and the absence of type material or figures, we suggest that its sole record was plausibly a southern occurrence of P. meseres."
 [details]

Type locality Bay of Guayaquil, Ecuador, Western S America, East Pacific Ocean, possibly an alternate name of the Gulf of Guayaquil, 3.0 degrees S, 80.5 degrees W. Hartman (1967: 127) obtained this information in a personal communication with Betrem, then at Cornell University. [details]

Type specimen Type material lost (fide Hartman, 1967) [details]