Asterocheres intermedius Hansen 1923
Asterocheres intermedius (Hansen, 1923) Ascomyzon intermedium Hansen 1923: 6. Asterocheres intermedius : Stock 1966b: 152; Johnsson 1998: 91. Material examined . Holotype Ψ (ZMUC. CRU-6873/8357) collected during the “Danish Ingolf Expedition” in Davis Strait, Station 25 (63º30΄N, 54º25΄W), at 582 fa...
| Main Authors: | , |
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| Format: | Other/Unknown Material |
| Language: | unknown |
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Zenodo
2009
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| Online Access: | https://doi.org/10.5281/zenodo.6221574 http://treatment.plazi.org/id/03AEF308FFE9611BFF4D1BC86B9E80A7 |
| Summary: | Asterocheres intermedius (Hansen, 1923) Ascomyzon intermedium Hansen 1923: 6. Asterocheres intermedius : Stock 1966b: 152; Johnsson 1998: 91. Material examined . Holotype Ψ (ZMUC. CRU-6873/8357) collected during the “Danish Ingolf Expedition” in Davis Strait, Station 25 (63º30΄N, 54º25΄W), at 582 fathoms (ca. 1.06 km). Hosts . Unknown. Distribution . Atlantic Ocean (Hansen 1923). Remarks. Hansen (1923) omitted some taxonomically important appendages, such as the mandible and fifth legs (the latter lost in the type specimen), in his description of A . intermedius . Unfortunately, this species has not been recorded again, and only the antennule and antenna could be observed in the damaged, dissected holotype. Our observations of the pre-oral appendages differed from the original description as follows: 1) the antennule, despite being cleanly broken in half in the holotype, consists of 21 rather than 20 free segments; and 2) the endopod of the antenna is comprised of 3 instead of 2 segments. Despite these amendations, a detailed redescription of this species is still badly needed. Contrary to the above species, A . intermedius can be easily differentiated from its congeners. For instance, A . intermedius , along with the following 19 congeners, possess a 21-segmented antennule in females: A . astroidicola Conradi, Bandera & López-González, 2006; A . bacescui (Marcus, 1965); A . echinicola (Norman, 1868); A . ellisi Hamond, 1968; A . flustrae Ivanenko & Smurov, 1997; A . hirsutus Bandera, Conradi & López- González, 2005; A . jeanyeatmanae Yeatman, 1970; A . lilljeborgi (Boeck, 1859); A . lunatus Johnsson, 1998; A . madeirensis Bandera, Conradi & López-González, 2007; A . minutus (Claus, 1889); A . reginae Boxshall & Huys, 1994; A . simulans (T. Scott, 1898); A . suberitis Giesbrecht, 1897; A. tenerus (Hansen, 1923) (redescribed below as possessing a 21-segmented antennule in female); A . tenuicornis Brady, 1910; A . uncinatus (Kritchagin, 1873); A . urabensis Kim, 2004; and A . violaceus (Claus, ... |
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