Jassa californicus ( Boeck, 1871 )

Conlan, Kathleen E., Desiderato, Andrea & Beermann, Jan, 2021, Jassa (Crustacea: Amphipoda): a new morphological and molecular assessment of the genus, Zootaxa 4939 (1), pp. 1-191 : 160

Jassa californicus ( Boeck, 1871)

The Norwegian scientist Axel Boeck (1871) described seven new species from a collection made in the San Francisco area of California and sent to him for taxonomic assessment and deposition in Norway by a Professor Esmark. One of these was Podocerus californicus , based on two female specimens. Stebbing (1906) recognized this species as Jassa californica . Conlan (1990) noted that the whereabouts of the type specimens was unknown. As a further effort to locate these specimens, The Natural History Museum, Oslo, Norway, which is the repository for Boeck’s collection, was contacted but the reply was, “...we have not any Podocerus californicus Boeck, 1871 in our collection, and Idon’t know where you can find it — if it exists...” (Åse Ingvild Wilhelmsen, 8 June 2018). It is possible that these specimens could have been any of the species indigenous to the California coast but named much later: J. slatteryi ( Figs 3–4 ), J. morinoi ( Figs 5–6 ), J. borowskyae , J. staudei , J. carltoni , J. shawi or J. myersi ( Fig. 10 ). It is possible also that it could have been J. marmorata which would place its introduction to this area much earlier than is currently known.

Figures

FIGURE 3. Progressive discovery of Jassa slatteryi from 1850 to 1949. Red dot: identification confirmed by specimen examination; green triangle: literature record (Supplementary Table S1) with identification not confirmed but judged likely to be this species; blue x: suspected or known to be on the hull or interior of a boat or ship.

FIGURE 4. Progressive discovery of Jassa slatteryi from 1850 to 2020. Red dot: identification confirmed by specimen examination; green triangle: literature record (Supplementary Table S1) with identification not confirmed but judged likely to be this species; blue x: suspected or known to be on the hull or interior of a boat or ship.

FIGURE 5. Progressive discovery of Jassa morinoi from 1850 to 1949. Red dot: identification confirmed by specimen examination; green triangle: literature record (Supplementary Table S1) with identification not confirmed but judged likely to be this species; blue x: suspected or known to be on the hull or interior of a boat or ship.

FIGURE 6. Progressive discovery of Jassa morinoi from 1850 to 2020. Red dot: identification confirmed by specimen examination; green triangle: literature record (Supplementary Table S1) with identification not confirmed but judged likely to be this species; blue x: suspected or known to be on the hull or interior of a boat or ship.

FIGURE 10. Records of Northern Hemisphere species of Jassa that were found in the eastern and/or western North Pacific and seas. Red dot: identification confirmed by specimen examination; green triangle: literature record (Supplementary Table S1) with identification not confirmed but judged likely to be this species; blue x: suspected or known to be on the hull or interior of a boat or ship.