(167 NTcra) Neotullbergia crassicuspis (Gisin 1944)

Members of the genus Neotullbergia have very distinctive anal spines that bear prominent lateral projections. The structure of these spines is at present, the only way to separate UK/Eire species. In Neotullbergia crassicuspis, the two anal spines are quite broad with a prominent outer spine on each; the inner side of each anal spine has a very weak projection (Fig. 1). The foot does not possess an empodium (Fig. 2) and the post-antennal organ is long and thin with about 30 simple double vesicles (Fig. 3).
Neotullbergia crassicuspis was described by Gisin (1944). There are several well-mounted specimens in the NHML collected by J.G. Sheals from Glasgow (date not given), and a literature record by Hutson (1980) from N.E. Yorks. The biggest of these specimens was 1.25 mm in length.


Fig. 1: Anal spines with prominent lateral (outer) projections (*) of Neotullbergia crassicuspis collected from Bellahouston Park, Glasgow by J.G. Sheals (date not known).

Fig. 2: Foot of the third leg of the same specimen of Neotullbergia crassicuspis shown in Fig. 1.

Fig. 3: Post-antennal organ on the left side of the head of the same specimen of Neotullbergia crassicuspis shown in Fig. 1.

 
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