Gastrosaccinae

Heard, Richard W. & Price, W. Wayne, 2006, Revision of Bowmaniella sensu B cescu, 1968 (Crustacea: Mysida: Mysidae: Gastrosaccinae): a taxonomic conundrum, Zootaxa 1269, pp. 1-29 : 24-25

Key to the burrowing genera of the subfamily Gastrosaccinae and to the currently recognized species of Bowmaniella , n. g. and Coifmanniella , n. g.

1. Pairs of strong terminal spiniform­setae of telson usually not inserted closely to subterminal setae on either side; if close together, subterminal setae less than 2/3 length of terminal setae ( Fig. 7 A–E) ........................................................................................... 2

­ Pairs of strong terminal and subterminal spiniform­setae of telson subequal (subterminal setae 2/3 or more length of terminal setae and inserted close together on either side ( Fig. 4 ) .......................................................................................................................... 5

2. Endopod of male pleopod 3 small, uniarticulated ( Fig. 7 F) .......................................... ......................................................................................... Haplostylus Kossmann, 1880

­ Endopod of male pleopod 3 multiarticulated ( Fig. 7 G–I) ........................................... 3

3. All pleopods of female uniramous ( Fig. 7 J)................................. Iiella Băcescu, 1968

­ Pleopod 1 of female biramous ( Fig 8 A); pleopods 2–5 uniramous ( Fig. 8 B) ............ 4

4. Male pleopod 3 with simple styliform exopod ( Fig. 7 G); anterior margin of labrum with long median spine ( Fig. 8 C) ..................................... Gastrosaccus Norman, 1868

­ Male pleopod 3 with complex exopod ( Fig. 7 H); anterior margin of labrum with long median spine and pair of shorter lateral spines ( Fig. 8 D) .............................................. ..................................................................................... Eurobowmaniella Murano, 1995

5. Male pleopod 3 simple, styliform; endopod uniarticulated or multiarticulated ( Fig. 8 E) .................................................................................... Archaeomysis Czerniavsky, 1882

­ Male pleopod 3 complex, not styliform, endopod uniarticulated ( Figs. 1 , 2 , 3 , 6 ) ...... 6

6. Abdominal somite 5 with articulated posterodorsal process ( Fig. 1 ); no small­spiniform setae distal to statocyst on uropodal endopod ( Fig. 5 A, B) ................................... ......................................................................................................... Bowmaniella , n. g 7

­ Abdominal somite 5 without articulated postero­dorsal process; 2–16 small spiniformsetae distal to statocyst on uropodal endopod ( Fig. 5 C–F) .......... Coifmanniella , n. g. 8

7. Exopod of male pleopod 3 of ultimate form with bow, inner branch with inner stylet fairly slender, reaching more than one­half length of distal article ( Fig. 6 D, E)) ......... ............................................................................................. B. banneri ( Băcescu, 1968)

­ Exopod of male pleopod 3 of ultimate form lacking bow, inner branch with inner stylet short and robust, reaching less than one­half length of distal article ( Fig. 2 D;

Fig. 6 B) ........................................................................ B. dissimilis ( Coifmann, 1937) 8. Telsonic cleft deep, approximately 1/3 or more length of telson ( Fig. 4 E); [posterodorsal margin of carapace reflected anterodorsally as in Fig. 8 G] ...................................... .......................................................................................... C. merjonesi ( Băcescu, 1968) ­ Telsonic cleft shallow, less than 1/5 length of telson ( Fig. 4 C, D, F) ......................... 9

9. Posterodorsal margin of carapace not reflected anterodorsally (as in Fig. 8 F) ............. ......................................................................................... C. johnsoni ( Tattersall, 1937)

­ Posterodorsal margin of carapace reflected anterodorsally ( Fig. 8 G) ...................... 10

10. Lateral margins of telson armed with rows of 4–12 subequal spiniform setae ( Fig. 4 D) ......................................................................................... C. mexicana ( Tattersall, 1951)

­ Lateral margins of telson armed with rows of 16–22 spiniform setae, 6–8 larger interrupted by smaller ones ( Fig. 4 F) .................................. C. parageia (Brattegard, 1970)

Figures

FIGURE 1. Bowmaniella dissimilis (Coifmann, 1937), lateral view of the penultimate male (from Bäcescu 1968).

FIGURE 2. Tip of male pleopod 3. Coifmanniella johnsoni (Tattersall, 1937): A, penultimate form; B, ultimate form (from Brattegard 1970 a). Bowmaniella dissimilis (Coifmann, 1937): C, penultimate form (from Stuck et al. 1979 a); D, ultimate form (from Stuck et al. 1979 a). Scale 1 = 0.1 mm for A; scale 2 = 0.5 mm for D, 1.0 mm for B, C.

FIGURE 3. Male pleopod 3. Coifmanniella johnsoni (Tattersall, 1937): A – C, penultimate form, various aspects; D, ultimate form (after Brattegard 1970 a). — Coifmanniella mexicana (Tattersall, 1951), entire pleopod: E, penultimate form (after Tattersall 1951); F, ultimate form (after Ortiz 1988). — Coifmanniella merjonesi (Bäcescu, 1968): G, penultimate form (from Bäcescu 1968); H, ultimate form. — Coifmanniella parageia (Brattegard, 1970): I, penultimate (after Brattegard 1970 a); J, ultimate form (after Brattegard 1970 a). Scale 1 = 0.1 mm for A, B, C, G; scale 2 = 0.5 mm for D, H, I, J (Scales for E & F, unavailable).

FIGURE 4. Telsons. A, Bowmaniella dissimilis (Coifmann, 1937) (after Stuck et al. 1979 a); B. Bowmaniella banneri Bäcescu, 1968 (after Holmquist 1975); C, Coifmanniella johnsoni (Tattersall, 1937) (after Tattersall 1937); D, Coifmanniella mexicana (Tattersall, 1951) (after Stuck et al. 1979 a); E, Coifmanniella merjonesi (Bäcescu, 1968) (after Bäcescu, 1968); F, Coifmanniella parageia (Brattegard, 1970) (after Brattegard 1970 a) with enlargement of lateral margin showing setation. Scale 1 = 0.2 mm for B; scale 2 = 0.8 mm for A, C – E; 1.0 mm for F.

FIGURE 5. Uropods. A, Bowmaniella dissimilis (Coifmann, 1937) (after Stuck et al. 1979 a); B. Bowmaniella banneri (Bäcescu, 1968) (after Holmquist 1975); C, Coifmanniella johnsoni (Tattersall, 1937) (after Brattegard 1970 a); D, Coifmanniella mexicana (Tattersall, 1951) (after Stuck et al. 1979 a); E, Coifmanniella merjonesi (Bäcescu, 1968) (after Bäcescu 1968); F, Coifmanniella parageia (Brattegard, 1970) (after Brattegard 1970 a). Scale 1 = 0.2 mm for B; scale 2 = 0.4 mm for E; 0.7 mm for A, D; scale 3 = 1.0 mm for C, F.

FIGURE 6. Tip of male pleopod 3. Bowmaniella dissimilis (Coifmann, 1937): A, penultimate form (from Stuck et al. 1979 a); B, ultimate form (from Stuck et al. 1979 a). — Bowmaniella banneri (Bäcescu, 1968): C, penultimate form; D, E, ultimate form, lateral and medial aspects, respectively (from Holmquist 1975). Scale = 0.2 mm.

FIGURE 7. Haplostylus similis Panampunnayil, 1997: A, telson (from Panampunnayil 1997). — Iiella iriomotensis Fukuoka & Murano, 1997: B, telson and uropods (from Fukuoka & Murano 1997). — Gastrosaccus madagascariensis Wooldridge, Mees, & Webb, 1997: C, telson (from Wooldridge et al. 1997). — Eurobowmaniella simulans (Tattersall, 1915) (= E. phuketensis Murano, 1995) [see Murano, 1996], D, telson and uropods (from Murano 1995). — Archaeomysis kokuboi (Hanamura, 1997): E, telson (from Hanamura 1997). — Hapostylus uthupus Panampunnayil, 1997: F, male pleopod 3. — Gastrosaccus trilobatus Murano & McLachlan, 1998: G, male pleopod 3. — Eurobowmaniella simulans (Tattersall, 1915): H, male pleopod 3 (from Murano 1995). — Iiella iriomotensis Fukuoka & Murano, 1997: I, male pleopod 3 (from Fukuoka & Murano 1997). — Iiella iriomotensis Fukuoka & Murano, 1997: J, female pleopod 1 (from Fukuoka & Murano 1997). Scale 1 = 0.2 mm for C, J; 0.5 mm for E – I; scale 2 = 0.5 mm for A, B, D.

FIGURE 8. Gastrosaccus madagascariensis Wooldridge, Mees, & Webb, 1997: A, female pleopod 1; B, female pleopod 2 (from Wooldridge et al. 1997). — Gastrosaccus trilobatus Murano & McLachlan, 1998: C, labrum (from Murano & McLachlan 1998). — Eurobowmaniella simulans (Tattersall, 1915): D, labrum (from Murano 1995). – Archaeomysis ochotensis Hanamura, 1997: E, male pleopod 3. — Bowmaniella dissimilis (Coifmann, 1937): F, posterior margin of carapace showing non­reflected medial lobes (from Brattegard 1970 a). — Coifmanniella parageia (Brattegard, 1970): G, posterior margin of carapace showing reflected medial lobes (from Brattegard 1970 a) Scale 1 = 0.25 mm for A, B; 0.5 mm for E; scale 2 = 0.25 mm for D; 0.5 mm for C, F, G.