Naucoridae

Mbogho, Aaron Y. & Sites, Robert W., 2013, Naucoridae Leach, 1815 (Hemiptera: Heteroptera) of Tanzania, African Invertebrates 54 (2), pp. 513-513 : 515-517

Key to the Naucoridae of Tanzania

1 Front of head folded posteroventrally ( Fig. 1 ). Foreleg pretarsus with two claws. Males with well developed tomentose patch ventrally on pro- and mesotibia (on females weakly developed) .......................................................... Laccocorinae (2)

– Front of head not folded posteroventrally ( Fig. 2 ). Foreleg pretarsus with a single claw. Without tomentose patch on pro- and mesotibia.................... Naucorinae (6)

2 Length 5.8–7.4 mm. Hemelytra with embolar and claval sutures absent ( Fig. 15 ) (Lake Tanganyika)....................................................... Aneurocoris insolitus Montandon

– Length ≥ 7.5 mm. Hemelytra with embolar and claval sutures distinct ( Figs 4 , 16–19 ) .................................................................................................................................3

3 Pronotum with greatest width approximately twice its length at midline ( Fig. 16 ). Female with two protarsal segments .................... Ctenipocoris africanus Poisson

– Pronotum with greatest width approximately 3× its length at midline ( Figs 17–19 ). Female with one protarsal segment................................................... Laccocoris (4)

4 Labrum broad, half as long as wide at base; roundedly pointed; reaching at most to middle of penultimate segment of labium. Body large, length 10–13 mm ............... ................................................................................ L. spurcus congoensis Poisson

– Labrum triangular or acuminate, slightly shorter than wide at base; reaching distal segment of labium. Body shorter, length <10 mm ..................................................5

5 Mesosternal tubercle low, broad, and rounded in profile. Pronotum with posterolateral corners broadly rounded or truncated, not pointed or produced caudad ( Fig. 18 ). Claval commissure subequal in length to scutellum at midline. Hemelytral membrane broad............................................................................................. L. limigenus Stål

– Mesosternal tubercle produced, bluntly acute in profile. Pronotum with posterolateral corners slightly produced caudad or at least bluntly pointed ( Fig. 17 ). Claval commissure approximately twice length of scutellum at midline. Hemelytral membrane narrow............................................................................................ L. limicola (Stål)

6 Head including eyes distinctly wider than anterior margin of scutellum ( Fig. 22 ). Body flattened, pyriform. Male with tergites 7 & 8 unmodified. Male parameres elongate and crossing ( Fig. 10 ); aedeagus unmodified distally ................................ ............................................................................ Naucoris obscuratus Montandon

– Head as wide as or narrower than anterior margin of scutellum ( Figs 20, 21 , 23–29 ). Body dorsoventrally robust, ovate. Male with abdominal terga 7 and/or 8 modified with asymmetrical medial lobes ( Fig. 3 ). Male parameres present ( Fig. 9 ) or absent ( Figs 11–14 ); aedeagus modified distally with complex vesica ( Figs 9, 11–14 )....7

7 Greatest head width across the eyes is less than half the greatest pronotum width ( Figs 23–29 ). Male parameres absent ( Figs 11–14 ).................. Neomacrocoris (8)

– Greatest head width across the eyes is more than half the greatest pronotum width ( Figs 20, 21 ). Male parameres well developed ( Fig. 9 ) ................. Macrocoris (15)

8 Body large, usually ovate; length ≥10.0 mm; width/length ratio usually ≥0.675...9

– Body smaller and more elongate; length <10.0 mm; width/length ratio <0.675...12

9 Females (female of N. karimii unknown)..............................................................10

– Males (male of N. usambaricus unknown) ...........................................................11

10 Subgenital plate with lateral margins smoothly sinuate to distal spatulate process ( Fig. 5 )......................................................................... N. usambaricus Montandon

– Subgenital plate with strong mid-lateral projections and distal spatulate process ( Fig. 6 )................................................................................................. N. vuga Sites

11 Phallosoma with acute apical hook projecting to left ( Fig. 14 ) .......... N. vuga Sites

– Phallosoma with left side of apex flattened ( Fig. 11 )................. N. karimii Poisson

12 Thick setae scattered sparsely on scutellum and hemelytra, including on clavus, embolium, corium, and membrane ( Fig. 28 ). Pronotum slightly flattened ( Fig. 7 )....... .................................................................................... N. handlirschi (Montandon)

– Thick setae restricted to embolium and adjacent areas of corium, although thin hairlike setae can be present throughout. Pronotum dorsoventrally robust ( Fig. 8 )....13

13 Lateral margin of embolium slightly less arcuate in anterior ⅓ to ½ ( Fig. 26 ). Phallosoma with rounded gibbosity on right ( Fig. 12 ).................... N. bondelaufa Sites

– Lateral margin of embolium evenly arcuate throughout ( Figs 23, 24 ). Phallosoma with elongate flange on right ( Fig. 13 )..................................................................14

14 Pronotum with black spots on lateral ⅓ larger than spots on central ⅔ ( Fig. 24 )..... ................................................................................ N. parviceps ocellatus Poisson

– Pronotum with black spots on lateral ⅓ subequal to spots on central ⅔ ( Fig. 23 ).... ...................................................................... N. parviceps parviceps (Montandon)

15 Pronotum mostly yellow (green in live specimens) with sparse large black spots ( Fig. 20 ), some specimens with dark punctation in addition to larger dark spots. Connexiva continuously greenish yellow ............................ M. flavicollis Signoret

– Pronotum with profuse small black spots ( Fig. 21 ). Connexiva with posterolateral corners dark brown, yellow anteriorly ......................... M. laticollis Montandon Annotated list of Naucoridae of Tanzania

Figures

Figs 1–4. (1, 2) Lateral aspect of head of (1) Laccocoris limigenus (Laccocorinae) and (2) Neomacrocoris parviceps (Naucorinae) showing position of labrum (white arrow) with respect to the front of the head; (3) terminal abdominal terga of male Macrocoris flavicollis with asymmetrical medial lobes of segments 7 and 8; (4) Laccocoris limigenus. Abbreviations: cc – claval commissure, cl – clavus, cls – claval suture, co – corium, cx – connexivum, em – embolium, ems – embolar suture, mb – membrane, prn – pronotum, scl – scutellum.

Figs 15, 16. (15) Aneurocoris insolitus male from L-1203, (16) Ctenipocoris africanus male from Namanve Swamp, Uganda.

Figs 17–19. (17) Laccocoris limicola female from L-1158, (16) Laccocoris limigenus male from L-1225, (19) Laccocoris spurcus congoensis female from L-1207. Sizes are proportionate among figures.

Figs 20–22. (20) Macrocoris flavicollis female from L-1260, (21) Macrocoris laticollis male from L-1156, (22) Naucoris obscuratus female from Lake Rukwa,Tanzania.Sizes are proportionate among figures.

Figs 9–14. Male genitalia: (9) Macrocoris flavicollis, (10) Naucoris obscuratus, (11) Neomacrocoris karimii, (12) Neomacrocoris bondelaufa, (13) Neomacrocoris parviceps, (14) Neomacrocoris vuga. Abbreviations: LP – left paramere, RP – right paramere, ph – phallosoma, ve – vesica. (Figs 11–14 are reproduced from Sites & Mbogho (2012), with permission by Magnolia Press.)

Figs 23–29. (23) Neomacrocoris parviceps parviceps, (24) Neomacrocoris parviceps ocellatus, (25) Neomacrocoris usambaricus, (26) Neomacrocoris bondelaufa, (27) Neomacrocoris vuga, (28) Neomacrocoris handlirschi, (29)Neomacrocoris karimii.Sizes areproportionate among figures.(Figs 24–30 reproduced from Sites & Mbogho (2012), with permission by Magnolia Press.)

Figs 5–8. (5, 6) Terminal abdominal sterna of female including subgenital plates of (5) Neomacrocoris usambaricus and (6) Neomacrocoris vuga; (7, 8) lateral view of pronotum of (7) Neomacrocoris handlirschi and(8) Neomacrocorisparviceps.(Reproduced from Sites& Mbogho (2012), with permission by Magnolia Press.)