Micropsephodes bahamaensis Shockley, 2010

Shockley, Floyd W., 2010, Micropsephodes bahamaensis, a new species of Anamorphinae (Coleoptera: Cucujoidea: Endomychidae) from the Bahamas, with a key to the New World genera of Anamorphinae, Insecta Mundi 2010 (112), pp. 1-11 : 4-10

Micropsephodes bahamaensis Shockley , new species

( Fig. 2C , 5-9 )

Etymology. The specific epithet is based on the fact that this is the first species of Micropsephodes to be described from the Bahamas.

Diagnosis. Adults of M. bahamaensis may be distinguished from those of M. lundgreni and M. serraticornis by the combination of the following characters: larger size and elongate habitus; much shorter setae along the lateral margins of the elytra ( Fig. 2 ); ovoid pedicel and elongate antennomere III ( Fig. 6C ); lacinia unisetose apically ( Fig. 6F ); galea with 10 setae apically, the two most laterad much narrower and less stout compared to the medial eight ( Fig. 6F ).

Description. Length 1.35-1.41 mm (mean = 1.38); width 1.00- 1.02 mm (mean = 1.01); depth 0.70 mm (n = 3). Body ( Fig. 2C , 5A, B ) elongate oval, moderately convex; dorsum shining, dark brown-black, glabrous; venter, antennae, mouthparts, and legs reddish-brown, covered with vestiture of short, fine, palecolored setae.

Head. Head ( Fig. 6A, B ) deeply retracted into prothorax, highly deflexed and hypognathous, completely obscured when viewed dorsally; frontoclypeal suture present; gular sutures relatively short; frons finely and sparsely punctate; clypeus transverse and rectangular; tentorium with anterior arms convergent, but not fused medially, corpotentorium lyriform. Eyes large, round, and finely-faceted. Labrum ( Fig. 6D ) transverse and ovoid, truncate and submembranous apically. Mandible ( Fig. 6E ) bifid apically with prominent subapical tooth; prostheca divided longitudinally with a basal tuft of setae just distad of the mola; mola relatively large and finely, transversely ridged. Maxilla ( Fig. 6F ) with small triangular shaped cardo, well-developed and large basistipes, and narrow, elongate dististipes; galea with 10 large apical spines, the two lateral most spines narrow, the remaining medial eight spines thickened; lacinia narrow, bearing a single prominent spine apically; maxillary palp 4-segmented, palpomere I small and narrow, palpomere II long and expanded apically, palpomere III subquadrate, palpomere IV as long as preceding 3 segments combined and expanded medially with greatest width at 2/3 its length and apex narrowly rounded. Labium ( Fig. 6G ) with transverse mentum and quadrate prementum; labial palp 3- segmented, palpi narrowly separated basally, palpomere I large, elongate and subcylindrical, palpomere II transverse, palpomere III large ovoid to subquadrate and truncate apically. Antenna ( Fig. 6C ) 8-segmented; scape prominent, long, widening apically; pedicel subglobose; antennomere III narrow and elongate, distinctly longer than pedicel; antennomeres IV and V very small bead-like; antennomeres VI-VIII greatly enlarged to form a large, loosely articulated club, antennomeres VI and VII internally serrate.

Thorax. Pronotum ( Fig. 7A ) strongly transverse (length 0.40 mm; width 0.86 mm), highly convex, widest at base and narrowing anteriorly; anterior angles weakly produced and rounded apically; posterior angles roundly obtuse; lateral margins narrow; lacking lateral sulci; basal margin strongly lobed medially, opposite scutellum. Mesonotum ( Fig. 7B ) with small, triangular mesoscutellum. Elytra ( Fig. 7D, E ) elongate oval, convex, finely and sparsely punctate, apex slightly and narrowly reflexed; epipleuron narrowing at 2/3 length, broad basally and apically; disc and lateral margin glabrous. Metanotum ( Fig. 7C ) transverse with prominent metascutellar ridge. Metathoracic wing ( Fig. 7F ) with a single cubitoanal vein posteriorly and a long sclerotized media posterior; medial and subcubital flecks small, conspicuous and undivided; anal lobe lacking. Prosternum (Fig. 8A) with short, narrow intercoxal process, acute apically with two apical setae, process extending to posterior margin of the procoxal cavity but not beyond. Mesosternum (Fig. 8B) flat, intercoxal process transverse, weakly narrowing towards apex, and truncate (nearly concave) apically and extending to posterior margin of mesocoxal cavity but not beyond it. Metasternum (Fig. 8B) highly transverse; intercoxal process broad straight, extending to middle of metacoxal cavity where it broadly meets the rounded intercoxal process of abdominal ventrite I; metendosternite (Fig. 8C) with widely separated anterior arms, short anterolaterally-directed tendons and long, posterolaterally-directed struts.

Legs. Procoxae ( Fig. 9A ) triangularly transverse, narrowly separated by prosternal process; mesocoxae ( Fig. 9B ) globose to ovoid, widely separated by mesosternal process; metacoxae ( Fig. 9C ) highly transverse, narrowing laterally, widely separated by metasternal process and intercoxal process of abdomen. Pro-, meso-, and metathoracic legs similar in structure for femora, tibiae and tarsi; femora short, stout; tibiae long, narrow slightly expanded apically. Tarsi ( Fig. 9D ) 3-3-3 with long, lobed tarsomere I bearing spines ventrally and apically; tarsomere II relatively short with a narrow ventral lobe; tarsomere III long and narrow; pretarsus with claws sharp and ventrally bearing a flat, rectangular expansion basally, the apex of which is not acute or produced into a tooth. Figure 8. Thoracic and abdominal venter of

Abdomen. Abdomen (Fig. 8D) with six visible, Micropsephodes bahamaensis Shockley , new species. A) transverse ventrites, widest near the midpoint of Prosternum, ventral. B) Mesoventrite and Metaventrite, ventrite I and gradually narrowing apically, ventral. C) Metendosternite, ventral. D) Abdomen, ventrite VI approximately half as wide as ventrite ventral. Scale bar = 0.50 mm. I. Ventrite I with postcoxal femoral lines recurved and nearly complete, shallow posteriorly reaching less than half length of ventrite I, merging anteromedially with the lateral margins of the heavily sclerotized intercoxal process; ventrites II-V similar in length and narrowing apically; ventrite VI with posterior margin notched medially in female.

Note. The female genitalia were damaged during clearing and dissection, but generally appeared similar to that described and illustrated for Micropsephodes by Tomaszewska (2000). Given the small size of the type series, no additional specimens were dissected.

Material Examined. Holotype and paratype (both female) bear the following collection data: BAHAMAS: Andros ; Forfar Field Station ; mv + bl, 4 June 2001; R. Turnbow . Holotype deposited at FSCA ; Paratype

deposited in RHTC. An additional paratype (disarticulated) is deposited in FWSC and bears the following collection data: BAHAMAS: Andros ; Forfar Field Station ; 2 June 2001; R. Turnbow .

Figures

Figure 2. General body forms and relative sizes of Micropsephodes species. A) M. lundgreni Leschen and Carlton. B) M. serraticornis Champion. C) M. bahamaensis Shockley, new species. Scale bars = 0.50 mm.

Figure 6. Head capsule and appendages of Micropsephodes bahamaensis Shockley, new species. A) Head capsule, dorsal. B) Head capsule, ventral. C) Antenna, left, dorsal. D) Labrum, dorsal. E) Mandible, left, dorsal. F) Maxilla, right, dorsal. G) Labium, ventral. Scale bars = 0.10 mm.

Figure 7. Thoracic nota and appendages of Micropsephodes bahamaensis Shockley, new species. A) Pronotum. B) Mesonotum. C) Metanotum. D) Elytron, left, dorsal. E) Elytron, left, ventral. F) Metathoracic wing, right. Scale bars = 0.25 mm.

Figure 9. Legs of Micropsephodes bahamaensis Shockley, new species (vestiture removed). A) Prothoracic leg, left. B) Mesothoracic leg, left. C) Metathoracic leg, left. D) Close-up of prothoracic tarsus (vestiture intact). Scale bar = 0.1 mm.

Figure 3-5. Holotypes of Micropsephodes species. A) Dorsal habitus. B) Lateral habitus. C) Labels. 3) M. serraticornis Champion. 4) M. lundgreni Leschen and Carlton. 5) M. bahamaensis Shockley, new species. Scale bars = 0.50 mm.